Sample records for air quality state
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ERIC Educational Resources Information Center
Pollution Engineering, 1978
1978-01-01
This article presents in tabular form the air quality standards for sulfur dioxide, carbon monoxide, nitrogen dioxide, photochemicals, non-methane hydrocarbons and particulates for each of the 50 states and the District of Columbia. (CS)
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40 CFR 81.76 - State of Hawaii Air Quality Control Region.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 17 2011-07-01 2011-07-01 false State of Hawaii Air Quality Control... PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.76 State of Hawaii Air Quality Control Region. The State of Hawaii Air Quality...
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40 CFR 81.76 - State of Hawaii Air Quality Control Region.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 17 2010-07-01 2010-07-01 false State of Hawaii Air Quality Control... PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.76 State of Hawaii Air Quality Control Region. The State of Hawaii Air Quality...
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40 CFR 81.76 - State of Hawaii Air Quality Control Region.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 18 2012-07-01 2012-07-01 false State of Hawaii Air Quality Control... PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.76 State of Hawaii Air Quality Control Region. The State of Hawaii Air Quality...
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40 CFR 81.76 - State of Hawaii Air Quality Control Region.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 18 2013-07-01 2013-07-01 false State of Hawaii Air Quality Control... PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.76 State of Hawaii Air Quality Control Region. The State of Hawaii Air Quality...
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40 CFR 52.14 - State ambient air quality standards.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 3 2010-07-01 2010-07-01 false State ambient air quality standards. 52.14 Section 52.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... quality standards. Any ambient air quality standard submitted with a plan which is less stringent than a...
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40 CFR 52.14 - State ambient air quality standards.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 3 2014-07-01 2014-07-01 false State ambient air quality standards. 52.14 Section 52.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... quality standards. Any ambient air quality standard submitted with a plan which is less stringent than a...
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40 CFR 52.14 - State ambient air quality standards.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 3 2012-07-01 2012-07-01 false State ambient air quality standards. 52.14 Section 52.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... quality standards. Any ambient air quality standard submitted with a plan which is less stringent than a...
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40 CFR 52.14 - State ambient air quality standards.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 3 2011-07-01 2011-07-01 false State ambient air quality standards. 52.14 Section 52.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... quality standards. Any ambient air quality standard submitted with a plan which is less stringent than a...
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40 CFR 52.14 - State ambient air quality standards.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 3 2013-07-01 2013-07-01 false State ambient air quality standards. 52.14 Section 52.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS... quality standards. Any ambient air quality standard submitted with a plan which is less stringent than a...
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Air Quality Modeling Technical Support Document for the Final Cross State Air Pollution Rule Update
In this technical support document (TSD) we describe the air quality modeling performed to support the final Cross State Air Pollution Rule for the 2008 ozone National Ambient Air Quality Standards (NAAQS).
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-20
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... Metropolitan Air Quality Management District (SMAQMD or District) portion of the California State... Designee. (i) Incorporation by Reference. (A) Sacramento Metropolitan Air Quality Management District. (1...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-10-05
... the California State Implementation Plan; Sacramento Metropolitan Air Quality Management District... approve a revision to the Sacramento Metropolitan Air Quality Management District's portion of the... Metropolitan Air Quality Management District (SMAQMD) adopted the ``Ozone State Implementation Plan Revision...
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In this technical support document (TSD) we describe the air quality modeling performed to support the proposed Cross-State Air Pollution Rule for the 2008 ozone National Ambient Air Quality Standards (NAAQS)
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-07-26
... the California State Implementation Plan, Antelope Valley Air Quality Management District AGENCY... the Antelope Valley Air Quality Management District (AVAQMD) portion of the California State... for the South Coast Air Quality Management District (SCAQMD). The Antelope Valley Air Pollution...
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The state of ambient air quality in Pakistan--a review.
Colbeck, Ian; Nasir, Zaheer Ahmad; Ali, Zulfiqar
2010-01-01
Pakistan, during the last decade, has seen an extensive escalation in population growth, urbanization, and industrialization, together with a great increase in motorization and energy use. As a result, a substantial rise has taken place in the types and number of emission sources of various air pollutants. However, due to the lack of air quality management capabilities, the country is suffering from deterioration of air quality. Evidence from various governmental organizations and international bodies has indicated that air pollution is a significant risk to the environment, quality of life, and health of the population. The Government has taken positive steps toward air quality management in the form of the Pakistan Clean Air Program and has recently established a small number of continuous monitoring stations. However, ambient air quality standards have not yet been established. This paper reviews the data being available on the criteria air pollutants: particulate matter (PM), sulfur dioxide, ozone, carbon monoxide, nitrogen dioxide, and lead. Air pollution studies in Pakistan published in both scientific journals and by the Government have been reviewed and the reported concentrations of PM, SO(2), O(3), CO, NO(2), and Pb collated. A comparison of the levels of these air pollutants with the World Health Organization air quality guidelines was carried out. Particulate matter was the most serious air pollutant in the country. NO(2) has emerged as the second high-risk pollutant. The reported levels of PM, SO(2), CO, NO(2), and Pb were many times higher than the World Health Organization air quality guidelines. Only O(3) concentrations were below the guidelines. The current state of air quality calls for immediate action to tackle the poor air quality. The establishment of ambient air quality standards, an extension of the continuous monitoring sites, and the development of emission control strategies are essential.
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-07-14
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District and South Coast Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION... Metropolitan Air Quality Management District (SMAQMD) and South Coast Air Quality Management District (SCAQMD...
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Region 7 States Air Quality Monitoring Plans - Iowa
National Ambient Air Quality Standard (NAAQS) - Iowa, Kansas, Missouri, and Nebraska; Annual Monitoring Network Plans, Five-Year Monitoring Network Assessments, and approval documentation. Each year, states are required to submit an annual monitoring netwo
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Region 7 States Air Quality Monitoring Plans - Missouri
National Ambient Air Quality Standard (NAAQS) - Iowa, Kansas, Missouri, and Nebraska; Annual Monitoring Network Plans, Five-Year Monitoring Network Assessments, and approval documentation. Each year, states are required to submit an annual monitoring netwo
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Region 7 States Air Quality Monitoring Plans - Nebraska
National Ambient Air Quality Standard (NAAQS) - Iowa, Kansas, Missouri, and Nebraska; Annual Monitoring Network Plans, Five-Year Monitoring Network Assessments, and approval documentation. Each year, states are required to submit an annual monitoring netwo
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Region 7 States Air Quality Monitoring Plans - Kansas
National Ambient Air Quality Standard (NAAQS) - Iowa, Kansas, Missouri, and Nebraska; Annual Monitoring Network Plans, Five-Year Monitoring Network Assessments, and approval documentation. Each year, states are required to submit an annual monitoring netwo
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-26
... the California State Implementation Plan, Northern Sierra Air Quality Management District, Sacramento Metropolitan Air Quality Management District, and South Coast Air Quality Management District AGENCY... the Northern Sierra Air Quality Management District (NSAQMD), Sacramento Metropolitan Air Quality...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-09-26
...] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State...'s Designee. (i) Incorporation by Reference. (A) South Coast Air Quality Management District. (1...
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76 FR 43598 - Approval and Promulgation of Air Quality Plans: State of Missouri
Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-21
... Promulgation of Air Quality Plans: State of Missouri AGENCY: Environmental Protection Agency (EPA). ACTION... Control Technology (RACT) for purposes of attaining the 1997 8-hour ozone National Ambient Air Quality...-assured ozone air quality data for 2008-2010, which demonstrate that the 1997 8-hour ozone NAAQS has been...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-08-04
... California State Implementation Plan; South Coast Air Quality Management District AGENCY: Environmental... revision to the South Coast Air Quality Management District portion of the California State Implementation... Submittal A. What rule did the State submit? We are approving South Coast Air Quality Management District...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-26
... California State Implementation Plan, Northern Sierra Air Quality Management District, Sacramento Metropolitan Air Quality Management District, and South Coast Air Quality Management District AGENCY... approve revisions to the Northern Sierra Air Quality Management District (NSAQMD), Sacramento Metropolitan...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-04-09
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... final action to approve revisions to the Sacramento Metropolitan Air Quality Management District (SMAQMD...) * * * (362) * * * (i) * * * (C) Sacramento Metropolitan Air Quality Management District. (1) Rule 450...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-04-12
... the California State Implementation Plan; Sacramento Metropolitan Air Quality Management District... a revision to the Sacramento Metropolitan Air Quality Management District's portion of the... (Permit No. 17359), which was issued by the Sacramento Metropolitan Air Quality Management District...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-07-14
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District and South Coast Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION... Management District (SMAQMD) and South Coast Air Quality Management District (SCAQMD) portions of the...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-10-05
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... Measure for Architectural Coatings,'' CARB, October 2007. 4. ``Improving Air Quality with Economic...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-11-07
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... Control Measure for Architectural Coatings,'' CARB, October 2007. 4. ``Improving Air Quality with Economic...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-09-08
... California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY: Environmental...-Solano Air Quality Management District portion of the California State Implementation Plan (SIP). This... the following local rule: Yolo-Solano Air Quality Management District Rule 2.41, Expandable...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-03-28
... California State Implementation Plan, South Coast Air Quality Management District AGENCY: Environmental... revision to the South Coast Air Quality Management District (SCAQMD) portion of the California State...) * * * (411) * * * (i) * * * (F) South Coast Air Quality Management District. (1) Rule 463, ``Organic Liquid...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-06-29
... the California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY... the Yolo-Solano Air Quality Management District (YSAQMD) portion of the California State...) * * * (i) * * * (C) Yolo Solano Air Quality Management District (1) Rule 3.21, ``Rice Straw Emission...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-05-27
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... overwhelmingly formed as a secondary pollutant. (South Coast 2007 Air Quality Management Plan, page ES-9...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-16
... California State Implementation Plan, Antelope Valley Air Quality Management District and Ventura County Air...: EPA is taking direct final action to approve revisions to the Antelope Valley Air Quality Air Management District (AVAQMD) and Ventura County Air Pollution Control District (VCAPCD) portions of the...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-06-11
...] Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan... Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements'' which published in the... the 2008 ozone national ambient air quality standards (NAAQS) (the ``2008 ozone NAAQS'') that were...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-08-04
... the California State Implementation Plan; South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan... following local rule: South Coast Air Quality Management District Rule 1175, Control of Emissions from the...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-04-16
... the California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY... the Yolo-Solano Air Quality Management District (YSAQMD) portion of the California State.... ``Improving Air Quality with Economic Incentive Programs,'' EPA- 452/R-01-001, January 2001. B. Does the rule...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-09-08
... California State Implementation Plan; Yolo-Solano Air Quality Management District AGENCY: Environmental... revision to the Yolo-Solano Air Quality Management District portion of the California State Implementation...-Solano Air Quality Management District (YSAQMD) Rule 2.41, adopted on September 10, 2008, and submitted...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-11
... the California State Implementation Plan, Butte County Air Quality Management District and Sacramento Metropolitan Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION: Direct... Quality Management District (BCAQMD) and Sacramento Metropolitan Air Quality Management District (SMAQMD...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-05-19
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... Metropolitan Air Quality Management District (SMAQMD or District) portion of the California State... action: Is not a ``significant regulatory action'' subject to review by the Office of Management and...
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EPA is taking final action to approve a revision to the Butte County Air Quality Management District (BCAQMD) portion of the California State Implementation Plan (SIP). This revision concerns the District's New Source Review (NSR) permitting program.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-29
... the California State Implementation Plan, Antelope Valley Air Quality Management District, Santa Barbara County Air Pollution Control District, South Coast Air Quality Management District and Ventura... rule. SUMMARY: EPA is proposing to approve revisions to the Antelope Valley Air Quality Management...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-09-24
... the California State Implementation Plan, Antelope Valley Air Quality Management District, Santa Barbara County Air Pollution Control District, South Coast Air Quality Management District and Ventura.... SUMMARY: EPA is finalizing approval of revisions to the Antelope Valley Air Quality Management District...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-01-18
... the California State Implementation Plan, Antelope Valley Air Quality Management District and Imperial... Quality Management District (AVAQMD) and Imperial County Air Pollution Control District (ICAPCD) portions... Technology (RACT),'' adopted on February 23, 2010. * * * * * (G) Antelope Valley Air Quality Management...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-09-30
...] Revisions to the California State Implementation Plan, Antelope Valley Air Quality Management District... of plan. * * * * * (c) * * * (428) * * * (i) * * * (B) Antelope Valley Air Quality Management...) * * * (i) * * * (B) Antelope Valley Air Quality Management District. (1) Rule 431.1, ``Sulfur Content of...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-11
... the California State Implementation Plan, Butte County Air Quality Management District and Sacramento Metropolitan Air Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve revisions to the Butte County Air Quality Management...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-01
... the California State Implementation Plan, Antelope Valley Air Quality Management District AGENCY... approve revisions to the Antelope Valley Air Quality Management District (AVAQMD) portion of the... approving with the dates that they were adopted by the Antelope Valley Air Quality Management District...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-02-28
... the California State Implementation Plan, Mojave Desert Air Quality Management District AGENCY... limited disapproval of revisions to the Mojave Desert Air Quality Management District (MDAQMD) portion of...,'' Northeast States for Coordinated Air Use Management, December 2000. B. Does the rule meet the evaluation...
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Healthier Schools: A Review of State Policies for Improving Indoor Air Quality. Research Report.
ERIC Educational Resources Information Center
Bernstein, Tobie
Existing indoor air quality (IAQ) policies for schools reflect the variety of institutional, political, social, and economic contexts that exist within individual states. The purpose of this report is to provide a better understanding of the types of policy strategies used by states in addressing general indoor air quality problems. The policies…
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-06-24
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... Quality Index rather than on 1-hour ozone forecasted values; (b) forecast criteria for allowing a...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-05-23
... Promulgation of Air Quality Implementation Plans; Illinois; Air Quality Standards Revision AGENCY... Illinois state implementation plan (SIP) to reflect current National Ambient Air Quality Standards (NAAQS... Implementation Plan at 35 Illinois Administrative Code part 243, which updates National Ambient Air Quality...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-02-04
... the California State Implementation Plan, South Coast Air Quality Management District, Proposed Rule... approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California... digesters. Rule 1127 was designed to implement the 2003 Air Quality Management Plan (AQMP) control measure...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-01
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0383; FRL-9428-1] Revisions to the California State Implementation Plan, Antelope Valley Air Quality Management District AGENCY... the Antelope Valley Air Quality Management District (AVAQMD) portion of the California State...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-02-14
... Quality Implementation Plan; California; Sacramento Metropolitan Air Quality Management District... Sacramento Metropolitan Air Quality Management District (SMAQMD or District) portion of the California State... sources within the areas covered by the plan as necessary to assure that the National Ambient Air Quality...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-01
... the California State Implementation Plan, Antelope Valley Air Quality Management District and Mojave Desert Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION: Direct final... Quality Management District (AVAQMD) and Mojave Desert Air Quality Management District (MDAQMD) portion of...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-05-10
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2009-0573; FRL-9146-5] Disapproval of State Implementation Plan Revisions, South Coast Air Quality Management District AGENCY: Environmental... South Coast Air Quality Management District (SCAQMD) portion of the California State Implementation Plan...
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Ambient Air Quality Data Inventory
The Office of Air and Radiation's (OAR) Ambient Air Quality Data (Current) contains ambient air pollution data collected by EPA, other federal agencies, as well as state, local, and tribal air pollution control agencies. Its component data sets have been collected over the years from approximately 10,000 monitoring sites, of which approximately 5,000 are currently active. OAR's Office of Air Quality Planning and Standards (OAQPS) and other internal and external users, rely on this data to assess air quality, assist in Attainment/Non-Attainment designations, evaluate State Implementation Plans for Non-Attainment Areas, perform modeling for permit review analysis, and other air quality management functions. Air quality information is also used to prepare reports for Congress as mandated by the Clean Air Act. This data covers air quality data collected after 1980, when the Clean Air Act requirements for monitoring were significantly modified. Air quality data from the Agency's early years (1970s) remains available (see OAR PRIMARY DATA ASSET: Ambient Air Quality Data -- Historical), but because of technical and definitional differences the two data assets are not directly comparable. The Clean Air Act of 1970 provided initial authority for monitoring air quality for Conventional Air Pollutants (CAPs) for which EPA has promulgated National Ambient Air Quality Standards (NAAQS). Requirements for monitoring visibility-related parameters were added in 1977. Requiremen
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-15
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... approve revisions to the South Coast Air Quality Management District (SCAQMD) portion of the California... Governor's Designee. (i) Incorporation by reference. (A) South Coast Air Quality Management District. (1...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-10-25
... the California State Implementation Plan, Mojave Desert Air Quality Management District AGENCY... limited disapproval of revisions to the Mojave Desert Air Quality Management District (MDAQMD) portion of.... * * * * * (c) * * * (379) * * * (i) * * * (E) Mojave Desert Air Quality Management District. (1) Rule 1159...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-06-08
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... approve revisions to the South Coast Air Quality Management District (SCAQMD) portion of the California... submit regulations that control the primary and secondary National Ambient Air Quality Standards (NAAQS...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-01
... the California State Implementation Plan, Feather River Air Quality Management District AGENCY... limited disapproval of revisions to the Feather River Air Quality Management District (FRAQMD) portion of.... * * * * * (c) * * * (378) * * * (i) * * * (E) Feather River Air Quality Management District. (1) Rule 3.22...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-05-10
... the California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY... approve revisions to the Yolo-Solano Air Quality Management District (YSAQMD) portion of the California... Identification of plan. * * * * * (c) * * * (377) * * * (i) * * * (B) Yolo Solano Air Quality Management District...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-05-23
... Promulgation of Air Quality Implementation Plans; Illinois; Air Quality Standards Revision AGENCY... the Illinois State Implementation Plan (SIP) to reflect current national ambient air quality standards...) 692-2450. 4. Mail: Pamela Blakley, Chief, Control Strategies Section, Air Programs Branch (AR-18J), U...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-08-29
... Quality Implementation Plans; California; South Coast Air Quality Management District; Prevention of... rule. SUMMARY: EPA is proposing approval of a permitting rule submitted for the South Coast Air Quality Management District (District) portion of the California State Implementation Plan (SIP). The State is...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-04-18
... the California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY... approve revisions to the Yolo-Solano Air Quality Management District (Yolo-Solano AQMD) portion of the.... * * * * * (381) * * * (i) * * * (I) Yolo-Solano Air Quality Management District. (1) Rule 2.3, ``Ringelmann Chart...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-08
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... limited disapproval of revisions to the South Coast Air Quality Management District (SCAQMD) portion of... designated nonattainment for the fine particulate matter (PM2.5) National Ambient Air Quality Standards...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-08-09
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... final action to approve revisions to the Sacramento Metropolitan Air Quality Management District portion... ``significant regulatory action'' subject to review by the Office of Management and Budget under Executive Order...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-10-17
... the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... final action to approve revisions to the Sacramento Metropolitan Air Quality Management District (SMAQMD..., this action: Is not a ``significant regulatory action'' subject to review by the Office of Management...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-01
... the California State Implementation Plan, Antelope Valley Air Quality Management District and Mojave Desert Quality Management District AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve revisions to the Antelope Valley Air Quality Management District...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-08-12
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... not a ``significant regulatory action'' subject to review by the Office of Management and Budget under...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-05-23
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... ``significant regulatory action'' subject to review by the Office of Management and Budget under Executive Order...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-12-20
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California... Reference (A) South Coast Air Quality Management District (1) Rule 2005, ``New Source Review for RECLAIM...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-05-20
... the California State Implementation Plan, Mojave Desert Air Quality Management District AGENCY... approve revisions to the Mojave Desert Air Quality Management District (MDAQMD) portion of the California... approving with the dates that they were adopted by the Mojave Desert Air Quality Management District (MDAQMD...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-04-09
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2010-0045; FRL-9124-4] Revisions to the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... approve revisions to the Sacramento Metropolitan Air Quality Management District (SMAQMD) portion of the...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-10-17
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0754; FRL-9740-6] Revisions to the California State Implementation Plan, Sacramento Metropolitan Air Quality Management Districts... approve revisions to the Sacramento Metropolitan Air Quality Management District (SMAQMD) portion of the...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-08-09
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0311; FRL-9687-2] Revisions to the California State Implementation Plan, Sacramento Metropolitan Air Quality Management District... approve revisions to the Sacramento Metropolitan Air Quality Management District (SMAQMD) portion of the...
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The Contribution of Marine Organics to the Air Quality of the Western United States
The contribution of marine organic emissions to the air quality in coastal areas of the western United States is studied using the latest version of the US Environmental Protection Agency (EPA) regional-scale Community Multiscale Air Quality (CMAQv4.7) modeling system. Emissions ...
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Ozone - Current Air Quality Index
GO! Local Air Quality Conditions Zip Code: State : My Current Location Current AQI Forecast AQI Loop More Maps AQI: Good (0 - 50) ... resources for Hawaii residents and visitors more announcements Air Quality Basics Air Quality Index | Ozone | Particle Pollution | Smoke ...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-03
... Promulgation of Air Quality Implementation Plans; Ohio; Ohio Ambient Air Quality Standards; Correction AGENCY... approved revisions to Ohio regulations that consolidated air quality standards in a new chapter of rules... State's air quality standards into Ohio Administrative Code (OAC) 3745-25 and modifying an assortment of...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-15
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0537; FRL-9432-1] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-12-20
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0897; FRL-9499-8] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-05-20
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0030; FRL-9308-4] Revisions to the California State Implementation Plan, Mojave Desert Air Quality Management District AGENCY... the Mojave Desert Air Quality Management District (MDAQMD) portion of the California State...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-03-26
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State...'' subject to review by the Office of Management and Budget under Executive Order 12866 (58 FR 51735, October...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-11-22
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan... Office of Management and Budget under Executive Order 12866 (58 FR 51735, October 4, 1993); Does not...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-08-04
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2010-0503; FRL-9183-5] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-05-10
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2010-0286; FRL-9138-7] Revisions to the California State Implementation Plan, Yolo Solano Air Quality Management District AGENCY... the Yolo-Solano Air Quality Management District (YSAQMD) portion of the California State...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-07
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... Office of Management and Budget under Executive Order 12866 (58 FR 51735, October 4, 1993); Does not...
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Workshop on Agricultural Air Quality: State of the science
NASA Astrophysics Data System (ADS)
Aneja, Viney P.; Blunden, Jessica; Roelle, Paul A.; Schlesinger, William H.; Knighton, Raymond; Niyogi, Dev; Gilliam, Wendell; Jennings, Greg; Duke, Clifford S.
The first Workshop on Agricultural Air Quality: State of the Science was held at the Bolger Center in Potomac, Maryland from 4 to 8 June 2006. This international conference assembled approximately 350 people representing 25 nations from 5 continents, with disciplines ranging from atmospheric chemistry to soil science. The workshop was designed as an open forum in which participants could openly exchange the most current knowledge and learn about numerous international perspectives regarding agricultural air quality. Participants represented many stakeholder groups concerned with the growing need to assess agricultural impacts on the atmosphere and to develop beneficial policies to improve air quality. The workshop focused on identifying methods to improve emissions inventories and best management practices for agriculture. Workshop participants also made recommendations for technological and methodological improvements in current emissions measurement and modeling practices. The workshop commenced with a session on agricultural emissions and was followed by international perspectives from the United States, Europe, Australia, India, and South America. This paper summarizes the findings and issues of the workshop and articulates future research needs. These needs were identified in three general areas: (1) improvement of emissions measurement; (2) development of appropriate emission factors; and (3) implementation of best management practices (BMPs) to minimize negative environmental impacts. Improvements in the appropriate measurements will inform decisions regarding US farming practices. A need was demonstrated for a national/international network to monitor atmospheric emissions from agriculture and their subsequent depositions to surrounding areas. Information collected through such a program may be used to assess model performance and could be critical for evaluating any future regulatory policies or BMPs. The workshop concluded that efforts to maximize
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-04-18
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0180; FRL-9652-3] Revisions to the California State Implementation Plan, Yolo- Solano Air Quality Management District AGENCY... the Yolo-Solano Air Quality Management District portion of the California State Implementation Plan...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-06-01
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0236; FRL-9670-9] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-06-08
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2010-0276; FRL-9139-8] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District portion of the California State Implementation Plan...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-09-13
...] Revisions to the California State Implementation Plan, South Coast Air Quality Management District AGENCY... the South Coast Air Quality Management District (SCAQMD) portion of the California State... the Office of Management and Budget under Executive Order 12866 (58 FR 51735, October 4, 1993); does...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-04-17
... the Arizona State Implementation Plan, Pinal County Air Quality Control District AGENCY: Environmental... disapproval of a revision to the Pinal County Air Quality Control District portion of the Arizona State... the Control Officer to determine whether the manner of control of fugitive emissions is satisfactory...
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The Air Quality System (AQS) database contains measurements of air pollutant concentrations from throughout the United States and its territories. The measurements include both criteria air pollutants and hazardous air pollutants.
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76 FR 43637 - Approval and Promulgation of Air Quality Plans: State of Missouri
Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-21
... Promulgation of Air Quality Plans: State of Missouri AGENCY: Environmental Protection Agency (EPA). ACTION...) metropolitan 8-hour ozone nonattainment area from the Clean Air Act (CAA) requirements for NO X Reasonably Available Control Technology (RACT) for purposes of attaining the 1997 8-hour ozone National Ambient Air...
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FORECASTING AIR QUALITY OVER THE UNITED STATES
Increased awareness of national air quality issues on the part of the media and the general public have recently led to more demand for short-term (1-2 day) air quality forecasts for use in assessing potential health impacts (e.g., on children, the elderly, and asthmatics) and po...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-07-24
...] Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan... Rule Regarding ``Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State... ground-level ozone formation. B. What should I consider as I prepare my comments for the EPA? 1...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-10-26
... Promulgation of Air Quality Implementation Plans; Ohio; Ohio Ambient Air Quality Standards AGENCY... the Ohio Administrative Code (OAC) relating to the consolidation of Ohio's Ambient Air Quality Standards (AAQS) into Ohio's State Implementation Plan (SIP) under the Clean Air Act. On April 8, 2009, and...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-01
... Promulgation of Air Quality Implementation Plans; Indiana; Lead Ambient Air Quality Standards AGENCY... Indiana State Implementation Plan (SIP) for lead (Pb) under the Clean Air Act (CAA). This submittal incorporates the National Ambient Air Quality Standards (NAAQS) for Pb promulgated by EPA in 2008. DATES...
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Hirabayashi, Satoshi; Nowak, David J
2016-08-01
Trees remove air pollutants through dry deposition processes depending upon forest structure, meteorology, and air quality that vary across space and time. Employing nationally available forest, weather, air pollution and human population data for 2010, computer simulations were performed for deciduous and evergreen trees with varying leaf area index for rural and urban areas in every county in the conterminous United States. The results populated a national database of annual air pollutant removal, concentration changes, and reductions in adverse health incidences and costs for NO2, O3, PM2.5 and SO2. The developed database enabled a first order approximation of air quality and associated human health benefits provided by trees with any forest configurations anywhere in the conterminous United States over time. Comprehensive national database of tree effects on air quality and human health in the United States was developed. Copyright © 2016 Elsevier Ltd. All rights reserved.
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In this technical support document (TSD) EPA describes the air quality modeling performed to support the Environmental Protection Agency’s Transport Rule proposal (now known as the Cross-State Air Pollution Rule).
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The United States has established a series of standards for criteria and other air pollutants to safeguard air quality to protect human health and the environment. The Climate Impact on Regional Air Quality (CIRAQ) project, a collaborative research effort involving multiple Fede...
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Air Quality System (AQS) Metadata
The U.S. Environmental Protection Agency compiles air quality monitoring data in the Air Quality System (AQS). Ambient air concentrations are measured at a national network of more than 4,000 monitoring stations and are reported by state, local, and tribal
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-08-17
... the California State Implementation Plan, South Coast Air Quality Management District (SCAQMD) AGENCY... sources, to achieve emissions reductions milestones, to attain and maintain ambient air quality standards... ``significant regulatory action'' subject to review by the Office of Management and Budget under Executive Order...
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Characterizing the Exposure of Regional-Scale Air Quality in the Northeastern United States
The Clean Air Act (CAA) requires that the United States (U.S.) Environmental Protection Agency (EPA) set National Ambient Air Quality Standards (NAAQS) for pollutants considered harmful to human health and the environment. Previous research has shown that high ambient ozone leve...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-01-18
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0987; FRL-9617-5] Revisions to the California State Implementation Plan, Antelope Valley Air Quality Management District and Imperial... rule. SUMMARY: EPA is proposing to approve revisions to the Antelope Valley Air Quality Management...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-09-01
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0537; FRL-9457-6] California State Implementation Plan, South Coast Air Quality Management District; Withdrawal of Direct Final Rule... Implementation Plan (SIP). This revision concerned South Coast Air Quality Management District (SCAQMD) Rule 1143...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-16
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2013-0394; FRL-9845-4] Revisions to the California State Implementation Plan, Antelope Valley Air Quality Management District and Ventura... rule. SUMMARY: EPA is proposing to approve revisions to the Antelope Valley Air Quality Management...
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Korea-United States Air Quality (KORUS-AQ) Campaign
NASA Technical Reports Server (NTRS)
Castellanos, Patricia; Da Silva, Arlindo; Longo-De Freitas, Karla
2017-01-01
The Korea-United States Air Quality (KORUS-AQ) campaign was an international cooperative field study based out of Osan Air Base, Songtan, South Korea (about 60 kilometers south of Seoul) in April-June 2016. A comprehensive suite of instruments capable of measuring atmospheric composition was deployed around the Korean peninsula on aircrafts, ships, and at ground sites in order to characterize local and transboundary pollution. The NASA Goddard Earth Observing System, version 5 (GEOS-5) forecast model was used for near real time meteorological and aerosol forecasting and flight planning during the KORUS-AQ campaign. Evaluation of GEOS-5 against observations from the campaign will help to identify inaccuracies in the models physical and chemical processes in this region within East Asia and lead to further developments of the modeling system.
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Cross-State Air Pollution Rule
The Cross-State Air Pollution Rule (CSAPR), requires states to significantly improve air quality by reducing power plant emissions that contribute to ozone and/or fine particle pollution in other states.
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-08-04
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... approve revisions to the South Coast Air Quality Management District (SCAQMD) portion of the California..., this action: Is not a ``significant regulatory action'' subject to review by the Office of Management...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-12-06
... the California State Implementation Plan, Feather River Air Quality Management District AGENCY... limited disapproval of revisions to the Feather River Air Quality Management District (FRAQMD) portion of..., Regulatory Planning and Review The Office of Management and Budget (OMB) has exempted this regulatory action...
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40 CFR 52.346 - Air quality monitoring requirements.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 3 2010-07-01 2010-07-01 false Air quality monitoring requirements. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Colorado § 52.346 Air quality monitoring... VIII Administrator, the State submitted a revised Air Quality Monitoring State Implementation Plan. The...
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40 CFR 52.346 - Air quality monitoring requirements.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 3 2012-07-01 2012-07-01 false Air quality monitoring requirements. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Colorado § 52.346 Air quality monitoring... VIII Administrator, the State submitted a revised Air Quality Monitoring State Implementation Plan. The...
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40 CFR 52.346 - Air quality monitoring requirements.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 3 2014-07-01 2014-07-01 false Air quality monitoring requirements. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Colorado § 52.346 Air quality monitoring... VIII Administrator, the State submitted a revised Air Quality Monitoring State Implementation Plan. The...
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40 CFR 52.346 - Air quality monitoring requirements.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 3 2013-07-01 2013-07-01 false Air quality monitoring requirements. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Colorado § 52.346 Air quality monitoring... VIII Administrator, the State submitted a revised Air Quality Monitoring State Implementation Plan. The...
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40 CFR 52.346 - Air quality monitoring requirements.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 3 2011-07-01 2011-07-01 false Air quality monitoring requirements. 52... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS Colorado § 52.346 Air quality monitoring... VIII Administrator, the State submitted a revised Air Quality Monitoring State Implementation Plan. The...
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ERIC Educational Resources Information Center
Environmental Science and Technology, 1972
1972-01-01
State plans for implementing air quality standards are evaluated together with problems in modeling procedures and enforcement. Monitoring networks, standards, air quality regions, and industrial problems are also discussed. (BL)
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Enabling Mobile Air Quality App Development with an AirNow API
NASA Astrophysics Data System (ADS)
Dye, T.; White, J. E.; Ludewig, S. A.; Dickerson, P.; Healy, A. N.; West, J. W.; Prince, L. A.
2013-12-01
The U.S. Environmental Protection Agency's (EPA) AirNow program works with over 130 participating state, local, and federal air quality agencies to obtain, quality control, and store real-time air quality observations and forecasts. From these data, the AirNow system generates thousands of maps and products each hour. Each day, information from AirNow is published online and in other media to assist the public in making health-based decisions related to air quality. However, an increasing number of people use mobile devices as their primary tool for obtaining information, and AirNow has responded to this trend by publishing an easy-to-use Web API that is useful for mobile app developers. This presentation will describe the various features of the AirNow application programming interface (API), including Representational State Transfer (REST)-type web services, file outputs, and RSS feeds. In addition, a web portal for the AirNow API will be shown, including documentation on use of the system, a query tool for configuring and running web services, and general information about the air quality data and forecasts available. Data published via the AirNow API includes corresponding Air Quality Index (AQI) levels for each pollutant. We will highlight examples of mobile apps that are using the AirNow API to provide location-based, real-time air quality information. Examples will include mobile apps developed for Minnesota ('Minnesota Air') and Washington, D.C. ('Clean Air Partners Air Quality'), and an app developed by EPA ('EPA AirNow').
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Operational air quality forecast guidance for the United States
NASA Astrophysics Data System (ADS)
Stajner, Ivanka; Lee, Pius; Tong, Daniel; Pan, Li; McQueen, Jeff; Huang, Jinaping; Djalalova, Irina; Wilczak, James; Huang, Ho-Chun; Wang, Jun; Stein, Ariel; Upadhayay, Sikchya
2016-04-01
NOAA provides operational air quality predictions for ozone and wildfire smoke over the United States (U.S.) and predictions of airborne dust over the contiguous 48 states at http://airquality.weather.gov. These predictions are produced using U.S. Environmental Protection Agency (EPA) Community Model for Air Quality (CMAQ) and NOAA's HYSPLIT model (Stein et al., 2015) with meteorological inputs from the North American Mesoscale Forecast System (NAM). The current efforts focus on improving test predictions of fine particulate matter (PM2.5) from CMAQ. Emission inputs for ozone and PM2.5 predictions include inventory information from the U.S. EPA and recently added contributions of particulate matter from intermittent wildfires and windblown dust that rely on near real-time information. Current testing includes refinement of the vertical grid structure in CMAQ and inclusion of contributions of dust transport from global sources into the U.S. domain using the NEMS Global Aerosol Capability (NGAC). The addition of wildfire smoke and dust contributions in CMAQ reduced model underestimation of PM2.5 in summertime. Wintertime overestimation of PM2.5 was reduced by suppressing emissions of soil particles when the terrain is covered by snow or ice. Nevertheless, seasonal biases and biases in the diurnal cycle of PM2.5 are still substantial. Therefore, a new bias correction procedure based on an analog ensemble approach was introduced (Djalalova et al., 2015). It virtually eliminates biases in monthly means or in the diurnal cycle, but it also reduces day-to-day variability in PM2.5 predictions. Refinements to the bias correction procedure are being developed. Upgrades for the representation of wildfire smoke emissions within the domain and from global sources are in testing. Another area of active development includes approaches to scale emission inventories for nitrogen oxides in order to reproduce recent changes observed by the AirNow surface monitoring network and by
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-06-01
... the California State Implementation Plan, South Coast Air Quality Management District AGENCY... approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California... action: Is not a ``significant regulatory action'' subject to review by the Office of Management and...
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ERIC Educational Resources Information Center
Everett Jones, Sherry; Doroski, Brenda; Glick, Sherry
2015-01-01
Nationally representative data from the 2012 School Health Policies and Practices Study examined whether state assistance on indoor air quality (IAQ) was associated with district-level policies and practices related to IAQ and integrated pest management (IPM). Districts in states that provided assistance on IAQ were more likely than districts not…
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Agriculture: Agriculture and Air Quality
Information on air emissions from agricultural practices, types of agricultural burning, air programs that may apply to agriculture, reporting requirements, and links to state and other federal air-quality information.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-05
... Air Quality Designations for the 2010 Sulfur Dioxide (SO[bdi2]) Primary National Ambient Air Quality... air quality designations for certain areas in the United States for the 2010 primary Sulfur Dioxide... of this document? III. What is sulfur dioxide? IV. What is the 2010 SO 2 NAAQS and what are the...
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Air Quality Criteria for Particulate Matter.
ERIC Educational Resources Information Center
National Air Pollution Control Administration (DHEW), Washington, DC.
To assist states in developing air quality standards, this book offers a review of literature related to atmospheric particulates and the development of criteria for air quality. It not only summarizes the current scientific knowledge of particulate air pollution, but points up the major deficiencies in that knowledge and the need for further…
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-08-08
...EPA is finalizing a limited approval and limited disapproval of a state implementation plan (SIP) revision submitted by the State of California on November 17, 2007, to address the ``transport SIP'' provisions of Clean Air Act (CAA) section 110(a)(2)(D)(i) for the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS or standards) and the 1997 fine particulate matter (PM2.5) NAAQS. Section 110(a)(2)(D)(i) of the CAA requires that each SIP contain, among other things, adequate measures prohibiting emissions of air pollutants in amounts which will interfere with any other State's measures required under title I, part C of the CAA to prevent significant deterioration of air quality. EPA is approving California's SIP revision with respect to those Districts that implement SIP- approved permit programs meeting the approval criteria and simultaneously disapproving California's SIP revision with respect to those Districts that do not implement SIP-approved permit programs meeting the approval criteria, as discussed in our May 31, 2011 proposed rule (76 FR 31263).
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Strosnider, Heather; Kennedy, Caitlin; Monti, Michele; Yip, Fuyuen
2017-06-23
The places in which persons live, work, and play can contribute to the development of adverse health outcomes. Understanding the differences in risk factors in various environments can help to explain differences in the occurrence of these outcomes and can be used to develop public health programs, interventions, and policies. Efforts to characterize urban and rural differences have largely focused on social and demographic characteristics. A paucity of national standardized environmental data has hindered efforts to characterize differences in the physical aspects of urban and rural areas, such as air and water quality. 2008-2012 for air quality and 2010-2015 for water quality. Since 2002, CDC's National Environmental Public Health Tracking Program has collaborated with federal, state, and local partners to gather standardized environmental data by creating national data standards, collecting available data, and disseminating data to be used in developing public health actions. The National Environmental Public Health Tracking Network (i.e., the tracking network) collects data provided by national, state, and local partners and includes 21 health outcomes, exposures, and environmental hazards. To assess environmental factors that affect health, CDC analyzed three air-quality measures from the tracking network for all counties in the contiguous United States during 2008-2012 and one water-quality measure for 26 states during 2010-2015. The three air-quality measures include 1) total number of days with fine particulate matter (PM 2.5 ) levels greater than the U.S. Environmental Protection Agency's (EPA's) National Ambient Air Quality Standards (NAAQS) for 24-hour average PM 2.5 (PM 2.5 days); 2) mean annual average ambient concentrations of PM 2.5 in micrograms per cubic meter (mean PM 2.5 ); and 3) total number of days with maximum 8-hour average ozone concentrations greater than the NAAQS (ozone days). The water-quality measure compared the annual mean
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40 CFR 52.96 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.96 Section 52.96 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Alaska Department of Environmental Conservation Air Quality... deterioration of air quality. (b) The requirements of sections 160 through 165 of the Clean Air Act are not met...
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Tree and forest effects on air quality and human health in the United States
David J. Nowak; Satoshi Hirabayashi; Allison Bodine; Eric Greenfield
2014-01-01
Trees remove air pollution by the interception of particulate matter on plant surfaces and the absorption of gaseous pollutants through the leaf stomata. However, the magnitude and value of the effects of trees and forests on air quality and human health across the United States remains unknown. Computer simulations with local environmental data reveal that trees and...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-10-25
...] Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revised Ambient Air Quality... State Implementation Plan (SIP). The revisions add ambient air quality standards and associated... Ambient Air Quality Standards (NAAQS) for PM 2.5 . EPA is approving these revisions in accordance with the...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-07-13
... Promulgation of Air Quality Implementation Plans; Pennsylvania; Regional Haze State Implementation Plan AGENCY... the Regional Haze State Implementation Plan (SIP) (hereafter RH SIP) revision submitted by the... anthropogenic impairment of visibility in mandatory Class I areas [[Page 41280
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NASA Astrophysics Data System (ADS)
Saari, R.; Selin, N. E.
2015-12-01
We examine the effect of state, regional, and national cooperation on the costs and air quality co-benefits of a policy to limit the carbon intensity of existing electricity generation. Electricity generation is a significant source of both greenhouse gases and air pollutant emissions that harm human health. Previous studies have shown that air quality co-benefits can be substantial compared to the costs of limiting carbon emissions in the energy system. The EPA's proposed Clean Power Plan seeks to impose carbon intensity limits for each state, but allows states to cooperate in order to meet combined limits. We explore how such cooperation might produce trade-offs between lower costs, widespread pollution reductions, and local reductions. We employ a new state-level model of the US energy system and economy to examine the costs and emissions as states reduce demand or deploy cleaner generation. We use an advanced air quality impacts modeling system, including SMOKE, CAMx, and BenMAP, to estimate health-related air quality co-benefits and compare these to costs under different levels of cooperation. We draw conclusions about the potential impacts of cooperation on economic welfare at various scales.
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40 CFR 52.96 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.96 Section 52.96 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Alaska Department of Environmental Conservation Air Quality... deterioration of air quality. The following regulations as in effect on April 1, 2010, are also approved as...
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40 CFR 52.96 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.96 Section 52.96 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Alaska Department of Environmental Conservation Air Quality... deterioration of air quality. The following regulations as in effect on April 1, 2010, are also approved as...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-08-13
... Promulgation of Air Quality Implementation Plans; Pennsylvania; Regional Haze State Implementation Plan...'s limited approval of Pennsylvania's Regional Haze State Implementation Plan (SIP). DATES: Effective... announcing our limited approval of Pennsylvania's Regional Haze SIP. In this document, we inadvertently...
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Air Quality Modeling | Air Quality Planning & Standards | US ...
2016-06-08
The basic mission of the Office of Air Quality Planning and Standards is to preserve and improve the quality of our nation's air. One facet of accomplishing this goal requires that new and existing air pollution sources be modeled for compliance with the National Ambient Air Quality Standards (NAAQS).
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40 CFR 52.683 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.683 Section 52.683 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Idaho Rules for Control of Air Pollution in Idaho, specifically... the Clean Air Act for preventing significant deterioration of air quality. (b) The requirements of...
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40 CFR 52.683 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.683 Section 52.683 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Idaho Rules for Control of Air Pollution in Idaho, specifically... the Clean Air Act for preventing significant deterioration of air quality. (b) The requirements of...
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40 CFR 52.683 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.683 Section 52.683 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Idaho Rules for Control of Air Pollution in Idaho, specifically... the Clean Air Act for preventing significant deterioration of air quality. (b) The requirements of...
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40 CFR 52.683 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.683 Section 52.683 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Idaho Rules for Control of Air Pollution in Idaho, specifically... Air Act for preventing significant deterioration of air quality. (b) The requirements of sections 160...
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40 CFR 52.96 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.96 Section 52.96 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Alaska Department of Environmental Conservation Air Quality... deterioration of air quality. The introductory paragraph to 18 AAC 50.040(h) as in effect on December 9, 2010 is...
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40 CFR 52.96 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.96 Section 52.96 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Alaska Department of Environmental Conservation Air Quality... deterioration of air quality. The introductory paragraph to 18 AAC 50.040(h) as in effect on December 9, 2010 is...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-05-04
...EPA is proposing to approve revisions to the Antelope Valley Air Quality Management District (AVAQMD), Eastern Kern Air Pollution Control District (EKAPCD), and Santa Barbara County Air Pollution Control District (SBCAPCD) portions of the California State Implementation Plan (SIP). We are proposing to approve revisions to local rules that define terms used in other air pollution regulations in these areas and a rule rescission that address Petroleum Coke Calcining Operations--Oxides of Sulfur, under the Clean Air Act as amended in 1990 (CAA or the Act).
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-17
... Promulgation of Air Quality Implementation Plans; Delaware, State Board Requirements AGENCY: Environmental... revision to the Delaware State Implementation Plan (SIP) submitted by the Delaware Department of Natural Resources and Environmental Control (DNREC) on January 11, 2013. The SIP revision addresses requirements of...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-01
...EPA is proposing to approve revisions to the Antelope Valley Air Quality Management District (AVAQMD) and San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) portions of the California State Implementation Plan (SIP). These revisions concern negative declarations for volatile organic compound (VOC) and oxides of sulfur source categories. We are proposing to approve these negative declarations under the Clean Air Act as amended in 1990 (CAA or the Act).
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The State of Ambient Air Quality of Jeddah, Saudi Arabia
NASA Astrophysics Data System (ADS)
Hussain, M. M.; Aburizaiza, O. S.; Khwaja, H. A.; Siddique, A.; Nayebare, S. R.; Zeb, J.; Blake, D. R.
2014-12-01
Ambient air pollution in major cities of Saudi Arabia is a substantial environmental and health concern. A study was undertaken to assess the air quality of Jeddah, Saudi Arabia by the analysis of respirable particulate matter (PM2.5), black carbon (BC), trace metals (Na, Mg, Al, Si, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Br, Sr, Cd, Sb, and Pb), and water-soluble ions (F-, Cl-, NO3-, SO42-, C2O42-, and NH42+). Sulfur and BC mass concentration ranged 0.99 - 7.39 μg/m3 and 0.70 - 3.09 μg/m3, respectively, while the PM2.5 mass concentration ranged 23 - 186 μg/m3. Maximum BC contribution to PM2.5 was 5.6%. Atmospheric PM2.5 concentrations were well above the 24 h WHO guideline of 20 μg/m3. Air Quality Index (AQI) indicates that there were 8% days of moderate air quality, 28% days of unhealthy air quality for sensitive groups, 55% days of unhealthy air quality, and 9% days of very unhealthy air quality during the study period. Sulfate SO42- dominated the identifiable components. The major contributors to PM2.5 were soil and crustal material; vehicle emissions (black carbon factor); and fuel oil combustion in industries (sulfur factor), according to the Positive Matrix Factorization (PMF). This study highlights the importance of focusing control strategies not only on reducing PM concentration, but also on the reduction of toxic components of the PM, to most effectively protect human health and the environment.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-11
...EPA is taking direct final action to approve revisions to the Antelope Valley Air Quality Management District (AVAQMD) and Monterey Bay Unified Air Pollution Control District (MBUAPCD) and Santa Barbara County Air Pollution Control District (SBCAPCD) portions of the California State Implementation Plan (SIP). Under authority of the Clean Air Act as amended in 1990 (CAA or the Act), we are approving local rules that address emission statements for AVAQMD, rule rescissions that addresses public records for MBUAPCD, and define terms for SBCAPCD.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-11
...EPA is proposing to approve revisions to the Antelope Valley Air Quality Management District (AVAQMD), Monterey Bay Unified Air Pollution Control District (MBUAPCD) and Santa Barbara County Air Pollution Control District (SCAPCD) portions of the California State Implementation Plan (SIP). We are proposing to approve revisions local rules that address emission statements for AVAQMD, rule rescissions that address public records for MBUAPCD, and define terms for SBCAPCD, under the Clean Air Act as amended in 1990 (CAA or the Act).
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Enhancing indoor air quality -The air filter advantage.
Vijayan, Vannan Kandi; Paramesh, Haralappa; Salvi, Sundeep Santosh; Dalal, Alpa Anil Kumar
2015-01-01
Air pollution has become the world's single biggest environmental health risk, linked to around 7 million deaths in 2012 according to a recent World Health Organisation (WHO) report. The new data further reveals a stronger link between, indoor and outdoor air pollution exposure and cardiovascular diseases, such as strokes and ischemic heart disease, as well as between air pollution and cancer. The role of air pollution in the development of respiratory diseases, including acute respiratory infections and chronic obstructive pulmonary diseases, is well known. While both indoor and outdoor pollution affect health, recent statistics on the impact of household indoor pollutants (HAP) is alarming. The WHO factsheet on HAP and health states that 3.8 million premature deaths annually - including stroke, ischemic heart disease, chronic obstructive pulmonary disease (COPD) and lung cancer are attributed to exposure to household air pollution. Use of air cleaners and filters are one of the suggested strategies to improve indoor air quality. This review discusses the impact of air pollutants with special focus on indoor air pollutants and the benefits of air filters in improving indoor air quality.
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NASA Astrophysics Data System (ADS)
Shen, L.; Mickley, L. J.
2016-12-01
Atlantic sea surface temperatures have a significant influence on the summertime meteorology and air quality in the eastern United States. In this study, we investigate the effect of the Atlantic Multidecadal Oscillation (AMO) on two key air pollutants, surface ozone and PM2.5, over the eastern United States. The shift of AMO from cold to warm phase increases surface air temperatures by 0.5 K across the East and reduces precipitation, resulting in a warmer and drier summer. By applying observed, present-day relationships between these pollutants and meteorological variables to a variety of observations and historical reanalysis datasets, we calculate the impacts of AMO on U.S. air quality. Our study reveals a multidecadal variability in mean summertime (JJA) maximum daily 8-hour (MDA8) ozone and surface PM2.5 concentrations in the eastern United States. In one-half cycle ( 30 years) of the AMO from negative to positive phase with constant anthropogenic emissions, JJA MDA8 ozone concentrations increase by 1-3 ppbv in the Northeast and 2-5 ppbv in the Great Plains; JJA PM2.5 concentrations increase by 0.8-1.2 μg m-3 in the Northeast and Southeast. The resulting impact on mortality rates is 4000 excess deaths per half cycle of AMO. We suggest that a complete picture of air quality management in coming decades requires consideration of the AMO influence.
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EXAMINING THE IMPACT OF CLIMATE CHANGE ON REGIONAL AIR QUALITY OVER THE UNITED STATES
This presentation summarizes recent results produced in support of the assessment of climate change impacts on ozone and particulate matter over the continental United States. Preliminary findings of climate scenario, meteorologically-drive emissions and air quality simulation a...
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40 CFR 52.683 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.683 Section 52.683 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The State of Idaho Rules for Control of Air Pollution in Idaho, specifically... quality. (b) The requirements of sections 160 through 165 of the Clean Air Act are not met for Indian...
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Protecting wilderness air quality in the United States
K. A. Tonnessen
2000-01-01
Federal land managers are responsible for protecting air quality-related values (AQRVs) in parks and wilderness areas from air pollution damage or impairment. Few, if any, class 1 areas are unaffected by regional and global pollutants, such as visibility-reducing particles, ozone and deposition of sulfur (S), nitrogen (N) and toxics. This paper lays out the basic...
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Air quality and human health impacts of grasslands and shrublands in the United States
NASA Astrophysics Data System (ADS)
Gopalakrishnan, Varsha; Hirabayashi, Satoshi; Ziv, Guy; Bakshi, Bhavik R.
2018-06-01
Vegetation including canopy, grasslands, and shrublands can directly sequester pollutants onto the plant surface, resulting in an improvement in air quality. Until now, several studies have estimated the pollution removal capacity of canopy cover at the level of a county, but no such work exists for grasslands and shrublands. This work quantifies the air pollution removal capacity of grasslands and shrublands at the county-level in the United States and estimates the human health benefits associated with pollution removal using the i-Tree Eco model. Sequestration of pollutants is estimated based on the Leaf Area Index (LAI) obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) derived dataset estimates of LAI and the percentage land cover obtained from the National Land Cover Database (NLCD) for the year 2010. Calculation of pollution removal capacity using local environmental data indicates that grasslands and shrublands remove a total of 6.42 million tonnes of air pollutants in the United States and the associated monetary benefits total 268 million. Human health impacts and associated monetary value due to pollution removal was observed to be significantly high in urban areas indicating that grasslands and shrublands are equally critical as canopy in improving air quality and human health in urban regions.
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77 FR 30087 - Air Quality Designations for the 2008 Ozone National Ambient Air Quality Standards
Federal Register 2010, 2011, 2012, 2013, 2014
2012-05-21
...This rule establishes initial air quality designations for most areas in the United States, including areas of Indian country, for the 2008 primary and secondary national ambient air quality standards (NAAQS) for ozone. The designations for several counties in Illinois, Indiana, and Wisconsin that the EPA is considering for inclusion in the Chicago nonattainment area will be designated in a subsequent action, no later than May 31, 2012. Areas designated as nonattainment are also being classified by operation of law according to the severity of their air quality problems. The classification categories are Marginal, Moderate, Serious, Severe, and Extreme. The EPA is establishing the air quality thresholds that define the classifications in a separate rule that the EPA is signing and publishing in the Federal Register on the same schedule as these designations. In accordance with that separate rule, six nonattainment areas in California are being reclassified to a higher classification.
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40 CFR 52.2233 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2233 Section 52.2233 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a)(1) Paragraph 1200-3-9-.01(4)-(0)-2. of Tennessee's regulations... requesting innovative technology waivers which would significantly impact air quality in adjacent states. (2...
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40 CFR 52.2233 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2233 Section 52.2233 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a)(1) Paragraph 1200-3-9-.01(4)-(0)-2. of Tennessee's regulations... requesting innovative technology waivers which would significantly impact air quality in adjacent states. (2...
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40 CFR 52.2233 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2233 Section 52.2233 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a)(1) Paragraph 1200-3-9-.01(4)-(0)-2. of Tennessee's regulations... requesting innovative technology waivers which would significantly impact air quality in adjacent states. (2...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-20
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2011-0131, FRL-9317-9] Approval and Promulgation of Air Quality Implementation Plans; State of California; Regional Haze State Implementation Plan and Interstate Transport Plan; Interference With Visibility Requirement Correction In rule document...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-06-19
... Promulgation of Air Quality Implementation Plans; State of Utah; Revisions To Open Burning Regulations AGENCY... Emission Standards: General Burning authorizes the State to extend the time period for open burning. EPA is... Burning. This rule contains the following provisions: definitions and exclusions, community waste disposal...
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40 CFR 52.270 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 83-01, 5/6/83. (2) The PSD rules for North Coast Unified Air Quality Management District are approved... part of the State plan for California for the North Coast Unified Air Quality Management District for... quality. 52.270 Section 52.270 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR...
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40 CFR 51.860 - Mitigation of air quality impacts.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 2 2010-07-01 2010-07-01 false Mitigation of air quality impacts. 51... Federal Actions to State or Federal Implementation Plans § 51.860 Mitigation of air quality impacts. Link... mitigate air quality impacts must be identified and the process for implementation and enforcement of such...
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Everett Jones, Sherry; Doroski, Brenda; Glick, Sherry
2015-12-01
Nationally representative data from the 2012 School Health Policies and Practices Study examined whether state assistance on indoor air quality (IAQ) was associated with district-level policies and practices related to IAQ and integrated pest management (IPM). Districts in states that provided assistance on IAQ were more likely than districts not in such states to (1) have an IAQ management program (p < .001); (2) require schools to conduct periodic inspections of the heating, ventilation, and air conditioning system (p < .05); of the building for cracks, leaks, or past water damage (p < .01); for mold (p < .01); for clutter that prevents effective cleaning and maintenance (p < .05); of the plumbing system (p < .01); and for condensation in and around school facilities (p < .001); (3) have an engine idling reduction program ( < .001); (4) have a policy to purchase low-emitting products (p < .05); and (5) require IPM strategies (p < .05). Increasing the number of states that provide IAQ-related assistance to school districts and schools may improve school IAQ. © The Author(s) 2015.
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Air Quality Implementation Plans
States must develop plans to attain and maintain air quality standards. These plans, known as SIPs, are submitted to EPA for approval. This web site contains information about this process and the current status of the submittals.
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Increased use of ethanol in the United States fuel supply will impact emissions and ambient concentrations of greenhouse gases, “criteria” pollutants for which the U. S. EPA sets ambient air quality standards, and a variety of air toxic compounds. This paper focuses on impacts of...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-23
... Promulgation of Air Quality Implementation Plans; West Virginia; Regional Haze State Implementation Plan AGENCY... limited disapproval of West Virginia's Regional Haze State Implementation Plan (SIP) revision. EPA is... mandatory Class I areas through a regional haze program. EPA is also approving this revision as meeting the...
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Kennedy, Caitlin; Monti, Michele; Yip, Fuyuen
2017-01-01
Problem/Condition The places in which persons live, work, and play can contribute to the development of adverse health outcomes. Understanding the differences in risk factors in various environments can help to explain differences in the occurrence of these outcomes and can be used to develop public health programs, interventions, and policies. Efforts to characterize urban and rural differences have largely focused on social and demographic characteristics. A paucity of national standardized environmental data has hindered efforts to characterize differences in the physical aspects of urban and rural areas, such as air and water quality. Reporting Period 2008–2012 for air quality and 2010–2015 for water quality. Description of System Since 2002, CDC’s National Environmental Public Health Tracking Program has collaborated with federal, state, and local partners to gather standardized environmental data by creating national data standards, collecting available data, and disseminating data to be used in developing public health actions. The National Environmental Public Health Tracking Network (i.e., the tracking network) collects data provided by national, state, and local partners and includes 21 health outcomes, exposures, and environmental hazards. To assess environmental factors that affect health, CDC analyzed three air-quality measures from the tracking network for all counties in the contiguous United States during 2008–2012 and one water-quality measure for 26 states during 2010–2015. The three air-quality measures include 1) total number of days with fine particulate matter (PM2.5) levels greater than the U.S. Environmental Protection Agency’s (EPA’s) National Ambient Air Quality Standards (NAAQS) for 24-hour average PM2.5 (PM2.5 days); 2) mean annual average ambient concentrations of PM2.5 in micrograms per cubic meter (mean PM2.5); and 3) total number of days with maximum 8-hour average ozone concentrations greater than the NAAQS (ozone days
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-09-25
... Promulgation of Air Quality Implementation Plans; State of Utah; Revisions To Open Burning Regulations AGENCY... Emission Standards: General Burning authorizes the State to extend the time period for open burning. EPA is... submitted a SIP revision to Rule R307-202 Emission Standards: General Burning. This rule contains the...
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40 CFR 52.2233 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 4 2011-07-01 2011-07-01 false Significant deterioration of air quality. 52.2233 Section 52.2233 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... requesting innovative technology waivers which would significantly impact air quality in adjacent states. (2...
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40 CFR 52.995 - Enhanced ambient air quality monitoring.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 3 2010-07-01 2010-07-01 false Enhanced ambient air quality monitoring. 52.995 Section 52.995 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... air quality monitoring. (a) The Governor of the State of Louisiana submitted the photochemical...
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40 CFR 52.995 - Enhanced ambient air quality monitoring.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 3 2014-07-01 2014-07-01 false Enhanced ambient air quality monitoring. 52.995 Section 52.995 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... air quality monitoring. (a) The Governor of the State of Louisiana submitted the photochemical...
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40 CFR 52.995 - Enhanced ambient air quality monitoring.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 3 2012-07-01 2012-07-01 false Enhanced ambient air quality monitoring. 52.995 Section 52.995 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... air quality monitoring. (a) The Governor of the State of Louisiana submitted the photochemical...
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40 CFR 52.995 - Enhanced ambient air quality monitoring.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 3 2013-07-01 2013-07-01 false Enhanced ambient air quality monitoring. 52.995 Section 52.995 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... air quality monitoring. (a) The Governor of the State of Louisiana submitted the photochemical...
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40 CFR 52.995 - Enhanced ambient air quality monitoring.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 3 2011-07-01 2011-07-01 false Enhanced ambient air quality monitoring. 52.995 Section 52.995 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... air quality monitoring. (a) The Governor of the State of Louisiana submitted the photochemical...
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A state of the art regarding urban air quality prediction models
NASA Astrophysics Data System (ADS)
Croitoru, Cristiana; Nastase, Ilinca
2018-02-01
Urban pollution represents an increasing risk to residents of urban regions, particularly in large, over-industrialized cities knowing that the traffic is responsible for more than 25% of air gaseous pollutants and dust particles. Air quality modelling plays an important role in addressing air pollution control and management approaches by providing guidelines for better and more efficient air quality forecasting, along with smart monitoring sensor networks. The advances in technology regarding simulations, forecasting and monitoring are part of the new smart cities which offers a healthy environment for their occupants.
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COMMUNITY MULTISCALE AIR QUALITY MODELING SYSTEM (ONE ATMOSPHERE)
This task supports ORD's strategy by providing responsive technical support of EPA's mission and provides credible state of the art air quality models and guidance. This research effort is to develop and improve the Community Multiscale Air Quality (CMAQ) modeling system, a mu...
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Enhancing indoor air quality –The air filter advantage
Vijayan, Vannan Kandi; Paramesh, Haralappa; Salvi, Sundeep Santosh; Dalal, Alpa Anil Kumar
2015-01-01
Air pollution has become the world's single biggest environmental health risk, linked to around 7 million deaths in 2012 according to a recent World Health Organisation (WHO) report. The new data further reveals a stronger link between, indoor and outdoor air pollution exposure and cardiovascular diseases, such as strokes and ischemic heart disease, as well as between air pollution and cancer. The role of air pollution in the development of respiratory diseases, including acute respiratory infections and chronic obstructive pulmonary diseases, is well known. While both indoor and outdoor pollution affect health, recent statistics on the impact of household indoor pollutants (HAP) is alarming. The WHO factsheet on HAP and health states that 3.8 million premature deaths annually - including stroke, ischemic heart disease, chronic obstructive pulmonary disease (COPD) and lung cancer are attributed to exposure to household air pollution. Use of air cleaners and filters are one of the suggested strategies to improve indoor air quality. This review discusses the impact of air pollutants with special focus on indoor air pollutants and the benefits of air filters in improving indoor air quality. PMID:26628762
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EPA is taking final rulemaking action to approve, as part of the State Implementation Plan (SIP) for the State of Arizona, the second 10-year maintenance plan for the Douglas maintenance area for the 1971 National Ambient Air Quality Standards for SO2.
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-11-29
... Promulgation of Air Quality Implementation Plans; Indiana; Clean Air Interstate Rule AGENCY: Environmental... State Implementation Plan (SIP) under the Clean Air Act (CAA). The State has submitted amendments to the Indiana Administrative Code (IAC), which supplement Indiana's Clean Air Interstate Rule (CAIR), for which...
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School policies and practices that improve indoor air quality.
Everett Jones, Sherry; Smith, Alisa M; Wheeler, Lani S; McManus, Tim
2010-06-01
To determine whether schools with a formal indoor air quality management program were more likely than schools without a formal program to have policies and practices that promote superior indoor air quality. This study analyzed school-level data from the 2006 School Health Policies and Programs Study, a national study of school health programs and policies at the state, district, and school levels. Using chi-square analyses, the rates of policies and practices that promote indoor air quality were compared between schools with and schools without a formal indoor air quality program. The findings of this study show that 51.4% of schools had a formal indoor air quality management program, and that those schools were significantly more likely than were schools without a program to have policies and use strategies to promote superior indoor air quality. These findings suggest that schools with a formal indoor air quality program are more likely support policies and engage in practices that promote superior indoor air quality.
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-19
... Promulgation of Air Quality Implementation Plans; Delaware; Regional Haze State Implementation Plan AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. SUMMARY: EPA is approving the Delaware Regional Haze... visibility in mandatory Class I areas through a regional haze program. EPA is also approving this revision...
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NASA Astrophysics Data System (ADS)
Abel, David; Holloway, Tracey; Harkey, Monica; Rrushaj, Arber; Brinkman, Greg; Duran, Phillip; Janssen, Mark; Denholm, Paul
2018-02-01
We evaluate how fine particulate matter (PM2.5) and precursor emissions could be reduced if 17% of electricity generation was replaced with solar photovoltaics (PV) in the Eastern United States. Electricity generation is simulated using GridView, then used to scale electricity-sector emissions of sulfur dioxide (SO2) and nitrogen oxides (NOX) from an existing gridded inventory of air emissions. This approach offers a novel method to leverage advanced electricity simulations with state-of-the-art emissions inventories, without necessitating recalculation of emissions for each facility. The baseline and perturbed emissions are input to the Community Multiscale Air Quality Model (CMAQ version 4.7.1) for a full accounting of time- and space-varying air quality changes associated with the 17% PV scenario. These results offer a high-value opportunity to evaluate the reduced-form AVoided Emissions and geneRation Tool (AVERT), while using AVERT to test the sensitivity of results to changing base-years and levels of solar integration. We find that average NOX and SO2 emissions across the region decrease 20% and 15%, respectively. PM2.5 concentrations decreased on average 4.7% across the Eastern U.S., with nitrate (NO3-) PM2.5 decreasing 3.7% and sulfate (SO42-) PM2.5 decreasing 9.1%. In the five largest cities in the region, we find that the most polluted days show the most significant PM2.5 decrease under the 17% PV generation scenario, and that the greatest benefits are accrued to cities in or near the Ohio River Valley. We find summer health benefits from reduced PM2.5 exposure estimated as 1424 avoided premature deaths (95% Confidence Interval (CI): 284 deaths, 2 732 deaths) or a health savings of 13.1 billion (95% CI: 0.6 billion, 43.9 billion) These results highlight the potential for renewable energy as a tool for air quality managers to support current and future health-based air quality regulations.
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DOE Office of Scientific and Technical Information (OSTI.GOV)
Abel, David; Holloway, Tracey; Harkey, Monica
We evaluate how fine particulate matter (PM2.5) and precursor emissions could be reduced if 17% of electricity generation was replaced with solar photovoltaics (PV) in the Eastern United States. Electricity generation is simulated using GridView, then used to scale electricity-sector emissions of sulfur dioxide (SO2) and nitrogen oxides (NOX) from an existing gridded inventory of air emissions. This approach offers a novel method to leverage advanced electricity simulations with state-of-the-art emissions inventories, without necessitating recalculation of emissions for each facility. The baseline and perturbed emissions are input to the Community Multiscale Air Quality Model (CMAQ version 4.7.1) for a fullmore » accounting of time- and space-varying air quality changes associated with the 17% PV scenario. These results offer a high-value opportunity to evaluate the reduced-form AVoided Emissions and geneRation Tool (AVERT), while using AVERT to test the sensitivity of results to changing base-years and levels of solar integration. We find that average NOX and SO2 emissions across the region decrease 20% and 15%, respectively. PM2.5 concentrations decreased on average 4.7% across the Eastern U.S., with nitrate (NO3-) PM2.5 decreasing 3.7% and sulfate (SO42-) PM2.5 decreasing 9.1%. In the five largest cities in the region, we find that the most polluted days show the most significant PM2.5 decrease under the 17% PV generation scenario, and that the greatest benefits are accrued to cities in or near the Ohio River Valley. We find summer health benefits from reduced PM2.5 exposure estimated as 1424 avoided premature deaths (95% Confidence Interval (CI): 284 deaths, 2 732 deaths) or a health savings of $13.1 billion (95% CI: $0.6 billion, $43.9 billion) These results highlight the potential for renewable energy as a tool for air quality managers to support current and future health-based air quality regulations.« less
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-09-04
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0236; FRL-9711-2] Revisions to the California State Implementation Plan, South Coast Air Quality Management District (SCAQMD) AGENCY... ``significant regulatory action'' subject to review by the Office of Management and Budget under Executive Order...
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Long-term Changes in Extreme Air Pollution Meteorology and the Implications for Air Quality.
Hou, Pei; Wu, Shiliang
2016-03-31
Extreme air pollution meteorological events, such as heat waves, temperature inversions and atmospheric stagnation episodes, can significantly affect air quality. Based on observational data, we have analyzed the long-term evolution of extreme air pollution meteorology on the global scale and their potential impacts on air quality, especially the high pollution episodes. We have identified significant increasing trends for the occurrences of extreme air pollution meteorological events in the past six decades, especially over the continental regions. Statistical analysis combining air quality data and meteorological data further indicates strong sensitivities of air quality (including both average air pollutant concentrations and high pollution episodes) to extreme meteorological events. For example, we find that in the United States the probability of severe ozone pollution when there are heat waves could be up to seven times of the average probability during summertime, while temperature inversions in wintertime could enhance the probability of severe particulate matter pollution by more than a factor of two. We have also identified significant seasonal and spatial variations in the sensitivity of air quality to extreme air pollution meteorology.
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EPA AirNow Satellite Data Processor (ASDP) for Improving Air Quality Information
NASA Astrophysics Data System (ADS)
White, J. E.; Dickerson, P.; Szykman, J.; Chu, D.; Kondragunta, S.; Zhang, H.; Martin, R. V.; van Donkelaar, A.; Pasch, A. N.; Dye, T. S.; Zahn, P. H.; Haderman, M. D.; DeWinter, J. L.
2012-12-01
The US Environmental Protection Agency (EPA) AirNow program provides Air Quality Index (AQI) information to the public, decision-makers, researchers and the media (data and forecasts) mainly for ozone and PM2.5 (particles smaller than 2.5 μm in median diameter). EPA wants to provide the best information available to the public and integrating NASA satellite-derived surface PM2.5 concentrations with ground-level PM2.5 observations has proved promising. The AirNow Satellite Data Processor (ASDP) uses daily PM2.5 estimates and uncertainties derived from average Aqua and Terra MODerate resolution Imaging Spectrometer (MODIS) AOD in near-real-time over the United States and fuses the results with observed PM2.5 measurements to create several air quality products for evaluation. In addition to the description of the AirNow program and the AirNow ASDP, several case studies will be presented to show the value that NASA satellite information adds to maps of air quality.
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ERIC Educational Resources Information Center
Malcolm, Judith
Asserting that in Maine and across the nation, school buildings are becoming increasingly plagued with indoor air quality (IAQ) problems which contribute to a variety of illnesses in children and adults, this report from a Maine state legislative task force identifies appropriate policies and identifies actions necessary for the prevention and…
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U.S. EPA Environmental Quality Index - Air Domain
This is an invited presentation by Region 5, Air Office, who asked me to provide an overview of the Air Domain and health results associated with the Air Domain of the Environmental Quality Index. Region 5 is hosting an Air Toxics meeting for its member states (Ohio, Michigan, I...
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DEVELOPMENT AND ANALYSIS OF AIR QUALITY MODELING SIMULATIONS FOR HAZARDOUS AIR POLLUTANTS
The concentrations of five hazardous air pollutants were simulated using the Community Multi Scale Air Quality (CMAQ) modeling system. Annual simulations were performed over the continental United States for the entire year of 2001 to support human exposure estimates. Results a...
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Evaluating the effectiveness of air quality interventions.
van Erp, Annemoon M M; O'Keefe, Robert; Cohen, Aaron J; Warren, Jane
2008-01-01
Evaluating the extent to which air quality regulations improve public health--sometimes referred to as accountability--is part of an emerging effort to assess the effectiveness of environmental regulatory policies. Air quality has improved substantially in the United States and Western Europe in recent decades, with far less visible pollution and decreasing concentrations of several major pollutants. In large part, these gains were achieved through increasingly stringent air quality regulations. The costs associated with compliance and, importantly, the need to ensure that the regulations are achieving the intended public health benefits underscore the importance of accountability research. To date, accountability research has emphasized measuring the effects of actions already taken to improve air quality. Such research may also contribute to estimating the burden of disease that might be avoided in the future if certain actions are taken. The Health Effects Institute (HEI) currently funds eight ongoing studies on accountability, which cover near-term interventions to improve air quality including (1) a ban on the sale of coal, (2) replacing old wood stoves with cleaner ones, (3) decreasing sulfur content in fuel, (4) measures to reduce traffic, and (5) longer term, wide-ranging actions or events (such as complex changes associated with the reunification of Germany). HEI is also funding the development of methods and research to assess regulations that are implemented incrementally over extended periods of time, such as Title IV of the 1990 Clean Air Act Amendments, which reduces sulfur dioxide emissions from power plants in the eastern United States.
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Morris, Ralph E; McNally, Dennis E; Tesche, Thomas W; Tonnesen, Gail; Boylan, James W; Brewer, Patricia
2005-11-01
The Visibility Improvement State and Tribal Association of the Southeast (VISTAS) is one of five Regional Planning Organizations that is charged with the management of haze, visibility, and other regional air quality issues in the United States. The VISTAS Phase I work effort modeled three episodes (January 2002, July 1999, and July 2001) to identify the optimal model configuration(s) to be used for the 2002 annual modeling in Phase II. Using model configurations recommended in the Phase I analysis, 2002 annual meteorological (Mesoscale Meterological Model [MM5]), emissions (Sparse Matrix Operator Kernal Emissions [SMOKE]), and air quality (Community Multiscale Air Quality [CMAQ]) simulations were performed on a 36-km grid covering the continental United States and a 12-km grid covering the Eastern United States. Model estimates were then compared against observations. This paper presents the results of the preliminary CMAQ model performance evaluation for the initial 2002 annual base case simulation. Model performance is presented for the Eastern United States using speciated fine particle concentration and wet deposition measurements from several monitoring networks. Initial results indicate fairly good performance for sulfate with fractional bias values generally within +/-20%. Nitrate is overestimated in the winter by approximately +50% and underestimated in the summer by more than -100%. Organic carbon exhibits a large summer underestimation bias of approximately -100% with much improved performance seen in the winter with a bias near zero. Performance for elemental carbon is reasonable with fractional bias values within +/- 40%. Other fine particulate (soil) and coarse particular matter exhibit large (80-150%) overestimation in the winter but improved performance in the summer. The preliminary 2002 CMAQ runs identified several areas of enhancements to improve model performance, including revised temporal allocation factors for ammonia emissions to improve
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NASA Astrophysics Data System (ADS)
Garland, R. M.; Naidoo, M.; Sibiya, B.; Naidoo, S.; Bird, T.; von Gruenewaldt, R.; Liebenberg-Enslin, H.; Nekhwalivhe, M.; Netshandama, J.; Mahlatji, M.
2017-12-01
Ambient air pollution levels are regulated in South Africa; however in many areas pollution concentrations exceed these levels. The South African Air Quality Act also stipulates that government across all levels must have Air Quality Management Plans (AQMP) in place that outline the current state of air quality and emissions, as well as the implementable plan to manage, and where necessary improve, air quality. Historically, dispersion models have been used to support air quality management decisions, including in AQMPs. However, with the focus of air quality management shifting from focusing on industrial point sources to a more integrated and holistic management of all sources, chemical transport models are needed. CAMx was used in the review and development of the City of Johannesburg's AQMP to simulate hot spots of air pollution, as well as to model intervention scenarios. As the pollutants of concern in Johannesburg are ozone and particulate matter, it is critical to use a model that can simulate chemistry. CAMx was run at 1 km with a locally derived emissions inventory for 2014. The sources of pollution in the City are diverse (including, industrial, vehicles, domestic burning, natural), and many sources have large uncertainties in estimating emissions due to lack of necessary data and local emission factors. These uncertainties, together with a lack of measurements to validate the model against, hinder the performance of the model to simulate air quality and thus inform air quality management. However, as air quality worsens in Africa, it is critical for decision makers to have a strong evidence base on the state of air quality and impact of interventions in order to improve air quality effectively. This presentation will highlight the findings from using a chemical transport model for air quality management in the largest city in South Africa, the use and limitations of these for decision-makers, and proposed way forward.
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The effects of global change upon United States air quality
NASA Astrophysics Data System (ADS)
Gonzalez-Abraham, R.; Chung, S. H.; Avise, J.; Lamb, B.; Salathé, E. P., Jr.; Nolte, C. G.; Loughlin, D.; Guenther, A.; Wiedinmyer, C.; Duhl, T.; Zhang, Y.; Streets, D. G.
2015-11-01
To understand more fully the effects of global changes on ambient concentrations of ozone and particulate matter with aerodynamic diameter smaller than 2.5 μm (PM2.5) in the United States (US), we conducted a comprehensive modeling effort to evaluate explicitly the effects of changes in climate, biogenic emissions, land use and global/regional anthropogenic emissions on ozone and PM2.5 concentrations and composition. Results from the ECHAM5 global climate model driven with the A1B emission scenario from the Intergovernmental Panel on Climate Change (IPCC) were downscaled using the Weather Research and Forecasting (WRF) model to provide regional meteorological fields. We developed air quality simulations using the Community Multiscale Air Quality Model (CMAQ) chemical transport model for two nested domains with 220 and 36 km horizontal grid cell resolution for a semi-hemispheric domain and a continental United States (US) domain, respectively. The semi-hemispheric domain was used to evaluate the impact of projected global emissions changes on US air quality. WRF meteorological fields were used to calculate current (2000s) and future (2050s) biogenic emissions using the Model of Emissions of Gases and Aerosols from Nature (MEGAN). For the semi-hemispheric domain CMAQ simulations, present-day global emissions inventories were used and projected to the 2050s based on the IPCC A1B scenario. Regional anthropogenic emissions were obtained from the US Environmental Protection Agency National Emission Inventory 2002 (EPA NEI2002) and projected to the future using the MARKet ALlocation (MARKAL) energy system model assuming a business as usual scenario that extends current decade emission regulations through 2050. Our results suggest that daily maximum 8 h average ozone (DM8O) concentrations will increase in a range between 2 to 12 parts per billion (ppb) across most of the continental US. The highest increase occurs in the South, Central and Midwest regions of the US due to
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Emissions from oil and gas operations in the United States and their air quality implications.
Allen, David T
2016-06-01
The energy supply infrastructure in the United States has been changing dramatically over the past decade. Increased production of oil and natural gas, particularly from shale resources using horizontal drilling and hydraulic fracturing, made the United States the world's largest producer of oil and natural gas in 2014. This review examines air quality impacts, specifically, changes in greenhouse gas, criteria air pollutant, and air toxics emissions from oil and gas production activities that are a result of these changes in energy supplies and use. National emission inventories indicate that volatile organic compound (VOC) and nitrogen oxide (NOx) emissions from oil and gas supply chains in the United States have been increasing significantly, whereas emission inventories for greenhouse gases have seen slight declines over the past decade. These emission inventories are based on counts of equipment and operational activities (activity factors), multiplied by average emission factors, and therefore are subject to uncertainties in these factors. Although uncertainties associated with activity data and missing emission source types can be significant, multiple recent measurement studies indicate that the greatest uncertainties are associated with emission factors. In many source categories, small groups of devices or sites, referred to as super-emitters, contribute a large fraction of emissions. When super-emitters are accounted for, multiple measurement approaches, at multiple scales, produce similar results for estimated emissions. Challenges moving forward include identifying super-emitters and reducing their emission magnitudes. Work done to date suggests that both equipment malfunction and operational practices can be important. Finally, although most of this review focuses on emissions from energy supply infrastructures, the regional air quality implications of some coupled energy production and use scenarios are examined. These case studies suggest that both
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The Economic Value of Air Quality Forecasting
NASA Astrophysics Data System (ADS)
Anderson-Sumo, Tasha
Both long-term and daily air quality forecasts provide an essential component to human health and impact costs. According the American Lung Association, the estimated current annual cost of air pollution related illness in the United States, adjusted for inflation (3% per year), is approximately $152 billion. Many of the risks such as hospital visits and morality are associated with poor air quality days (where the Air Quality Index is greater than 100). Groups such as sensitive groups become more susceptible to the resulting conditions and more accurate forecasts would help to take more appropriate precautions. This research focuses on evaluating the utility of air quality forecasting in terms of its potential impacts by building on air quality forecasting and economical metrics. Our analysis includes data collected during the summertime ozone seasons between 2010 and 2012 from air quality models for the Washington, DC/Baltimore, MD region. The metrics that are relevant to our analysis include: (1) The number of times that a high ozone or particulate matter (PM) episode is correctly forecasted, (2) the number of times that high ozone or PM episode is forecasted when it does not occur and (3) the number of times when the air quality forecast predicts a cleaner air episode when the air was observed to have high ozone or PM. Our collection of data included available air quality model forecasts of ozone and particulate matter data from the U.S. Environmental Protection Agency (EPA)'s AIRNOW as well as observational data of ozone and particulate matter from Clean Air Partners. We evaluated the performance of the air quality forecasts with that of the observational data and found that the forecast models perform well for the Baltimore/Washington region and the time interval observed. We estimate the potential amount for the Baltimore/Washington region accrues to a savings of up to 5,905 lives and 5.9 billion dollars per year. This total assumes perfect compliance with
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AIR QUALITY AND GLOBAL CLIMATE CHANGE (PHASE 1)
Predicted changes in the global climate over the coming decades could alter weather patterns and, thus, impact land use, source emissions, and tropospheric air quality. The United States has a series of standards for criteria air pollutants and other air pollutants in place to s...
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DOE Office of Scientific and Technical Information (OSTI.GOV)
Allison, J.E.
1999-07-01
Following more than a decade of negotiations, the Canada-United States Agreement on Air Quality entered into force on March 13, 1991, with the signatures of then-Canadian Prime Minister Brian Mulroney and US President George Bush. Why was it so difficult for Canadian and US negotiators to reach agreement? The author argues that Canadian and US domestic politics were the primary impediments to resolving the US-Canada acid rain dispute. This article thus casts the dispute in terms of a pair of domestic environmental policy problems, whose timely and complementary solution, furthermore, required executive initiative as the handmaiden of ecological crisis. Heightenedmore » public concern about the threat of acidic air pollution in Canada prompted Mulroney's efforts to reduce acid rain. In the US, a likewise critical change in the public's perception of air quality as a national emergency created the mass support necessary for Bush's federal acid rain control initiative.« less
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MANAGING INDOOR AIR QUALITY IN THE USA
The paper gives an overview of managing indoor air quality (IAQ) in the U.S. In contrast to outdoor air, which is regulated through various federal and state statutes, there is no unified and comprehensive governmental regulation of IAQ. Therefore, IAQ is managed through variou...
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Emission Reduction Potential of the Congestion Mitigation and Air Quality Program
DOT National Transportation Integrated Search
1997-05-19
The Congestion Mitigation and Air Quality Improvement Program (CMAQ) provides : funds to states for projects designed to help attain and maintain the national : ambient air quality standards (NAAQS) set under the Clean Air Act (CAA). CMAQ : was creat...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-12-17
... Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Commonwealth of Virginia... Declaration and Withdrawal of EPA Plan Approval AGENCY: Environmental Protection Agency (EPA). ACTION... request for EPA withdrawal of its section 111(d)/129 plan (the plan) approval for HMIWI units. Submittal...
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A novel, fuzzy-based air quality index (FAQI) for air quality assessment
NASA Astrophysics Data System (ADS)
Sowlat, Mohammad Hossein; Gharibi, Hamed; Yunesian, Masud; Tayefeh Mahmoudi, Maryam; Lotfi, Saeedeh
2011-04-01
The ever increasing level of air pollution in most areas of the world has led to development of a variety of air quality indices for estimation of health effects of air pollution, though the indices have their own limitations such as high levels of subjectivity. Present study, therefore, aimed at developing a novel, fuzzy-based air quality index (FAQI ) to handle such limitations. The index developed by present study is based on fuzzy logic that is considered as one of the most common computational methods of artificial intelligence. In addition to criteria air pollutants (i.e. CO, SO 2, PM 10, O 3, NO 2), benzene, toluene, ethylbenzene, xylene, and 1,3-butadiene were also taken into account in the index proposed, because of their considerable health effects. Different weighting factors were then assigned to each pollutant according to its priority. Trapezoidal membership functions were employed for classifications and the final index consisted of 72 inference rules. To assess the performance of the index, a case study was carried out employing air quality data at five different sampling stations in Tehran, Iran, from January 2008 to December 2009, results of which were then compared to the results obtained from USEPA air quality index (AQI). According to the results from present study, fuzzy-based air quality index is a comprehensive tool for classification of air quality and tends to produce accurate results. Therefore, it can be considered useful, reliable, and suitable for consideration by local authorities in air quality assessment and management schemes. Fuzzy-based air quality index (FAQI).
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Air Quality Criteria for Lead (Final Report, 2006)
National Ambient Air Quality Standards (NAAQS) are promulgated by the United States Environmental Protection Agency (EPA) to meet requirements set forth in Sections 108 and 109 of the U.S. Clean Air Act. Those two Clean Air Act sections require the EPA Administrator (1) to list w...
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Study of the regional air quality south of Mexico City (Morelos state).
Salcedo, D; Castro, T; Ruiz-Suárez, L G; García-Reynoso, A; Torres-Jardón, R; Torres-Jaramillo, A; Mar-Morales, B E; Salcido, A; Celada, A T; Carreón-Sierra, S; Martínez, A P; Fentanes-Arriaga, O A; Deustúa, E; Ramos-Villegas, R; Retama-Hernández, A; Saavedra, M I; Suárez-Lastra, M
2012-01-01
Results from the first study of the regional air quality in Morelos state (located south of Mexico City) are presented. Criteria pollutants concentrations were measured at several sites within Morelos in February and March of 2007 and 2009; meteorological data was also collected along the state for the same time periods; additionally, a coupled meteorology-chemistry model (Mesoscale Climate Chemistry Model, MCCM) was used to gain understanding on the atmospheric processes occurring in the region. In general, concentrations of almost all the monitored pollutants (O(3), NO(x), CO, SO(2), PM) remained below the Mexican air quality standards during the campaign; however, relatively high concentrations of ozone (8-hour average concentrations above the 60 ppb level several times during the campaigns, i.e. exceeding the World Health Organization and the European Union maximum levels) were observed even at sites with very low reported local emissions. In fact, there is evidence that a large percentage of Morelos vegetation was probably exposed to unhealthy ozone levels (estimated AOT40 levels above the 3 ppm h critical limit). The MCCM qualitatively reproduced ozone daily variations in the sites with an urban component; though it consistently overestimated the ozone concentration in all the sites in Morelos. This is probably because the lack of an updated and detailed emission inventory for the state. The main wind patterns in the region corresponded to the mountain-valley system (downslope flows at night and during the first hours of the day, and upslope flows in the afternoon). At times, Morelos was affected by emissions from surrounding states (Distrito Federal or Puebla). The results are indicative of an efficient transport of ozone and its precursors at a regional level. They also suggest that the state is divided in two atmospheric basins by the Sierras de Tepoztlán, Texcal and Monte Negro. Copyright © 2011 Elsevier B.V. All rights reserved.
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Evaluation of the Community Multiscale Air Quality model version 5.1
The Community Multiscale Air Quality model is a state-of-the-science air quality model that simulates the emission, transport and fate of numerous air pollutants, including ozone and particulate matter. The Atmospheric Modeling and Analysis Division (AMAD) of the U.S. Environment...
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Applications of MODIS satellite data and products for monitoring air quality in the state of Texas
NASA Astrophysics Data System (ADS)
Hutchison, Keith D.
The Center for Space Research (CSR), in conjunction with the Monitoring Operations Division (MOD) of the Texas Commission on Environmental Quality (TCEQ), is evaluating the use of remotely sensed satellite data to assist in monitoring and predicting air quality in Texas. The challenges of meeting air quality standards established by the US Environmental Protection Agency (US EPA) are impacted by the transport of pollution into Texas that originates from outside our borders and are cumulative with those generated by local sources. In an attempt to quantify the concentrations of all pollution sources, MOD has installed ground-based monitoring stations in rural regions along the Texas geographic boundaries including the Gulf coast, as well as urban regions that are the predominant sources of domestic pollution. However, analysis of time-lapse GOES satellite imagery at MOD, clearly demonstrates the shortcomings of using only ground-based observations for monitoring air quality across Texas. These shortcomings include the vastness of State borders, that can only be monitored with a large number of ground-based sensors, and gradients in pollution concentration that depend upon the location of the point source, the meteorology governing its transport to Texas, and its diffusion across the region. With the launch of NASA's MODerate resolution Imaging Spectroradiometer (MODIS), the transport of aerosol-borne pollutants can now be monitored over land and ocean surfaces. Thus, CSR and MOD personnel have applied MODIS data to several classes of pollution that routinely impact Texas air quality. Results demonstrate MODIS data and products can detect and track the migration of pollutants. This paper presents one case study in which continental haze from the northeast moved into the region and subsequently required health advisories to be issued for 150 counties in Texas. It is concluded that MODIS provides the basis for developing advanced data products that will, when used in
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EVALUATING AND USING AIR QUALITY MODELS
Grid-based models are being used to assess the magnitude of the pollution problem and to design emission control strategies to achieve compliance with the relevant air quality standards in the United States.
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Air quality impacts of distributed energy resources implemented in the northeastern United States.
Carreras-Sospedra, Marc; Dabdub, Donald; Brouwer, Jacob; Knipping, Eladio; Kumar, Naresh; Darrow, Ken; Hampson, Anne; Hedman, Bruce
2008-07-01
Emissions from the potential installation of distributed energy resources (DER) in the place of current utility-scale power generators have been introduced into an emissions inventory of the northeastern United States. A methodology for predicting future market penetration of DER that considers economics and emission factors was used to estimate the most likely implementation of DER. The methodology results in spatially and temporally resolved emission profiles of criteria pollutants that are subsequently introduced into a detailed atmospheric chemistry and transport model of the region. The DER technology determined by the methodology includes 62% reciprocating engines, 34% gas turbines, and 4% fuel cells and other emerging technologies. The introduction of DER leads to retirement of 2625 MW of existing power plants for which emissions are removed from the inventory. The air quality model predicts maximum differences in air pollutant concentrations that are located downwind from the central power plants that were removed from the domain. Maximum decreases in hourly peak ozone concentrations due to DER use are 10 ppb and are located over the state of New Jersey. Maximum decreases in 24-hr average fine particulate matter (PM2.5) concentrations reach 3 microg/m3 and are located off the coast of New Jersey and New York. The main contribution to decreased PM2.5 is the reduction of sulfate levels due to significant reductions in direct emissions of sulfur oxides (SO(x)) from the DER compared with the central power plants removed. The scenario presented here represents an accelerated DER penetration case with aggressive emission reductions due to removal of highly emitting power plants. Such scenario provides an upper bound for air quality benefits of DER implementation scenarios.
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Air Quality Management Alternatives: United States Air Force Firefighter Training Facilities
1988-01-01
Pollution at LAX, JFK , and ORD," Impact of Aircraft Emissions on Air Quality in the Vicinity of Airports , Volume II, FAA-EE-80-09B, Federal...developed and applied . This method enabled fire prevention, and environmental management experts and professionals to provide data, opinions, and to...methodology utilizing questionnaires, interviews, and site visits is developed and applied . This method enabled fire prevention, and environmental
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Canada-wide standards and innovative transboundary air quality initiatives.
Barton, Jane
2008-01-01
Canada's approach to air quality management is one that has brought with it opportunities for the development of unique approaches to risk management. Even with Canada's relatively low levels of pollution, science has demonstrated clearly that air quality and ecosystem improvements are worthwhile. To achieve change and address air quality in Canada, Canadian governments work together since, under the constitution, they share responsibility for the environment. At the same time, because air pollution knows no boundaries, working with the governments of other nations is essential to get results. International cooperation at all levels provides opportunities with potential for real change. Cooperation within transboundary airsheds is proving a fruitful source of innovative opportunities to reduce cross-border barriers to air quality improvements. In relation to the NERAM Colloquium objective to establish principles for air quality management based on the identification of international best practice in air quality policy development and implementation, Canada has developed, both at home and with the United States, interesting air management strategies and initiatives from which certain lessons may be taken that could be useful in other countries with similar situations. In particular, the Canada-wide strategies for smog and acid rain were developed by Canadian governments, strategies that improve and protect air quality at home, while Canada-U.S. transboundary airshed projects provide examples of international initiatives to improve air quality.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-03-28
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R09-OAR-2012-0920; FRL-9779-1] Revision to the California State Implementation Plan, South Coast Air Quality Management Plan AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to approve a revision to the South...
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IMPLEMENTING ACCOUNTABILITY WITHIN A MULTI-POLLUTANT AIR QUALITY MANAGEMENT FRAMEWORK
In 2004, the National Research Council (NRC) published a major assessment of air quality management practices: Air Quality Management in the United States. The assessment resulted from a Congressional directive that the U.S. Environmental Protection Agency commission the Nationa...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-02-28
...EPA is proposing a limited approval of a revision to the North Carolina state implementation plan (SIP) submitted by the State of North Carolina through the North Carolina Department of Environment and Natural Resources, Division of Air Quality (NCDAQ), on December 17, 2007, that addresses regional haze for the first implementation period. This revision addresses the requirements of the Clean Air Act (CAA) and EPA's rules that require states to prevent any future and remedy any existing anthropogenic impairment of visibility in mandatory Class I areas (national parks and wilderness areas) caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the ``regional haze program''). States are required to assure reasonable progress toward the national goal of achieving natural visibility conditions in Class I areas. EPA is proposing a limited approval of this SIP revision to implement the regional haze requirements for North Carolina on the basis that the revision, as a whole, strengthens the North Carolina SIP. In a separate action, EPA has proposed a limited disapproval of the North Carolina regional haze SIP because of deficiencies in the State's regional haze SIP submittal arising from the remand by the U.S. Court of Appeals for the District of Columbia Circuit (DC Circuit) to EPA of the Clean Air Interstate Rule (CAIR). Consequently, EPA is not proposing to take action in this rulemaking to address the State's reliance on CAIR to meet certain regional haze requirements.
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75 FR 76332 - Approval and Promulgation of Air Quality Implementation Plans; Illinois
Federal Register 2010, 2011, 2012, 2013, 2014
2010-12-08
... Promulgation of Air Quality Implementation Plans; Illinois AGENCY: Environmental Protection Agency (EPA... attaining the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS). The State's NO X RACT waiver... classification of an area. The air quality planning and control requirements for the reduction of NO X emissions...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-27
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 50, 51, 70 and 71 [EPA-HQ-OAR-2010-0885, FRL-9810-3] RIN 2060-AR34 Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements Correction In proposed rule document 2013-13233 appearing on pages 34178 through...
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Chapter 4 of Assessing the Multiple Benefits of Clean Energy helps state states understand the methods, models, opportunities, and issues associated with assessing the GHG, air pollution, air quality, and human health benefits of clean energy options.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-14
...] Approval and Promulgation of Air Quality Implementation Plans; Delaware; Infrastructure Requirements for the 2010 Nitrogen Dioxide National Ambient Air Quality Standards AGENCY: Environmental Protection... national ambient air quality standards (NAAQS) are promulgated, the CAA requires states to submit a plan...
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CONCENTRATIONS OF TOXIC AIR POLLUTANTS IN THE U.S. SIMULATED BY AN AIR QUALITY MODEL
As part of the US National Air Toxics Assessment, we have applied the Community Multiscale Air Quality Model, CMAQ, to study the concentrations of twenty gas-phase, toxic, hazardous air pollutants (HAPs) in the atmosphere over the continental United States. We modified the Carbo...
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CHARACTERIZING AIR QUALITY FOR ENVIRONMENTAL PUBLIC HEALTH TRACKING
This presentation provides a brief summary of EPA's perspective on Environmental Public Health Tracking, the Public Health Air Surveillance Evaluation (PHASE), and EPA's efforts to provide air quality data to three states (Maine, New York, and Wisconsin) that are partners with CD...
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Study of Regional Downscaled Climate and Air Quality in the United States
NASA Astrophysics Data System (ADS)
Gao, Y.; Fu, J. S.; Drake, J.; Lamarque, J.; Lam, Y.; Huang, K.
2011-12-01
Due to the increasing anthropogenic greenhouse gas emissions, the global and regional climate patterns have significantly changed. Climate change has exerted strong impact on ecosystem, air quality and human life. The global model Community Earth System Model (CESM v1.0) was used to predict future climate and chemistry under projected emission scenarios. Two new emission scenarios, Representative Community Pathways (RCP) 4.5 and RCP 8.5, were used in this study for climate and chemistry simulations. The projected global mean temperature will increase 1.2 and 1.7 degree Celcius for the RCP 4.5 and RCP 8.5 scenarios in 2050s, respectively. In order to take advantage of local detailed topography, land use data and conduct local climate impact on air quality, we downscaled CESM outputs to 4 km by 4 km Eastern US domain using Weather Research and Forecasting (WRF) Model and Community Multi-scale Air Quality modeling system (CMAQ). The evaluations between regional model outputs and global model outputs, regional model outputs and observational data were conducted to verify the downscaled methodology. Future climate change and air quality impact were also examined on a 4 km by 4 km high resolution scale.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-29
... Quality Implementation Plan; California; Sacramento Metropolitan Air Quality Management District... to the Sacramento Metropolitan Air Quality Management District (SMAQMD or District) portion of the..., Sacramento Metropolitan Air Quality Management District, Rule 214 (Federal New Source Review), Rule 203...
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Co-benefits of air quality and climate change policies on air quality of the Mediterranean
NASA Astrophysics Data System (ADS)
Pozzoli, Luca; Mert Gokturk, Ozan; Unal, Alper; Kindap, Tayfun; Janssens-Maenhout, Greet
2015-04-01
The Mediterranean basin is one of the regions of the world where significant impacts due to climate changes are predicted to occur in the future. Observations and model simulations are used to provide to the policy makers scientifically based estimates of the necessity to adjust national emission reductions needed to achieve air quality objectives in the context of a changing climate, which is not only driven by GHGs, but also by short lived climate pollutants, such as tropospheric ozone and aerosols. There is an increasing interest and need to design cost-benefit emission reduction strategies, which could improve both regional air quality and global climate change. In this study we used the WRF-CMAQ air quality modelling system to quantify the contribution of anthropogenic emissions to ozone and particulate matter concentrations in Europe and the Eastern Mediterranean and to understand how this contribution could change in different future scenarios. We have investigated four different future scenarios for year 2050 defined during the European Project CIRCE: a "business as usual" scenario (BAU) where no or just actual measures are taken into account; an "air quality" scenario (BAP) which implements the National Emission Ceiling directive 2001/81/EC member states of the European Union (EU-27); a "climate change" scenario (CC) which implements global climate policies decoupled from air pollution policies; and an "integrated air quality and climate policy" scenario (CAP) which explores the co-benefit of global climate and EU-27 air pollution policies. The BAP scenario largely decreases summer ozone concentrations over almost the entire continent, while the CC and CAP scenarios similarly determine lower decreases in summer ozone but extending all over the Mediterranean, the Middle East countries and Russia. Similar patterns are found for winter PM concentrations; BAP scenario improves pollution levels only in the Western EU countries, and the CAP scenario determines
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NASA Technical Reports Server (NTRS)
Falke, Stefan; Husar, Rudolf
2011-01-01
The goal of this REASoN applications and technology project is to deliver and use Earth Science Enterprise (ESE) data and tools in support of air quality management. Its scope falls within the domain of air quality management and aims to develop a federated air quality information sharing network that includes data from NASA, EPA, US States and others. Project goals were achieved through a access of satellite and ground observation data, web services information technology, interoperability standards, and air quality community collaboration. In contributing to a network of NASA ESE data in support of particulate air quality management, the project will develop access to distributed data, build Web infrastructure, and create tools for data processing and analysis. The key technologies used in the project include emerging web services for developing self describing and modular data access and processing tools, and service oriented architecture for chaining web services together to assemble customized air quality management applications. The technology and tools required for this project were developed within DataFed.net, a shared infrastructure that supports collaborative atmospheric data sharing and processing web services. Much of the collaboration was facilitated through community interactions through the Federation of Earth Science Information Partners (ESIP) Air Quality Workgroup. The main activities during the project that successfully advanced DataFed, enabled air quality applications and established community-oriented infrastructures were: develop access to distributed data (surface and satellite), build Web infrastructure to support data access, processing and analysis create tools for data processing and analysis foster air quality community collaboration and interoperability.
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75 FR 48929 - Notice of Meeting of the Agricultural Air Quality Task Force
Federal Register 2010, 2011, 2012, 2013, 2014
2010-08-12
... Agricultural Air Quality Task Force AGENCY: Natural Resources Conservation Service (NRCS), United States... Triangle Park, North Carolina 27711; (919) 541-5400. The Agricultural Air Quality Task Force (AAQTF) will meet to continue discussions on air quality issues relating to agriculture. Additionally, the Livestock...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-30
...] Approval and Promulgation of Air Quality Implementation Plans; Delaware; Infrastructure Requirements for the 2008 Ozone National Ambient Air Quality Standards AGENCY: Environmental Protection Agency (EPA... ambient air quality standards (NAAQS) are promulgated, the CAA requires states to submit a plan for the...
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Local Air Quality Conditions and Forecasts
... Monitor Location Archived Maps by Region Canada Air Quality Air Quality on Google Earth Links A-Z About AirNow AirNow International Air Quality Action Days / Alerts AirCompare Air Quality Index (AQI) ...
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Measuring Indoor Air Quality of Hookah Lounges
Fiala, Steven C.; Pawlak, Rebecca L.
2012-01-01
Many states have implemented smoke-free workplace laws to protect employees and customers from exposure to secondhand smoke. However, exemptions in these laws have allowed indoor tobacco smoking in hookah lounges to proliferate in recent years. To describe the amount of secondhand smoke in hookah lounges, we measured the indoor air quality of 10 hookah lounges in Oregon. Air quality measurements ranged from “unhealthy” to “hazardous” according to Environmental Protection Agency standards, indicating a potential health risk for patrons and employees. PMID:22994168
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Yang, Zhongshan; Wang, Jian
2017-10-01
Air pollution in many countries is worsening with industrialization and urbanization, resulting in climate change and affecting people's health, thus, making the work of policymakers more difficult. It is therefore both urgent and necessary to establish amore scientific air quality monitoring and early warning system to evaluate the degree of air pollution objectively, and predict pollutant concentrations accurately. However, the integration of air quality assessment and air pollutant concentration prediction to establish an air quality system is not common. In this paper, we propose a new air quality monitoring and early warning system, including an assessment module and forecasting module. In the air quality assessment module, fuzzy comprehensive evaluation is used to determine the main pollutants and evaluate the degree of air pollution more scientifically. In the air pollutant concentration prediction module, a novel hybridization model combining complementary ensemble empirical mode decomposition, a modified cuckoo search and differential evolution algorithm, and an Elman neural network, is proposed to improve the forecasting accuracy of six main air pollutant concentrations. To verify the effectiveness of this system, pollutant data for two cities in China are used. The result of the fuzzy comprehensive evaluation shows that the major air pollutants in Xi'an and Jinan are PM 10 and PM 2.5 respectively, and that the air quality of Xi'an is better than that of Jinan. The forecasting results indicate that the proposed hybrid model is remarkably superior to all benchmark models on account of its higher prediction accuracy and stability. Copyright © 2017 Elsevier Inc. All rights reserved.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-16
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 81 [EPA-R09-OAR-2013-0104; FRL-9802-5] Designation of Areas for Air Quality Planning Purposes; State of Nevada; Total Suspended Particulate AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule. SUMMARY: EPA is proposing to delete certain area...
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Evaluation of the Community Multiscale Air Quality (CMAQ) Model Version 5.2
The Community Multiscale Air Quality (CMAQ) model is a state-of-the-science air quality model that simulates the emission, transport and fate of numerous air pollutants, including ozone and particulate matter. The Computational Exposure Division (CED) of the U.S. Environmental Pr...
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Evaluation of the Community Multi-scale Air Quality Model Version 5.2
The Community Multiscale Air Quality (CMAQ) model is a state-of-the-science air quality model that simulates the emission, transport and fate of numerous air pollutants, including ozone and particulate matter. The Computational Exposure Division (CED) of the U.S. Environmental Pr...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-04-19
... Promulgation of Air Quality Implementation Plans; Indiana; Particulate Matter Ambient Air Quality Standards... revise the Indiana State Implementation Plan (SIP) for particulate matter under the Clean Air Act. This submission contains the 24-hour fine particle National Ambient Air Quality Standards (NAAQS) promulgated by...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-09-29
... Municipal Air Quality Management District and South Coast Air Quality Management District AGENCY... the Santa Barbara Air Pollution Control District (SBAPCD), Sacramento Municipal Air Quality Management District (SMAQMD) and South Coast Air Quality Management District (SCAQMD) portions of the California State...
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Air Pollution Monitoring | Air Quality Planning & Standards ...
2016-06-08
The basic mission of the Office of Air Quality Planning and Standards is to preserve and improve the quality of our nation's air. To accomplish this, OAQPS must be able to evaluate the status of the atmosphere as compared to clean air standards and historical information.
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40 CFR 81.220 - Eastern Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 18 2014-07-01 2014-07-01 false Eastern Oregon Intrastate Air Quality... Quality Control Regions § 81.220 Eastern Oregon Intrastate Air Quality Control Region. The Eastern Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Baker County, Gilliam County, Grant...
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40 CFR 81.219 - Central Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Central Oregon Intrastate Air Quality... Quality Control Regions § 81.219 Central Oregon Intrastate Air Quality Control Region. The Central Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Crook County, Deschutes County, Hood...
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40 CFR 81.220 - Eastern Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Eastern Oregon Intrastate Air Quality... Quality Control Regions § 81.220 Eastern Oregon Intrastate Air Quality Control Region. The Eastern Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Baker County, Gilliam County, Grant...
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40 CFR 81.219 - Central Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 18 2013-07-01 2013-07-01 false Central Oregon Intrastate Air Quality... Quality Control Regions § 81.219 Central Oregon Intrastate Air Quality Control Region. The Central Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Crook County, Deschutes County, Hood...
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40 CFR 81.220 - Eastern Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 18 2012-07-01 2012-07-01 false Eastern Oregon Intrastate Air Quality... Quality Control Regions § 81.220 Eastern Oregon Intrastate Air Quality Control Region. The Eastern Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Baker County, Gilliam County, Grant...
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40 CFR 81.220 - Eastern Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 17 2011-07-01 2011-07-01 false Eastern Oregon Intrastate Air Quality... Quality Control Regions § 81.220 Eastern Oregon Intrastate Air Quality Control Region. The Eastern Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Baker County, Gilliam County, Grant...
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40 CFR 81.219 - Central Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 18 2012-07-01 2012-07-01 false Central Oregon Intrastate Air Quality... Quality Control Regions § 81.219 Central Oregon Intrastate Air Quality Control Region. The Central Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Crook County, Deschutes County, Hood...
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40 CFR 81.220 - Eastern Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 18 2013-07-01 2013-07-01 false Eastern Oregon Intrastate Air Quality... Quality Control Regions § 81.220 Eastern Oregon Intrastate Air Quality Control Region. The Eastern Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Baker County, Gilliam County, Grant...
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40 CFR 81.219 - Central Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 18 2014-07-01 2014-07-01 false Central Oregon Intrastate Air Quality... Quality Control Regions § 81.219 Central Oregon Intrastate Air Quality Control Region. The Central Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Crook County, Deschutes County, Hood...
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40 CFR 81.219 - Central Oregon Intrastate Air Quality Control Region.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 17 2011-07-01 2011-07-01 false Central Oregon Intrastate Air Quality... Quality Control Regions § 81.219 Central Oregon Intrastate Air Quality Control Region. The Central Oregon... outermost boundaries of the area so delimited): In the State of Oregon: Crook County, Deschutes County, Hood...
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40 CFR 81.190 - Eastern Idaho Intrastate Air Quality Control Region.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Eastern Idaho Intrastate Air Quality... Quality Control Regions § 81.190 Eastern Idaho Intrastate Air Quality Control Region. The Eastern Idaho... outermost boundaries of the area so delimited): In the State of Idaho: Bannock County, Bear Lake County...
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40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 18 2012-07-01 2012-07-01 false San Diego Intrastate Air Quality... Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego Intrastate... within the outermost boundaries of the area so delimited): In the State of California: San Diego County...
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40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 18 2014-07-01 2014-07-01 false San Diego Intrastate Air Quality... Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego Intrastate... within the outermost boundaries of the area so delimited): In the State of California: San Diego County...
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40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 18 2013-07-01 2013-07-01 false San Diego Intrastate Air Quality... Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego Intrastate... within the outermost boundaries of the area so delimited): In the State of California: San Diego County...
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40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 17 2010-07-01 2010-07-01 false San Diego Intrastate Air Quality... Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego Intrastate... within the outermost boundaries of the area so delimited): In the State of California: San Diego County...
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40 CFR 81.164 - San Diego Intrastate Air Quality Control Region.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 17 2011-07-01 2011-07-01 false San Diego Intrastate Air Quality... Quality Control Regions § 81.164 San Diego Intrastate Air Quality Control Region. The San Diego Intrastate... within the outermost boundaries of the area so delimited): In the State of California: San Diego County...
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Assessing indoor air quality in New York City nail salons.
Pavilonis, Brian; Roelofs, Cora; Blair, Carly
2018-05-01
Nail salons are an important business and employment sector for recent immigrants offering popular services to a diverse range of customers across the United States. However, due to the nature of nail products and services, salon air can be burdened with a mix of low levels of hazardous airborne contaminants. Surveys of nail technicians have commonly found increased work-related symptoms, such as headaches and respiratory irritation, that are consistent with indoor air quality problems. In an effort to improve indoor air quality in nail salons, the state of New York recently promulgated regulations to require increased outdoor air and "source capture" of contaminants. Existing indoor air quality in New York State salons is unknown. In advance of the full implementation of the rules by 2021, we sought to establish reliable and usable baseline indoor air quality metrics to determine the feasibility and effectiveness of the requirement. In this pilot study, we measured total volatile organic compounds (TVOC) and carbon dioxide (CO 2 ) concentrations in 10 nail salons located in New York City to assess temporal and spatial trends. Within salon contaminant variation was generally minimal, indicating a well-mixed room and similar general exposure despite the task being performed. TVOC and CO 2 concentrations were strongly positively correlated (ρ = 0.81; p < 0.01) suggesting that CO 2 measurements could potentially be used to provide an initial determination of acceptable indoor air quality for the purposes of compliance with the standard. An almost tenfold increase in TVOC concentration was observed when the American National Standards Institute/American Society of Heating, Refrigerating and Air-Conditioning Engineers (ANSI/ASHRAE) target CO 2 concentration of 850 ppm was exceeded compared to when this target was met.
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Air Quality Response Modeling for Decision Support | Science ...
Air quality management relies on photochemical models to predict the responses of pollutant concentrations to changes in emissions. Such modeling is especially important for secondary pollutants such as ozone and fine particulate matter which vary nonlinearly with changes in emissions. Numerous techniques for probing pollutant-emission relationships within photochemical models have been developed and deployed for a variety of decision support applications. However, atmospheric response modeling remains complicated by the challenge of validating sensitivity results against observable data. This manuscript reviews the state of the science of atmospheric response modeling as well as efforts to characterize the accuracy and uncertainty of sensitivity results. The National Exposure Research Laboratory′s (NERL′s) Atmospheric Modeling and Analysis Division (AMAD) conducts research in support of EPA′s mission to protect human health and the environment. AMAD′s research program is engaged in developing and evaluating predictive atmospheric models on all spatial and temporal scales for forecasting the Nation′s air quality and for assessing changes in air quality and air pollutant exposures, as affected by changes in ecosystem management and regulatory decisions. AMAD is responsible for providing a sound scientific and technical basis for regulatory policies based on air quality models to improve ambient air quality. The models developed by AMAD are being use
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NASA Astrophysics Data System (ADS)
Kim, M. J.; Teng, A.; Crounse, J.; Wennberg, P. O.
2016-12-01
Hydroxynitrates, a multifunctional product of alkene oxidation, can make significant impacts on regional ozone, SOA, and NOX budgets. A product of VOC oxidation and NOx, hydroxynitrates can be key markers of interactions between biogenic and anthropogenic sources, as well as aging of petrochemical emissions. This work compares observations from recent field campaigns across the globe including the Southeast United States (SEAC4RS, SOAS) as well as the recently concluded Korean US Air Quality mission (KORUS-AQ). The KORUS-AQ airborne campaign examined air quality around the Seoul Metropolitan Area (population 25 million) and immediate forested regions, as well as petrochemical processing facilities and shipping activities throughout the Korean peninsula.
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LiDAR for Air Quality Measurements
DOT National Transportation Integrated Search
2017-02-02
The overall goal of this research is to investigate a unique light detection and ranging (LiDAR) technology for ambient air quality measurement of particulate matter. The ODU team has recently received a state-of-the-art elastic LiDAR from NASA Langl...
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-10-25
...] Approval of Air Quality Implementation Plans; California; El Dorado County Air Quality Management District... California for the El Dorado County Air Quality Management District (EDAQMD) portion of the California SIP... 24, 1987 Federal Register, May 25, 1988, U.S. EPA, Air Quality Management Division, Office of Air...
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Special Report. States Doubt Clean Air Achievement
ERIC Educational Resources Information Center
Environmental Science and Technology, 1974
1974-01-01
This special report reviews air quality control plans formulated by each state. Comparisons of these plans and discussions on the degree of implementation achieved by state governments are presented. Problems surrounding the establishment and implementation of EPA approved plans are discussed. (JP)
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Air quality management in Mexico.
Fernández-Bremauntz, Adrián
2008-01-01
Several significant program and policy measures have been implemented in Mexico over the past 15 yr to improve air quality. This article provides an overview of air quality management strategies in Mexico, including (1) policy initiatives such as vehicle use restrictions, air quality standards, vehicle emissions, and fuel quality standards, and (2) supporting programs including establishment of a national emission inventory, an air pollution episodes program, and the implementation of exposure and health effects studies. Trends in air pollution episodes and ambient air pollutant concentrations are described.
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Urban Air Quality Modelling with AURORA: Prague and Bratislava
NASA Astrophysics Data System (ADS)
Veldeman, N.; Viaene, P.; De Ridder, K.; Peelaerts, W.; Lauwaet, D.; Muhammad, N.; Blyth, L.
2012-04-01
The European Commission, in its strategy to protect the health of the European citizens, states that in order to assess the impact of air pollution on public health, information on long-term exposure to air pollution should be available. Currently, indicators of air quality are often being generated using measured pollutant concentrations. While air quality monitoring stations data provide accurate time series information at specific locations, air quality models have the advantage of being able to assess the spatial variability of air quality (for different resolutions) and predict air quality in the future based on different scenarios. When running such air quality models at a high spatial and temporal resolution, one can simulate the actual situation as closely as possible, allowing for a detailed assessment of the risk of exposure to citizens from different pollutants. AURORA (Air quality modelling in Urban Regions using an Optimal Resolution Approach), a prognostic 3-dimensional Eulerian chemistry-transport model, is designed to simulate urban- to regional-scale atmospheric pollutant concentration and exposure fields. The AURORA model also allows to calculate the impact of changes in land use (e.g. planting of trees) or of emission reduction scenario's on air quality. AURORA is currently being applied within the ESA atmospheric GMES service, PASODOBLE (http://www.myair-eu.org), that delivers information on air quality, greenhouse gases, stratospheric ozone, … At present there are two operational AURORA services within PASODOBLE. Within the "Air quality forecast service" VITO delivers daily air quality forecasts for Belgium at a resolution of 5 km and for the major Belgian cities: Brussels, Ghent, Antwerp, Liege and Charleroi. Furthermore forecast services are provided for Prague, Czech Republic and Bratislava, Slovakia, both at a resolution of 1 km. The "Urban/regional air quality assessment service" provides urban- and regional-scale maps (hourly resolution
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-11-01
...] Approval and Promulgation of Air Quality Implementation Plans; West Virginia; Infrastructure Requirements for the 2010 Nitrogen Dioxide National Ambient Air Quality Standards AGENCY: Environmental Protection... revised national ambient air quality standards (NAAQS) are promulgated, the CAA requires states to submit...
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Improving AirNow Air Quality Products with NASA Near-Real-Time Remote Sensing Data (Invited)
NASA Astrophysics Data System (ADS)
Dye, T.; Pasch, A. N.; DeWinter, J. L.; Haderman, M.; Szykman, J.; White, J. E.; van Donkelaar, A.; Martin, R.
2013-12-01
The U.S. Environmental Protection Agency's (EPA) AirNow program provides the public with real-time and forecasted air quality conditions. Millions of people each day use it to protect their health. The AirNow program (http://www.airnow.gov), reports ground-level ozone (O3) and fine particulate matter (PM2.5) in a standardized index called the Air Quality Index (AQI). AirNow aggregates information from over 130 state, local, and federal air quality agencies and provides tools for over 2,000 agency staff responsible for monitoring, forecasting, and communicating local air quality. Each hour, AirNow systems generate thousands of maps and products. This presentation will describe how AirNow is benefiting from NASA's remote sensing data. We will describe two applications of NASA near-real-time remote sensing data within AirNow through case studies, focusing specifically on days when large spatial gradients in AQI and wildfire smoke impacts were observed. The first case study will show how AirNow is merging satellite-estimated PM2.5 concentrations into the AQI maps via the AirNow Satellite Data Processor (ASDP). AirNow derives these satellite estimates using NASA/NOAA satellite aerosol optical depth (AOD) retrievals and GEOS-Chem modeled ratios of surface PM2.5 concentrations to AOD. The second case study will show how NASA's Global Image Browse Services (GIBS) provides a near-real-time satellite product in AirNow-Tech for agency users to quickly identify smoke plumes and access air quality conditions in data-sparse areas during wildland fires.
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Developing air quality forecasts
NASA Astrophysics Data System (ADS)
Lee, Pius; Saylor, Rick; Meagher, James
2012-05-01
Third International Workshop on Air Quality Forecasting Research; Potomac, Maryland, 29 November to 1 December 2011 Elevated concentrations of both near-surface ozone (O3) and fine particulate matter smaller than 2.5 micrometers in diameter have been implicated in increased mortality and other human health impacts. In light of these known influences on human health, many governments around the world have instituted air quality forecasting systems to provide their citizens with advance warning of impending poor air quality so that they can take actions to limit exposure. In an effort to improve the performance of air quality forecasting systems and provide a forum for the exchange of the latest research in air quality modeling, the International Workshop on Air Quality Forecasting Research (IWAQFR) was established in 2009 and is cosponsored by the U.S. National Oceanic and Atmospheric Administration (NOAA), Environment Canada (EC), and the World Meteorological Organization (WMO). The steering committee for IWAQFR's establishment was composed of Véronique Bouchet, Mike Howe, and Craig Stoud (EC); Greg Carmichael (University of Iowa); Paula Davidson and Jim Meagher (NOAA); and Liisa Jalkanen (WMO). The most recent workshop took place in Maryland.
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Indoor Air Quality Management Program.
ERIC Educational Resources Information Center
Anne Arundel County Public Schools, Annapolis, MD.
In an effort to provide Indoor Air Quality (IAQ) management guidance, Anne Arundel County Public Schools was selected by the Maryland State Department of Education to develop a program that could be used by other school systems. A major goal was to produce a handbook that was "user friendly." Hence, its contents are a mix of history,…
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NASA Technical Reports Server (NTRS)
Tao, Zhining; Yu, Hongbin; Chin, Mian
2015-01-01
Observations have well established that aerosols from various sources in Asia, Europe, and Africa can travel across the Pacific and reach the contiguous United States (U.S.) at least on episodic bases throughout a year, with a maximum import in spring. The imported aerosol not only can serve as an additional source to regional air pollution (e.g., direct input), but also can influence regional air quality through the aerosol-cloud-radiation (ACR) interactions that change local and regional meteorology. This study assessed impacts of the transpacific aerosol on air quality, focusing on surface ozone and PM2.5, over the U.S. using the NASA Unified Weather Research Forecast model. Based on the results of 3- month (April to June of 2010) simulations, the impact of direct input (as an additional source) of transpacific aerosol caused an increase of surface PM2.5 concentration by approximately 1.5 micro-g/cu m over the west coast and about 0.5 micro-g/cu m over the east coast of the U.S. By influencing key meteorological processes through the ACR interactions, the transpacific aerosol exerted a significant effect on both surface PM2.5 (+/-6 micro-g/cu m3) and ozone (+/-12 ppbv) over the central and eastern U.S. This suggests that the transpacific transport of aerosol could either improve or deteriorate local air quality and complicate local effort toward the compliance with the U.S. National Ambient Air Quality Standards.
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78 FR 50369 - Approval and Promulgation of Air Quality Implementation Plans; Michigan
Federal Register 2010, 2011, 2012, 2013, 2014
2013-08-19
...] Approval and Promulgation of Air Quality Implementation Plans; Michigan AGENCY: Environmental Protection... the State of Michigan's Clean Air Act State Implementation Plan (SIP) that Michigan had submitted on March 24, 2009. Michigan's submittal included revisions to Part 1, Definitions; Part 2, Air Use Approval...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-10-26
... Promulgation of Air Quality Implementation Plans; Ohio; Ohio Ambient Air Quality Standards AGENCY... Ohio Administrative Code (OAC) relating to the consolidation of Ohio's Ambient Air Quality Standards... apply to Ohio's SIP. Incorporating the air quality standards into Ohio's SIP helps assure that...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-12-10
... Quality Implementation Plans; California; South Coast Air Quality Management District; Prevention of... Implementation Plan (SIP) revision for the South Coast Air Quality Management District (SCAQMD or District... in a August 15, 2012 letter from the South Coast Air Quality Management District regarding specific...
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The Use of Regulatory Air Quality Models to Develop Successful Ozone Attainment Strategies
NASA Astrophysics Data System (ADS)
Canty, T. P.; Salawitch, R. J.; Dickerson, R. R.; Ring, A.; Goldberg, D. L.; He, H.; Anderson, D. C.; Vinciguerra, T.
2015-12-01
The Environmental Protection Agency (EPA) recently proposed lowering the 8-hr ozone standard to between 65-70 ppb. Not all regions of the U.S. are in attainment of the current 75 ppb standard and it is expected that many regions currently in attainment will not meet the future, lower surface ozone standard. Ozone production is a nonlinear function of emissions, biological processes, and weather. Federal and state agencies rely on regulatory air quality models such as the Community Multi-Scale Air Quality (CMAQ) model and Comprehensive Air Quality Model with Extensions (CAMx) to test ozone precursor emission reduction strategies that will bring states into compliance with the National Ambient Air Quality Standards (NAAQS). We will describe various model scenarios that simulate how future limits on emission of ozone precursors (i.e. NOx and VOCs) from sources such as power plants and vehicles will affect air quality. These scenarios are currently being developed by states required to submit a State Implementation Plan to the EPA. Projections from these future case scenarios suggest that strategies intended to control local ozone may also bring upwind states into attainment of the new NAAQS. Ground based, aircraft, and satellite observations are used to ensure that air quality models accurately represent photochemical processes within the troposphere. We will highlight some of the improvements made to the CMAQ and CAMx model framework based on our analysis of NASA observations obtained by the OMI instrument on the Aura satellite and by the DISCOVER-AQ field campaign.
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Air quality impacts of projections of natural gas-fired distributed generation
NASA Astrophysics Data System (ADS)
Horne, Jeremy R.; Carreras-Sospedra, Marc; Dabdub, Donald; Lemar, Paul; Nopmongcol, Uarporn; Shah, Tejas; Yarwood, Greg; Young, David; Shaw, Stephanie L.; Knipping, Eladio M.
2017-11-01
This study assesses the potential impacts on emissions and air quality from the increased adoption of natural gas-fired distributed generation of electricity (DG), including displacement of power from central power generation, in the contiguous United States. The study includes four major tasks: (1) modeling of distributed generation market penetration; (2) modeling of central power generation systems; (3) modeling of spatially and temporally resolved emissions; and (4) photochemical grid modeling to evaluate the potential air quality impacts of increased DG penetration, which includes both power-only DG and combined heat and power (CHP) units, for 2030. Low and high DG penetration scenarios estimate the largest penetration of future DG units in three regions - New England, New York, and California. Projections of DG penetration in the contiguous United States estimate 6.3 GW and 24 GW of market adoption in 2030 for the low DG penetration and high DG penetration scenarios, respectively. High DG penetration (all of which is natural gas-fired) serves to offset 8 GW of new natural gas combined cycle (NGCC) units, and 19 GW of solar photovoltaic (PV) installations by 2030. In all scenarios, air quality in the central United States and the northwest remains unaffected as there is little to no DG penetration in those states. California and several states in the northeast are the most impacted by emissions from DG units. Peak increases in maximum daily 8-h average ozone concentrations exceed 5 ppb, which may impede attainment of ambient air quality standards. Overall, air quality impacts from DG vary greatly based on meteorological conditions, proximity to emissions sources, the number and type of DG installations, and the emissions factors used for DG units.
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-04-09
... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R06-OAR-2006-0988; FRL-9135-5] Approval and Promulgation of Air Quality Implementation Plans; Texas; Control of Air Pollution From Motor Vehicles AGENCY... (TAC), Chapter 114, Control of Air Pollution from Motor Vehicles. The State submitted these revisions...
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Alternative Fuels Data Center: Electric Ice Resurfacers Improve Air Quality
in MinnesotaA> Electric Ice Resurfacers Improve Air Quality in Minnesota to someone by E-mail alternative fuel vehicles to improve air quality. For information about this project, contact Twin Cities Related Videos Photo of a car Electric Vehicles Charge up at State Parks in West Virginia Dec. 9, 2017
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-03-01
... Promulgation of Air Quality Implementation Plans; Indiana; Lead Ambient Air Quality Standards AGENCY... incorporates the National Ambient Air Quality Standards (NAAQS) for Pb promulgated by EPA in 2008. DATES: This... FR 66964) and codified at 40 CFR 50.16, ``National primary and secondary ambient air quality...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-04-16
... Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to the Wyoming Air Quality Standards and.... Wyoming has revised its Air Quality Standards and Regulations, specifically Chapter 1, Section 5... Wyoming's State Implementation Plan (SIP). These revisions amend Wyoming's Air Quality Standards and...
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IMPROVING NATIONAL AIR QUALITY FORECASTS WITH SATELLITE AEROSOL OBSERVATIONS
Air quality forecasts for major US metropolitan areas have been provided to the public through a partnership between the US Environmental Protection Agency and state and local air agencies since 1997. Recent years have witnessed improvement in forecast skill and expansion of fore...
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Approved Air Quality Implementation Plans in Region 10
Landing page for information about EPA-approved air quality State Implementation Plans (SIPs), Tribal Implementation Plans (TIPs), and Federal Implementation Plans (FIPs) in Alaska, Idaho, Oregon, Washington.
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The effects of global change upon United States air quality
NASA Astrophysics Data System (ADS)
Gonzalez-Abraham, R.; Avise, J.; Chung, S. H.; Lamb, B.; Salathé, E. P., Jr.; Nolte, C. G.; Loughlin, D.; Guenther, A.; Wiedinmyer, C.; Duhl, T.; Zhang, Y.; Streets, D. G.
2014-12-01
To understand more fully the effects of global changes on ambient concentrations of ozone and particulate matter with aerodynamic diameter smaller than 2.5 μm (PM2.5) in the US, we conducted a comprehensive modeling effort to evaluate explicitly the effects of changes in climate, biogenic emissions, land use, and global/regional anthropogenic emissions on ozone and PM2.5 concentrations and composition. Results from the ECHAM5 global climate model driven with the A1B emission scenario from the Intergovernmental Panel on Climate Change (IPCC) were downscaled using the Weather Research and Forecasting (WRF) model to provide regional meteorological fields. We developed air quality simulations using the Community Multiscale Air Quality Model (CMAQ) chemical transport model for two nested domains with 220 and 36 km horizontal grid cell resolution for a semi-hemispheric domain and a continental United States (US) domain, respectively. The semi-hemispheric domain was used to evaluate the impact of projected Asian emissions changes on US air quality. WRF meteorological fields were used to calculate current (2000s) and future (2050s) biogenic emissions using the Model of Emissions of Gases and Aerosols from Nature (MEGAN). For the semi-hemispheric domain CMAQ simulations, present-day global emissions inventories were used and projected to the 2050s based on the IPCC A1B scenario. Regional anthropogenic emissions were obtained from the US Environmental Protection Agency National Emission Inventory 2002 (EPA NEI2002) and projected to the future using the MARKet ALlocation (MARKAL) energy system model assuming a business as usual scenario that extends current decade emission regulations through 2050. Our results suggest that daily maximum 8 h average ozone (DM8O) concentrations will increase in a range between 2 to 12 ppb across most of the continental US, with the highest increase in the South, Central, and Midwest regions of the US, due to increases in temperature, enhanced
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Evaluation of the Community Multi-scale Air Quality (CMAQ) Model Version 5.1
The Community Multiscale Air Quality (CMAQ) model is a state-of-the-science air quality model that simulates the emission, transport and fate of numerous air pollutants, including ozone and particulate matter. The Computational Exposure Division (CED) of the U.S. Environmental Pr...
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Overview and Evaluation of the Community Multiscale Air Quality Model Version 5.2
The Community Multiscale Air Quality (CMAQ) model is a state-of-the-science air quality model that simulates the emission, transport and fate of numerous air pollutants, including ozone and particulate matter. The Computational Exposure Division (CED) of the U.S. Environmental Pr...
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Evaluation of the Community Multi-scale Air Quality (CMAQ) Model Version 5.2
The Community Multiscale Air Quality (CMAQ) model is a state-of-the-science air quality model that simulates the emission, transport and fate of numerous air pollutants, including ozone and particulate matter. The Computational Exposure Division (CED) of the U.S. Environmental Pr...
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Association of trends in US ambient air quality and cardiovascular mortality for 2000-2010
With the implementation of the Clean Air Act’s National Ambient Air Quality Standards, air quality in the United States has notably improved. Here we investigate whether declining levels of air pollutants are associated with improvements in human health. We examine the re...
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40 CFR 52.2630 - Prevention of significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
.... Skie, EPA, dated May 18, 1989, Charles A. Collins, Administrator of the Air Quality Divisions stated: * * * The Division, will, as a matter of practice, utilize the “Guideline on Air Quality Models” as revised, including Supplement A, in all PSD permit application reviews. The Division will utilize any future...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-07-13
...EPA is proposing a limited approval and a limited disapproval of a revision to the West Virginia State Implementation Plan (SIP) submitted by the State of West Virginia through the West Virginia Department of Environmental Protection (WVDEP) on June 18, 2008, that addresses regional haze for the first implementation period. This revision addresses the requirements of the Clean Air Act (CAA) and EPA's rules that require states to prevent any future, and remedy any existing, anthropogenic impairment of visibility in mandatory Class I areas caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the ``regional haze program''). States are required to assure reasonable progress toward the national goal of achieving natural visibility conditions in Class I areas. EPA is proposing a limited approval of this SIP revision to implement the regional haze requirements for West Virginia on the basis that the revision, as a whole, strengthens the West Virginia SIP. Also in this action, EPA is proposing a limited disapproval of this same SIP revision because of the deficiencies in the State's June 2008 regional haze SIP submittal arising from the remand by the U.S. Court of Appeals for the District of Columbia (D.C. Circuit) to EPA of the Clean Air Interstate Rule (CAIR). EPA is also proposing to approve this revision as meeting the requirements of 110(a)(2)(D)(i)(II) and 110(a)(2)(J), relating to visibility protection for the 1997 8-Hour Ozone National Ambient Air Quality Standard (NAAQS) and the 1997 and 2006 fine particulate matter (PM2.5) NAAQS.
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Proposed Cross-State Air Pollution Rule (75 FR 45210)
EPA proposes identifying and limiting emissions within 32 states in the eastern United States that affect the ability of downwind states to attain and maintain compliance with fine particulate matter and ozone national ambient air quality standards.
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Visual air quality simulation techniques
NASA Astrophysics Data System (ADS)
Molenar, John V.; Malm, William C.; Johnson, Christopher E.
Visual air quality is primarily a human perceptual phenomenon beginning with the transfer of image-forming information through an illuminated, scattering and absorbing atmosphere. Visibility, especially the visual appearance of industrial emissions or the degradation of a scenic view, is the principal atmospheric characteristic through which humans perceive air pollution, and is more sensitive to changing pollution levels than any other air pollution effect. Every attempt to quantify economic costs and benefits of air pollution has indicated that good visibility is a highly valued and desired environmental condition. Measurement programs can at best approximate the state of the ambient atmosphere at a few points in a scenic vista viewed by an observer. To fully understand the visual effect of various changes in the concentration and distribution of optically important atmospheric pollutants requires the use of aerosol and radiative transfer models. Communication of the output of these models to scientists, decision makers and the public is best done by applying modern image-processing systems to generate synthetic images representing the modeled air quality conditions. This combination of modeling techniques has been under development for the past 15 yr. Initially, visual air quality simulations were limited by a lack of computational power to simplified models depicting Gaussian plumes or uniform haze conditions. Recent explosive growth in low cost, high powered computer technology has allowed the development of sophisticated aerosol and radiative transfer models that incorporate realistic terrain, multiple scattering, non-uniform illumination, varying spatial distribution, concentration and optical properties of atmospheric constituents, and relative humidity effects on aerosol scattering properties. This paper discusses these improved models and image-processing techniques in detail. Results addressing uniform and non-uniform layered haze conditions in both
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Craig, Lorraine; Krewski, Dan; Samet, Jonathan; Shortreed, John; van Bree, Leendert; Krupnick, Alan J
2008-01-01
This statement is the result of discussions held at the 2005 NERAM IV Colloquium "International Perspectives on Air Quality: Risk Management Principles for Policy Development" and represents the collective views of 35 delegates, including international air quality policy analysts, academics, nongovernmental organizations, industry representatives, and decision makers from Mexico, Canada, the United States, the United Kingdom, Brazil, Hong Kong, and The Netherlands on principles for global air quality management. The objective of the colloquium was to "establish principles for air quality management based on the identification of international best practice in air quality policy development and implementation." This statement represents the main findings of a breakout group discussion session, presentations of an international panel of speakers from Canada, the United States, Mexico, and Hong Kong and views of the delegates expressed in plenary discussions. NERAM undertook a transparent process to try to ensure that the statement would accurately reflect the conference discussions, including documenting the proceedings and inviting delegates' comments on draft versions of the statement.
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DeForest Hauser, Cindy; Buckley, Alexandra; Porter, Juliana
2015-08-01
Charlotte, in Mecklenburg County, North Carolina, was ranked in the top ten cities with the worst air quality for ozone in the United States by the American Lung Association from 2009 to 2011. Nearby counties that may experience similar air quality do not have state or county monitors. This study utilized NOx and ozone Ogawa passive samplers and community scientists to monitor air quality in five counties surrounding Charlotte and increase public engagement in air quality issues. Community scientists deployed samplers weekly at a residential site within each county. Samples were analyzed using spectrophotometry and ion chromatography. Elevated NOx concentrations were observed in four of the five counties relative to those with existing monitors. Ozone concentrations showed little county to county variation, except Iredell and Cabarrus which had higher concentrations than Rowan. Community involvement in this work led to an increase in local dissemination of the results, thus increasing air quality awareness. Copyright © 2014 Elsevier Ltd. All rights reserved.
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Impacts of Climate Policy on Regional Air Quality, Health, and Air Quality Regulatory Procedures
NASA Astrophysics Data System (ADS)
Thompson, T. M.; Selin, N. E.
2011-12-01
Both the changing climate, and the policy implemented to address climate change can impact regional air quality. We evaluate the impacts of potential selected climate policies on modeled regional air quality with respect to national pollution standards, human health and the sensitivity of health uncertainty ranges. To assess changes in air quality due to climate policy, we couple output from a regional computable general equilibrium economic model (the US Regional Energy Policy [USREP] model), with a regional air quality model (the Comprehensive Air Quality Model with Extensions [CAMx]). USREP uses economic variables to determine how potential future U.S. climate policy would change emissions of regional pollutants (CO, VOC, NOx, SO2, NH3, black carbon, and organic carbon) from ten emissions-heavy sectors of the economy (electricity, coal, gas, crude oil, refined oil, energy intensive industry, other industry, service, agriculture, and transportation [light duty and heavy duty]). Changes in emissions are then modeled using CAMx to determine the impact on air quality in several cities in the Northeast US. We first calculate the impact of climate policy by using regulatory procedures used to show attainment with National Ambient Air Quality Standards (NAAQS) for ozone and particulate matter. Building on previous work, we compare those results with the calculated results and uncertainties associated with human health impacts due to climate policy. This work addresses a potential disconnect between NAAQS regulatory procedures and the cost/benefit analysis required for and by the Clean Air Act.
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ERIC Educational Resources Information Center
Baldwin Union Free School District, NY.
This manual identifies ways to improve a school's indoor air quality (IAQ) and discusses practical actions that can be carried out by school staff in managing air quality. The manual includes discussions of the many sources contributing to school indoor air pollution and the preventive planning for each including renovation and repair work,…
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Poor Air Quality Expected for New England on May 17-18, 2017
New England state air quality forecasters are predicting air quality that is unhealthy for sensitive groups, due to ground-level ozone, in much of CT, northern RI & portions of central and southeastern MA (excluding the Cape and the Islands) for May 17.
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AIR CLEANING FOR ACCEPTABLE INDOOR AIR QUALITY
The paper discusses air cleaning for acceptable indoor air quality. ir cleaning has performed an important role in heating, ventilation, and air-conditioning systems for many years. raditionally, general ventilation air-filtration equipment has been used to protect cooling coils ...
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Air Quality Index (AQI) -- A Guide to Air Quality and Your Health
... Guide for Ozone Air Quality Guide for Particle Pollution Other AirNow Publications Other AirNow Publications En Español ... the Clean Air Act: ground-level ozone, particle pollution (also known as particulate matter), carbon monoxide, sulfur ...
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Using aircraft and satellite observations to improve regulatory air quality models
NASA Astrophysics Data System (ADS)
Canty, T. P.; Vinciguerra, T.; Anderson, D. C.; Carpenter, S. F.; Goldberg, D. L.; Hembeck, L.; Montgomery, L.; Liu, X.; Salawitch, R. J.; Dickerson, R. R.
2014-12-01
Federal and state agencies rely on EPA approved models to develop attainment strategies that will bring states into compliance with the National Ambient Air Quality Standards (NAAQS). We will describe modifications to the Community Multi-Scale Air Quality (CMAQ) model and Comprehensive Air Quality Model with Extensions (CAMx) frameworks motivated by analysis of NASA satellite and aircraft measurements. Observations of tropospheric column NO2 from OMI have already led to the identification of an important deficiency in the chemical mechanisms used by models; data collected during the DISCOVER-AQ field campaign has been instrumental in devising an improved representation of the chemistry of nitrogen species. Our recent work has focused on the use of: OMI observations of tropospheric O3 to assess and improve the representation of boundary conditions used by AQ models, OMI NO2 to derive a top down NOx emission inventory from commercial shipping vessels that affect air quality in the Eastern U.S., and OMI HCHO to assess the C5H8 emission inventories provided by bioegenic emissions models. We will describe how these OMI-driven model improvements are being incorporated into the State Implementation Plans (SIPs) being prepared for submission to EPA in summer 2015 and how future modeling efforts may be impacted by our findings.
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Air Quality and Heart Health: Managing an Emerging ...
Dr. Cascio will share with a broad range of federal agencies current understanding of the links between air quality and cardiovascular health. The key facts include that air pollution contributes a high attributable health burden. That certain well-defined vulnerable subpopulations are at higher risk. At-risk populations include those with heart disease, lung disease and diabetes, older adults, children and individuals living in low socioeconomic neighborhoods. There is no established threshold level for safe long-term exposure to air particle pollution, and some of the basic biological mechanisms that account for adverse health effects are now known. This knowledge is giving us insight into how we might mitigate the effects apart from the regulatory efforts to improve overall air quality. Moreover, the work that each State has done to improve air quality has resulted in improved health outcomes including cardiovascular outcomes, and longer lives. The presentation will address: 1) What do we know? 2) Who are the at-risk populations? 3) What can communities do to reduce risk? 4) What can healthcare professionals do to reduce risk of the at-risk population? And 5) What tools are available to help healthcare professionals and their patients reduce exposure and risk from air pollutants? The talk will feature a description of the Air Quality Index and associated EPA tools and health information that can be used by health care providers to educate their at-ris
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NASA Astrophysics Data System (ADS)
Wolfe, P. J.; Selin, N. E.; Barrett, S. R. H.
2015-12-01
While leaded fuels for automobiles were phased-out of use in the United States by 1996, lead (Pb) continues to be used as an anti-knock additive for piston-driven aircraft. We model the annual concentration of atmospheric lead attributable to piston driven aircraft emissions in the continental United States using the Community Multi-scale Air Quality (CMAQ) model. Using aircraft emissions inventories for 2008, we then calculate annual economic damages from lead as lifetime employment losses for a one-year cohort exposed to elevated atmospheric lead concentrations using a range of concentration response functions from literature. Mean and median estimates of annual damages attributable to lifetime lost earnings are 1.06 and 0.60 billion respectively. Economy-wide impacts of IQ-deficits on productivity and labor increase expected damages by 54%. Damages are sensitive to background lead concentrations; as emissions decrease from other sources, the damages attributable to aviation are expected to increase holding aviation emissions constant. The monetary impact of General Aviation lead emissions on the environment is the same order of magnitude as noise, climate change, and air quality degradation from all commercial operations.
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Rural southeast Texas air quality measurements during the 2006 Texas Air Quality Study.
Schade, Gunnar W; Khan, Siraj; Park, Changhyoun; Boedeker, Ian
2011-10-01
The authors conducted air quality measurements of the criteria pollutants carbon monoxide, nitrogen oxides, and ozone together with meteorological measurements at a park site southeast of College Station, TX, during the 2006 Texas Air Quality Study II (TexAQS). Ozone, a primary focus of the measurements, was above 80 ppb during 3 days and above 75 ppb during additional 8 days in summer 2006, suggestive of possible violations of the ozone National Ambient Air Quality Standard (NAAQS) in this area. In concordance with other air quality measurements during the TexAQS II, elevated ozone mixing ratios coincided with northerly flows during days after cold front passages. Ozone background during these days was as high as 80 ppb, whereas southerly air flows generally provided for an ozone background lower than 40 ppb. Back trajectory analysis shows that local ozone mixing ratios can also be strongly affected by the Houston urban pollution plume, leading to late afternoon ozone increases of as high as 50 ppb above background under favorable transport conditions. The trajectory analysis also shows that ozone background increases steadily the longer a southern air mass resides over Texas after entering from the Gulf of Mexico. In light of these and other TexAQS findings, it appears that ozone air quality is affected throughout east Texas by both long-range and regional ozone transport, and that improvements therefore will require at least a regionally oriented instead of the current locally oriented ozone precursor reduction policies.
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The role of vegetation in mitigating air quality impacts from ...
On Apri1 27-28, 2019, a multi-disciplinary group of researchers and po1icymakers met to discuss the state-of-the-science regarding the potential of roadside vegetation to mitigate near-road air quality impacts. Concerns over population exposures to traffic-generated pollutants near roads have grown with an increasing number of health studies reporting links between proximity to roads and adverse health effects. A recent EM article described how roadway design, including the presence of roadside vegetation, may be a means of mitigating air pollutant concentrations near roads. As a first step in evaluating this concept, representatives from government agencies, academia, state and local agencies, and non-governmental environmental organizations with expertise in air quality, urban forestry, ecosystem services, and environmental policy reviewed the current science and identified future activities in evaluating the potential role of vegetation in mitigating near-road air pollutant concentrations. journal article
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Air Quality Management Process Cycle
Air quality management are activities a regulatory authority undertakes to protect human health and the environment from the harmful effects of air pollution. The process of managing air quality can be illustrated as a cycle of inter-related elements.
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Opportunities to Improve Air Quality through Transportation Pricing Programs
This document is intended to give state and local air quality and transportation planners,elected government officials, and other interested parties background information on transportation pricing programs.
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[Air quality surveillance in France].
Téton, S; Robin, D; Genève, C
2009-10-01
As air quality has a direct impact on human health, its monitoring is imperative. In France, this task was entrusted by the government (Air Law of 1996) to organisations with territorial responsibility: the Registered Associations for the Surveillance of Air Quality. The type and level of pollution evolve: from industrial and sulphur pollution in the seventies, to urban and photochemical pollution today and to nanoparticles, pesticides and pollutants in buildings tomorrow. The tools, the skills and the roles of the different people involved in air quality control follow these sometimes rapid transitions in connection with an increasingly precise understanding of the relationship between health and the environment and of the considerable research on the subject. This article describes the mechanisms of air quality monitoring in France.
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NASA Technical Reports Server (NTRS)
Tong, Daniel; Pan, Li; Chen, Weiwei; Lamsal, Lok; Lee, Pius; Tang, Youhua; Kim, Hyuncheol; Kondragunta, Shobha; Stajner, Ivanka
2016-01-01
Satellite and ground observations detected large variability in nitrogen oxides (NOx) during the 2008 economic recession, but the impact of the recession on air quality has not been quantified. This study combines observed NOx trends and a regional chemical transport model to quantify the impact of the recession on surface ozone (O3) levels over the continental United States. The impact is quantified by simulating O3 concentrations under two emission scenarios: business-as-usual (BAU) and recession. In the BAU case, the emission projection from the Cross-State Air Pollution Rule is used to estimate the would-be NOx emission level in 2011. In the recession case, the actual NO2 trends observed from Air Quality System ground monitors and the Ozone Monitoring Instrument on the Aura satellite are used to obtain realistic changes in NOx emissions. The model prediction with the recession effect agrees better with ground O3 observations over time and space than the prediction with the BAU emission. The results show that the recession caused a 12ppbv decrease in surface O3 concentration over the eastern United States, a slight increase (0.51ppbv) over the Rocky Mountain region, and mixed changes in the Pacific West. The gain in air quality benefits during the recession, however, could be quickly offset by the much slower emission reduction rate during the post-recession period.
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NASA Technical Reports Server (NTRS)
Butler, C. M.; Hogge, J. E.
1978-01-01
Air quality sampling was conducted. Data for air quality parameters, recorded on written forms, punched cards or magnetic tape, are available for 1972 through 1975. Computer software was developed to (1) calculate several daily statistical measures of location, (2) plot time histories of data or the calculated daily statistics, (3) calculate simple correlation coefficients, and (4) plot scatter diagrams. Computer software was developed for processing air quality data to include time series analysis and goodness of fit tests. Computer software was developed to (1) calculate a larger number of daily statistical measures of location, and a number of daily monthly and yearly measures of location, dispersion, skewness and kurtosis, (2) decompose the extended time series model and (3) perform some goodness of fit tests. The computer program is described, documented and illustrated by examples. Recommendations are made for continuation of the development of research on processing air quality data.
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Code of Federal Regulations, 2010 CFR
2010-07-01
... 32 National Defense 6 2010-07-01 2010-07-01 false Air quality. 989.30 Section 989.30 National... ENVIRONMENTAL IMPACT ANALYSIS PROCESS (EIAP) § 989.30 Air quality. Section 176(c) of the Clean Air Act..., Air Quality Compliance. 10 10 See footnote 1 to § 989.1. ...
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Code of Federal Regulations, 2012 CFR
2012-07-01
... 32 National Defense 6 2012-07-01 2012-07-01 false Air quality. 989.30 Section 989.30 National... ENVIRONMENTAL IMPACT ANALYSIS PROCESS (EIAP) § 989.30 Air quality. Section 176(c) of the Clean Air Act..., Air Quality Compliance. 10 10 See footnote 1 to § 989.1. ...
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Code of Federal Regulations, 2014 CFR
2014-07-01
... 32 National Defense 6 2014-07-01 2014-07-01 false Air quality. 989.30 Section 989.30 National... ENVIRONMENTAL IMPACT ANALYSIS PROCESS (EIAP) § 989.30 Air quality. Section 176(c) of the Clean Air Act..., Air Quality Compliance. 10 10 See footnote 1 to § 989.1. ...
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Code of Federal Regulations, 2013 CFR
2013-07-01
... 32 National Defense 6 2013-07-01 2013-07-01 false Air quality. 989.30 Section 989.30 National... ENVIRONMENTAL IMPACT ANALYSIS PROCESS (EIAP) § 989.30 Air quality. Section 176(c) of the Clean Air Act..., Air Quality Compliance. 10 10 See footnote 1 to § 989.1. ...
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Code of Federal Regulations, 2011 CFR
2011-07-01
... 32 National Defense 6 2011-07-01 2011-07-01 false Air quality. 989.30 Section 989.30 National... ENVIRONMENTAL IMPACT ANALYSIS PROCESS (EIAP) § 989.30 Air quality. Section 176(c) of the Clean Air Act..., Air Quality Compliance. 10 10 See footnote 1 to § 989.1. ...
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Presentation slides provide background on model evaluation techniques. Also included in the presentation is an operational evaluation of 2001 Community Multiscale Air Quality (CMAQ) annual simulation, and an evaluation of PM2.5 for the CMAQ air quality forecast (AQF) ...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-10-16
... alleviate air pollution, thus reducing poor air quality days. EPA agrees with this commenter. The Sierra... decision vacating the Cross State Air Pollution Rule (CSAPR). The comments are provided in the dockets for..., the D.C. Circuit Court issued an opinion vacating the Cross State Air Pollution Rule (CSAPR), which is...
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This site provides information for air quality data analysts inside and outside EPA. Much of the information is in the form of documented analyses that support the review of the national air qualiyt standards.
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Improving and monitoring air quality.
DuPont, André
2018-05-01
Since the authorization of the Clean Air Act Amendments of 1990, the air quality in the USA has significantly improved because of strong public support. The lessons learned over the last 25 years are being shared with the policy analysts, technical professionals, and scientist who endeavor to improve air quality in their communities. This paper will review how the USA has achieved the "high" standard of air quality that was envisioned in the early 1990s. This document will describe SO 2 gas emission reduction technology and highlight operation of emission monitoring technology. This paper describes the basic process operation of an air pollution control scrubber. A technical review of measures required to operate and maintain a large-scale pollution control system will be described. Also, the author explains how quality assurance procedures in performance of continuous emission monitoring plays a significant role in reducing air pollution.
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77 FR 9532 - Air Quality Designations for the 2010 Primary Nitrogen Dioxide (NO2
Federal Register 2010, 2011, 2012, 2013, 2014
2012-02-17
...This rule establishes air quality designations for all areas in the United States for the 2010 Primary Nitrogen Dioxide (NO2) National Ambient Air Quality Standards (NAAQS). Based on air quality monitoring data, the EPA is issuing this rule to designate all areas of the country as ``unclassifiable/attainment'' for the 2010 NO2 NAAQS. The EPA is designating areas as ``unclassifiable/attainment'' to mean that available information does not indicate that the air quality in these areas exceeds the 2010 NO2 NAAQS.
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Development of indoor environmental index: Air quality index and thermal comfort index
NASA Astrophysics Data System (ADS)
Saad, S. M.; Shakaff, A. Y. M.; Saad, A. R. M.; Yusof, A. M.; Andrew, A. M.; Zakaria, A.; Adom, A. H.
2017-03-01
In this paper, index for indoor air quality (also known as IAQI) and thermal comfort index (TCI) have been developed. The IAQI was actually modified from previous outdoor air quality index (AQI) designed by the United States Environmental Protection Agency (US EPA). In order to measure the index, a real-time monitoring system to monitor indoor air quality level was developed. The proposed system consists of three parts: sensor module cloud, base station and service-oriented client. The sensor module cloud (SMC) contains collections of sensor modules that measures the air quality data and transmit the captured data to base station through wireless. Each sensor modules includes an integrated sensor array that can measure indoor air parameters like Carbon Dioxide, Carbon Monoxide, Ozone, Nitrogen Dioxide, Oxygen, Volatile Organic Compound and Particulate Matter. Temperature and humidity were also being measured in order to determine comfort condition in indoor environment. The result from several experiments show that the system is able to measure the air quality presented in IAQI and TCI in many indoor environment settings like air-conditioner, chemical present and cigarette smoke that may impact the air quality. It also shows that the air quality are changing dramatically, thus real-time monitoring system is essential.
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-03-23
... Protection, State Office Building, 79 Elm Street, Hartford, CT 06106- 1630; the Bureau of Air Quality Control... evaluation of the States' submittals? A. Emission Limits and Other Control Measures B. Ambient Air Quality Monitoring/Data System C. Program for Enforcement of Control Measures D. Interstate Transport E. Adequate...
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Use of Air Quality Observations by the National Air Quality Forecast Capability
NASA Astrophysics Data System (ADS)
Stajner, I.; McQueen, J.; Lee, P.; Stein, A. F.; Kondragunta, S.; Ruminski, M.; Tong, D.; Pan, L.; Huang, J. P.; Shafran, P.; Huang, H. C.; Dickerson, P.; Upadhayay, S.
2015-12-01
The National Air Quality Forecast Capability (NAQFC) operational predictions of ozone and wildfire smoke for the United States (U.S.) and predictions of airborne dust for continental U.S. are available at http://airquality.weather.gov/. NOAA National Centers for Environmental Prediction (NCEP) operational North American Mesoscale (NAM) weather predictions are combined with the Community Multiscale Air Quality (CMAQ) model to produce the ozone predictions and test fine particulate matter (PM2.5) predictions. The Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model provides smoke and dust predictions. Air quality observations constrain emissions used by NAQFC predictions. NAQFC NOx emissions from mobile sources were updated using National Emissions Inventory (NEI) projections for year 2012. These updates were evaluated over large U.S. cities by comparing observed changes in OMI NO2 observations and NOx measured by surface monitors. The rate of decrease in NOx emission projections from year 2005 to year 2012 is in good agreement with the observed changes over the same period. Smoke emissions rely on the fire locations detected from satellite observations obtained from NESDIS Hazard Mapping System (HMS). Dust emissions rely on a climatology of areas with a potential for dust emissions based on MODIS Deep Blue aerosol retrievals. Verification of NAQFC predictions uses AIRNow compilation of surface measurements for ozone and PM2.5. Retrievals of smoke from GOES satellites are used for verification of smoke predictions. Retrievals of dust from MODIS are used for verification of dust predictions. In summary, observations are the basis for the emissions inputs for NAQFC, they are critical for evaluation of performance of NAQFC predictions, and furthermore they are used in real-time testing of bias correction of PM2.5 predictions, as we continue to work on improving modeling and emissions important for representation of PM2.5.
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NASA Astrophysics Data System (ADS)
Gupta, Pawan
Fine particles (PM2.5, particles with aerodynamic diameter less than 2.5 mum) can penetrate deep inside the human lungs and recent scientific studies have shown thousands of deaths occur each year around the world, prematurely, due to a high concentration of particulate matter. Therefore, monitoring and forecasting of surface level fine particulate matter air quality is very important. Typically air quality measurements are made from ground stations. In recent years, linear regression relationships between satellite derived aerosol optical thickness (AOT) and surface measured PM2.5 mass concentration are formed and used to estimate PM2.5 in the areas where surface measurements are not available. This type of simple linear relationships varies with regions and seasons, and does not provide accurate enough estimation of surface level pollution and many studies have shown that AOT alone is not sufficient for PM2.5 mass concentration estimations. Furthermore, AOT represents aerosol loading in the entire column of the atmosphere whereas PM2.5 is measured at the surface; hence, the knowledge of vertical distribution of aerosols coupled with meteorology becomes critical in PM2.5 estimations. In this dissertation I used three years (2004-2006) of coincident hourly PM2.5, MODerate resolution Imaging Spectroradiometer (MODIS) derived AOT, and Rapid Update Cycle (RUC) analyzed meteorological fields to assess PM2.5 air quality in the Southeast United States. I explored the use of two-variate (TVM), multi-variate (MVM) and artificial neural network (ANN) methods for estimating PM2.5 over 85 stations in the region. First, satellite data were analyzed for sampling biases, quality, and impact of clouds. Results show that MODIS-Terra AOT data was available only about 50% of the days in any given month due to cloud over and unfavorable surface conditions, but this produced a sampling bias of less than 2 mugm-3. Results indicate that there is up to three fold improvements in the
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"Changes in US Regional Air Quality at 2030 Simulated Using RCP 6.0"
Recent improvements in air quality in the United States have been due to significant reductions in emissions of ozone and particulate matter (PM) precursors, and these downward emissions trends are expected to continue in the next few decades. To ensure that planned air quality ...
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Indoor Air Quality in Schools.
ERIC Educational Resources Information Center
Torres, Vincent M.
Asserting that the air quality inside schools is often worse than outdoor pollution, leading to various health complaints and loss of productivity, this paper details factors contributing to schools' indoor air quality. These include the design, operation, and maintenance of heating, ventilating, and air conditioning (HVAC) systems; building…
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78 FR 900 - Approval and Promulgation of Air Quality Implementation Plans; Alaska: Eagle River PM10
Federal Register 2010, 2011, 2012, 2013, 2014
2013-01-07
...-7] Approval and Promulgation of Air Quality Implementation Plans; Alaska: Eagle River PM 10... National Ambient Air Quality Standards (NAAQS) for particulate matter with an aerodynamic diameter less... under section 110 and part D of the CAA? D. Has the State demonstrated that the air quality improvement...
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Approved Air Quality Implementation Plans in The Virgin Islands
This site contains information about air quality regulations called State Implementation Plans (SIPs), Federal Implementation Plans (FIPs), and Tribal Implementation Plans (TIPs) approved by EPA within the U.S. Virgin Islands.
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Air Quality Impacts of Electrifying Vehicles and Equipment Across the United States.
Nopmongcol, Uarporn; Grant, John; Knipping, Eladio; Alexander, Mark; Schurhoff, Rob; Young, David; Jung, Jaegun; Shah, Tejas; Yarwood, Greg
2017-03-07
U.S.-wide air quality impacts of electrifying vehicles and off-road equipment are estimated for 2030 using 3-D photochemical air quality model and detailed emissions inventories. Electrification reduces tailpipe emissions and emissions from petroleum refining, transport, and storage, but increases electricity demand. The Electrification Case assumes approximately 17% of light duty and 8% of heavy duty vehicle miles traveled and from 17% to 79% of various off-road equipment types considered good candidates for electrification is powered by electricity. The Electrification Case raises electricity demand by 5% over the 2030 Base Case but nitrogen oxide (NO x ) emissions decrease by 209 thousand tons (3%) overall. Emissions of other criteria pollutants also decrease. Air quality benefits of electrification are modest, mostly less than 1 ppb for ozone and 0.5 μg m -3 for fine particulate matter (PM 2.5 ), but widespread. The largest reductions for ozone and PM occur in urban areas due to lower mobile source emissions. Electrifying off-road equipment yields more benefits than electrifying on-road vehicles. Reduced crude oil imports and associated marine vessel emissions cause additional benefits in port cities. Changes in other gas and PM emissions, as well as impacts on acid and nutrient deposition, are discussed.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-06-24
... Determination To Defer Sanctions; California; South Coast Air Quality Management District AGENCY: Environmental... Quality Management District's (SCAQMD) portion of the California State Implementation Plan (SIP) published... California submitted the ``South Coast Air Quality Management District Proposed Contingency Measures for the...
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Environmental Quality and the U.S. Power Sector: Air Quality, Land Use and Environmental Justice
DOE Office of Scientific and Technical Information (OSTI.GOV)
Massetti, Emanuele; Brown, Marilyn Ann; Lapsa, Melissa Voss
This baseline report summarizes key environmental quality issues associated with electricity generation, transmission, distribution, and end use in the United States. Its scope includes non-greenhouse gas air pollution (i.e., sulfur dioxide, nitrogen oxides, particulate matter and hazardous air pollutants), land use, water pollution, ecological impacts, human health, and environmental justice. The discussion characterizes both current impacts and recent trends, as well as assessments of key drivers of change. For example, the air emissions section includes a quantitative decomposition analysis of the drivers of change in sulfur dioxide emissions reductions from coal-fired power plants. The report is divided into four topicalmore » sections: air emissions, land use and ecology, water quality, and environmental justice.« less
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Code of Federal Regulations, 2013 CFR
2013-07-01
... (Wisconsin) Interstate Air Quality Control Region. 81.71 Section 81.71 Protection of Environment... (Wisconsin) Interstate Air Quality Control Region. The Rockford (Illinois)-Janesville-Beloit (Wisconsin... County, Stephenson County, Winnebago County. In the State of Wisconsin: Rock County. ...
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Code of Federal Regulations, 2011 CFR
2011-07-01
... (Wisconsin) Interstate Air Quality Control Region. 81.71 Section 81.71 Protection of Environment... (Wisconsin) Interstate Air Quality Control Region. The Rockford (Illinois)-Janesville-Beloit (Wisconsin... County, Stephenson County, Winnebago County. In the State of Wisconsin: Rock County. ...
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Code of Federal Regulations, 2012 CFR
2012-07-01
... (Wisconsin) Interstate Air Quality Control Region. 81.71 Section 81.71 Protection of Environment... (Wisconsin) Interstate Air Quality Control Region. The Rockford (Illinois)-Janesville-Beloit (Wisconsin... County, Stephenson County, Winnebago County. In the State of Wisconsin: Rock County. ...
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Code of Federal Regulations, 2010 CFR
2010-07-01
... (Wisconsin) Interstate Air Quality Control Region. 81.71 Section 81.71 Protection of Environment... (Wisconsin) Interstate Air Quality Control Region. The Rockford (Illinois)-Janesville-Beloit (Wisconsin... County, Stephenson County, Winnebago County. In the State of Wisconsin: Rock County. ...
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Code of Federal Regulations, 2014 CFR
2014-07-01
... (Wisconsin) Interstate Air Quality Control Region. 81.71 Section 81.71 Protection of Environment... (Wisconsin) Interstate Air Quality Control Region. The Rockford (Illinois)-Janesville-Beloit (Wisconsin... County, Stephenson County, Winnebago County. In the State of Wisconsin: Rock County. ...
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Indoor Air Quality in Chemistry Laboratories.
ERIC Educational Resources Information Center
Hays, Steve M.
This paper presents air quality and ventilation data from an existing chemical laboratory facility and discusses the work practice changes implemented in response to deficiencies in ventilation. General methods for improving air quality in existing laboratories are presented and investigation techniques for characterizing air quality are…
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NASA Astrophysics Data System (ADS)
Lei, H.; Wang, J. X. L.
2014-08-01
To improve dust storm identification over the western United States, historical dust events measured by air quality and satellite observations are analyzed based on their characteristics in data sets of regular meteorology, satellite-based aerosol optical depth (AOD), and air quality measurements. Based on the prevailing weather conditions associated with dust emission, dust storm events are classified into the following four typical types: (1) The key feature of cold front-induced dust storms is their rapid process with strong dust emissions. (2) Events caused by meso- to small-scale weather systems have the highest levels of emissions. (3) Dust storms caused by tropical disturbances show a stronger air concentration of dust and last longer than those in (1) and (2). (4) Dust storms triggered by cyclogenesis last the longest. In this paper, sample events of each type are selected and examined to explore characteristics observed from in situ and remote-sensing measurements. These characteristics include the lasting period, surface wind speeds, areas affected, average loading on ground-based optical and/or air quality measurements, peak loading on ground-based optical and/or air quality measurements, and loading on satellite-based aerosol optical depth. Based on these analyses, we compare the characteristics of the same dust events captured in different data sets in order to define the dust identification criteria. The analyses show that the variability in mass concentrations captured by in situ measurements is consistent with the variability in AOD from stationary and satellite observations. Our analyses also find that different data sets are capable of identifying certain common characteristics, while each data set also provides specific information about a dust storm event. For example, the meteorological data are good at identifying the lasting period and area impacted by a dust event; the ground-based air quality and optical measurements can capture the peak
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Colorado Air Quality Control Regulations and Ambient Air Quality Standards.
ERIC Educational Resources Information Center
Colorado State Dept. of Health, Denver. Div. of Air Pollution Control.
Regulations and standards relative to air quality control in Colorado are defined in this publication. Presented first are definitions of terms, a statement of intent, and general provisions applicable to all emission control regulations adopted by the Colorado Air Pollution Control Commission. Following this, three regulations are enumerated: (1)…
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Air Quality Modeling and Forecasting over the United States Using WRF-Chem
NASA Astrophysics Data System (ADS)
Boxe, C.; Hafsa, U.; Blue, S.; Emmanuel, S.; Griffith, E.; Moore, J.; Tam, J.; Khan, I.; Cai, Z.; Bocolod, B.; Zhao, J.; Ahsan, S.; Gurung, D.; Tang, N.; Bartholomew, J.; Rafi, R.; Caltenco, K.; Rivas, M.; Ditta, H.; Alawlaqi, H.; Rowley, N.; Khatim, F.; Ketema, N.; Strothers, J.; Diallo, I.; Owens, C.; Radosavljevic, J.; Austin, S. A.; Johnson, L. P.; Zavala-Gutierrez, R.; Breary, N.; Saint-Hilaire, D.; Skeete, D.; Stock, J.; Salako, O.
2016-12-01
WRF-Chem is the Weather Research and Forecasting (WRF) model coupled with Chemistry. The model simulates the emission, transport, mixing, and chemical transformation of trace gases and aerosols simultaneously with the meteorology. The model is used for investigation of regional-scale air quality, field program analysis, and cloud-scale interactions between clouds and chemistry. The development of WRF-Chem is a collaborative effort among the community led by NOAA/ESRL scientists. The Official WRF-Chem web page is located at the NOAA web site. Our model development is closely linked with both NOAA/ESRL and DOE/PNNL efforts. Description of PNNL WRF-Chem model development is located at the PNNL web site as well as the PNNL Aerosol Modeling Testbed. High school and undergraduate students, representative of academic institutions throughout USA's Tri-State Area (New York, New Jersey, Connecticut), set up WRF-Chem on CUNY CSI's High Performance Computing Center. Students learned the back-end coding that governs WRF-Chems structure and the front-end coding that displays visually specified weather simulations and forecasts. Students also investigated the impact, to select baseline simulations/forecasts, due to the reaction, NO2 + OH + M → HOONO + M (k = 9.2 × 10-12 cm3 molecule-1 s-1, Mollner et al. 2010). The reaction of OH and NO2 to form gaseous nitric acid (HONO2) is among the most influential and in atmospheric chemistry. Till a few years prior, its rate coefficient remained poorly determined under tropospheric conditions because of difficulties in making laboratory measurements at 760 torr. These activities fosters student coding competencies and deep insights into weather forecast and air quality.
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40 CFR 52.270 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... applicable State plan for the State of California. (b) District PSD Plans. (1) The PSD rules for Sacramento... of PSD increments. (ii) Those projects which are major stationary sources or major modifications... 83-01, 5/6/83. (2) The PSD rules for North Coast Unified Air Quality Management District are approved...
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40 CFR 52.270 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... applicable State plan for the State of California. (b) District PSD Plans. (1) The PSD rules for Sacramento... of PSD increments. (ii) Those projects which are major stationary sources or major modifications... 83-01, 5/6/83. (2) The PSD rules for North Coast Unified Air Quality Management District are approved...
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40 CFR 52.270 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... applicable State plan for the State of California. (b) District PSD Plans. (1) The PSD rules for Sacramento... of PSD increments. (ii) Those projects which are major stationary sources or major modifications... 83-01, 5/6/83. (2) The PSD rules for North Coast Unified Air Quality Management District are approved...
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40 CFR 52.270 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... applicable State plan for the State of California. (b) District PSD Plans. (1) The PSD rules for Sacramento... of PSD increments. (ii) Those projects which are major stationary sources or major modifications... 83-01, 5/6/83. (2) The PSD rules for North Coast Unified Air Quality Management District are approved...
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Indoor Air Quality in Schools: Clean Air Is Good Business.
ERIC Educational Resources Information Center
Guarneiri, Michele A.
2003-01-01
Describes the effect of poor indoor air quality (IAQ) on student health, the cost of safeguarding good IAQ, the cause of poor IAQ in schools, how to tell whether a school has an IAQ problem, and how the U.S. Environmental Protection Agency can help schools improve indoor air quality though the use of their free "Indoor Air Quality Tools for…
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The climate and air-quality benefits of wind and solar power in the United States
NASA Astrophysics Data System (ADS)
Millstein, Dev; Wiser, Ryan; Bolinger, Mark; Barbose, Galen
2017-09-01
Wind and solar energy reduce combustion-based electricity generation and provide air-quality and greenhouse gas emission benefits. These benefits vary dramatically by region and over time. From 2007 to 2015, solar and wind power deployment increased rapidly while regulatory changes and fossil fuel price changes led to steep cuts in overall power-sector emissions. Here we evaluate how wind and solar climate and air-quality benefits evolved during this time period. We find cumulative wind and solar air-quality benefits of 2015 US$29.7-112.8 billion mostly from 3,000 to 12,700 avoided premature mortalities, and cumulative climate benefits of 2015 US$5.3-106.8 billion. The ranges span results across a suite of air-quality and health impact models and social cost of carbon estimates. We find that binding cap-and-trade pollutant markets may reduce these cumulative benefits by up to 16%. In 2015, based on central estimates, combined marginal benefits equal 7.3 ¢ kWh-1 (wind) and 4.0 ¢ kWh-1 (solar).
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Cost analysis of impacts of climate change on regional air quality.
Liao, Kuo-Jen; Tagaris, Efthimios; Russell, Armistead G; Amar, Praveen; He, Shan; Manomaiphiboon, Kasemsan; Woo, Jung-Hun
2010-02-01
Climate change has been predicted to adversely impact regional air quality with resulting health effects. Here a regional air quality model and a technology analysis tool are used to assess the additional emission reductions required and associated costs to offset impacts of climate change on air quality. Analysis is done for six regions and five major cities in the continental United States. Future climate is taken from a global climate model simulation for 2049-2051 using the Intergovernmental Panel on Climate Change (IPCC) A1B emission scenario, and emission inventories are the same as current ones to assess impacts of climate change alone on air quality and control expenses. On the basis of the IPCC A1B emission scenario and current control technologies, least-cost sets of emission reductions for simultaneously offsetting impacts of climate change on regionally averaged 4th highest daily maximum 8-hr average ozone and yearly averaged PM2.5 (particulate matter [PM] with an aerodynamic diameter less than 2.5 microm) for the six regions examined are predicted to range from $36 million (1999$) yr(-1) in the Southeast to $5.5 billion yr(-1) in the Northeast. However, control costs to offset climate-related pollutant increases in urban areas can be greater than the regional costs because of the locally exacerbated ozone levels. An annual cost of $4.1 billion is required for offsetting climate-induced air quality impairment in 2049-2051 in the five cities alone. Overall, an annual cost of $9.3 billion is estimated for offsetting climate change impacts on air quality for the six regions and five cities examined. Much of the additional expense is to reduce increased levels of ozone. Additional control costs for offsetting the impacts everywhere in the United States could be larger than the estimates in this study. This study shows that additional emission controls and associated costs for offsetting climate impacts could significantly increase currently estimated
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-01-22
... Promulgation of Air Quality Implementation Plans; New Mexico; Infrastructure and Interstate Transport.... SUMMARY: EPA is approving the submittal from the State of New Mexico pursuant to the Clean Air Act (CAA or..., and enforce the 2006 fine particulate matter (PM 2.5 ) national ambient air quality standards (NAAQS...
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How Will Air Quality Change in South Asia by 2050?
NASA Astrophysics Data System (ADS)
Kumar, Rajesh; Barth, Mary C.; Pfister, G. G.; Delle Monache, L.; Lamarque, J. F.; Archer-Nicholls, S.; Tilmes, S.; Ghude, S. D.; Wiedinmyer, C.; Naja, M.; Walters, S.
2018-02-01
Exposure to unhealthy air causes millions of premature deaths and damages crops sufficient to feed a large portion of the South Asian population every year. However, little is known about how future air quality in South Asia will respond to changing human activities. Here we examine the combined effect of changes in climate and air pollutant emissions projected by the Representative Concentration Pathways (RCP) 8.5 and RCP6.0 on air quality of South Asia in 2050 using a state-of-the-science Nested Regional Climate model with Chemistry (NRCM-Chem). RCP8.5 and RCP6.0 are selected to represent scenarios of highest and lowest air pollution in South Asia by 2050. NRCM-Chem shows the ability to capture observed key features of variability in meteorological parameters, ozone and related gases, and aerosols. NRCM-Chem results show that surface ozone and particulate matter of less than 2.5 μm in diameter will increase significantly by midcentury in South Asia under the RCP8.5 but remain similar to present day under RCP6.0. No RCP suggest an improvement in air pollution in South Asia by midcentury. Under RCP8.5, the frequency of air pollution events is predicted to increase by 20-120 days per year in 2050 compared to the present-day conditions, with particulate matter of less than 2.5 μm in diameter predicted to breach the World Health Organization ambient air quality guidelines on an almost daily basis in many parts of South Asia. These results indicate that while the RCP scenarios project a global improvement in air quality, they generally result in degrading air quality in South Asia.
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Projecting Changes in Climate & Air Quality for the Southeastern U.S.
Recent improvements in air quality in the United States have been due to significant reductions in emissions of precursors of ozone and particulate matter (PM), and these downward emissions trends are expected to continue in the next few decades. To ensure that planned air quali...
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Parents' Guide to School Indoor Air Quality.
ERIC Educational Resources Information Center
Healthy Schools Network, Inc., Albany, NY.
This parents' guide presents articles on school indoor air pollution, children's health and the symptoms of indoor air pollution, and how schools can improve their air quality. Also included are tips on what to do if the school ignores air quality problems, and some examples of what school districts should be doing to improve their air quality.…
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Ambient air pollution and semen quality.
Nobles, Carrie J; Schisterman, Enrique F; Ha, Sandie; Kim, Keewan; Mumford, Sunni L; Buck Louis, Germaine M; Chen, Zhen; Liu, Danping; Sherman, Seth; Mendola, Pauline
2018-05-01
Ambient air pollution is associated with systemic increases in oxidative stress, to which sperm are particularly sensitive. Although decrements in semen quality represent a key mechanism for impaired fecundability, prior research has not established a clear association between air pollution and semen quality. To address this, we evaluated the association between ambient air pollution and semen quality among men with moderate air pollution exposure. Of 501 couples in the LIFE study, 467 male partners provided one or more semen samples. Average residential exposure to criteria air pollutants and fine particle constituents in the 72 days before ejaculation was estimated using modified Community Multiscale Air Quality models. Generalized estimating equation models estimated the association between air pollutants and semen quality parameters (volume, count, percent hypo-osmotic swollen, motility, sperm head, morphology and sperm chromatin parameters). Models adjusted for age, body mass index, smoking and season. Most associations between air pollutants and semen parameters were small. However, associations were observed for an interquartile increase in fine particulates ≤2.5 µm and decreased sperm head size, including -0.22 (95% CI -0.34, -0.11) µm 2 for area, -0.06 (95% CI -0.09, -0.03) µm for length and -0.09 (95% CI -0.19, -0.06) µm for perimeter. Fine particulates were also associated with 1.03 (95% CI 0.40, 1.66) greater percent sperm head with acrosome. Air pollution exposure was not associated with semen quality, except for sperm head parameters. Moderate levels of ambient air pollution may not be a major contributor to semen quality. Published by Elsevier Inc.
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NASA Astrophysics Data System (ADS)
Boersma, F. F.; Verstraeten, W. W.; Williams, J. E.; Neu, J. L.; Bowman, K. W.; Worden, J.
2014-12-01
Tropospheric ozone is an important greenhouse gas and a global air pollutant originating from photo-chemical oxidation of ozone precursors in the presence of NOX. Eastern Asia has the fastest growing anthropogenic emissions in the world, possibly affecting both the pollution in the local troposphere as well as in the trans-Pacific region. Local measurements over Asia show that tropospheric ozone has increased by 1 to 3% per year since the start of the millennium. This increase is often invoked to explain positive ozone trends observed in western United States, but to date there is no unambiguous evidence showing that enhanced Asian pollution is responsible for these trends. Here we interpret satellite measurements of tropospheric ozone and its precursor nitrate dioxide from the Aura Tropospheric Emission Spectrometer (TES) and Ozone Monitoring Instrument (OMI) using the TM5 global chemistry-transport model to directly show that tropospheric ozone over China has increased by ~10% from 2005-2010 in response to both a ~15% rise in Chinese emissions and an increased downward ozone transport from the stratosphere. What is more, we demonstrate that Chinese export of ozone and its precursors have offset one-third of the reduction in free tropospheric ozone over the western United States that should have occurred during 2005-2010 via emissions reductions associated with air quality policies in the United States. The issue of export and long-range transport of pollution from other countries indicates that global efforts may be required to address both the global as well as the regional air quality and climate change.
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Global Air Quality and Climate
NASA Technical Reports Server (NTRS)
Fiore, Arlene M.; Naik, Vaishali; Steiner, Allison; Unger, Nadine; Bergmann, Dan; Prather, Michael; Righi, Mattia; Rumbold, Steven T.; Shindell, Drew T.; Skeie, Ragnhild B.;
2012-01-01
Emissions of air pollutants and their precursors determine regional air quality and can alter climate. Climate change can perturb the long-range transport, chemical processing, and local meteorology that influence air pollution. We review the implications of projected changes in methane (CH4), ozone precursors (O3), and aerosols for climate (expressed in terms of the radiative forcing metric or changes in global surface temperature) and hemispheric-to-continental scale air quality. Reducing the O3 precursor CH4 would slow near-term warming by decreasing both CH4 and tropospheric O3. Uncertainty remains as to the net climate forcing from anthropogenic nitrogen oxide (NOx) emissions, which increase tropospheric O3 (warming) but also increase aerosols and decrease CH4 (both cooling). Anthropogenic emissions of carbon monoxide (CO) and non-CH4 volatile organic compounds (NMVOC) warm by increasing both O3 and CH4. Radiative impacts from secondary organic aerosols (SOA) are poorly understood. Black carbon emission controls, by reducing the absorption of sunlight in the atmosphere and on snow and ice, have the potential to slow near-term warming, but uncertainties in coincident emissions of reflective (cooling) aerosols and poorly constrained cloud indirect effects confound robust estimates of net climate impacts. Reducing sulfate and nitrate aerosols would improve air quality and lessen interference with the hydrologic cycle, but lead to warming. A holistic and balanced view is thus needed to assess how air pollution controls influence climate; a first step towards this goal involves estimating net climate impacts from individual emission sectors. Modeling and observational analyses suggest a warming climate degrades air quality (increasing surface O3 and particulate matter) in many populated regions, including during pollution episodes. Prior Intergovernmental Panel on Climate Change (IPCC) scenarios (SRES) allowed unconstrained growth, whereas the Representative
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Global air quality and climate.
Fiore, Arlene M; Naik, Vaishali; Spracklen, Dominick V; Steiner, Allison; Unger, Nadine; Prather, Michael; Bergmann, Dan; Cameron-Smith, Philip J; Cionni, Irene; Collins, William J; Dalsøren, Stig; Eyring, Veronika; Folberth, Gerd A; Ginoux, Paul; Horowitz, Larry W; Josse, Béatrice; Lamarque, Jean-François; MacKenzie, Ian A; Nagashima, Tatsuya; O'Connor, Fiona M; Righi, Mattia; Rumbold, Steven T; Shindell, Drew T; Skeie, Ragnhild B; Sudo, Kengo; Szopa, Sophie; Takemura, Toshihiko; Zeng, Guang
2012-10-07
Emissions of air pollutants and their precursors determine regional air quality and can alter climate. Climate change can perturb the long-range transport, chemical processing, and local meteorology that influence air pollution. We review the implications of projected changes in methane (CH(4)), ozone precursors (O(3)), and aerosols for climate (expressed in terms of the radiative forcing metric or changes in global surface temperature) and hemispheric-to-continental scale air quality. Reducing the O(3) precursor CH(4) would slow near-term warming by decreasing both CH(4) and tropospheric O(3). Uncertainty remains as to the net climate forcing from anthropogenic nitrogen oxide (NO(x)) emissions, which increase tropospheric O(3) (warming) but also increase aerosols and decrease CH(4) (both cooling). Anthropogenic emissions of carbon monoxide (CO) and non-CH(4) volatile organic compounds (NMVOC) warm by increasing both O(3) and CH(4). Radiative impacts from secondary organic aerosols (SOA) are poorly understood. Black carbon emission controls, by reducing the absorption of sunlight in the atmosphere and on snow and ice, have the potential to slow near-term warming, but uncertainties in coincident emissions of reflective (cooling) aerosols and poorly constrained cloud indirect effects confound robust estimates of net climate impacts. Reducing sulfate and nitrate aerosols would improve air quality and lessen interference with the hydrologic cycle, but lead to warming. A holistic and balanced view is thus needed to assess how air pollution controls influence climate; a first step towards this goal involves estimating net climate impacts from individual emission sectors. Modeling and observational analyses suggest a warming climate degrades air quality (increasing surface O(3) and particulate matter) in many populated regions, including during pollution episodes. Prior Intergovernmental Panel on Climate Change (IPCC) scenarios (SRES) allowed unconstrained growth, whereas
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Code of Federal Regulations, 2010 CFR
2010-07-01
... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Air quality. 75.321 Section 75.321 Mineral... SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.321 Air quality. (a)(1) The air in areas where... air current in these areas shall be sufficient to dilute, render harmless, and carry away flammable...
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Code of Federal Regulations, 2011 CFR
2011-07-01
... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Air quality. 75.321 Section 75.321 Mineral... SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.321 Air quality. (a)(1) The air in areas where... air current in these areas shall be sufficient to dilute, render harmless, and carry away flammable...
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Code of Federal Regulations, 2013 CFR
2013-07-01
... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Air quality. 75.321 Section 75.321 Mineral... SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.321 Air quality. (a)(1) The air in areas where... air current in these areas shall be sufficient to dilute, render harmless, and carry away flammable...
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Code of Federal Regulations, 2014 CFR
2014-07-01
... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Air quality. 75.321 Section 75.321 Mineral... SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.321 Air quality. (a)(1) The air in areas where... air current in these areas shall be sufficient to dilute, render harmless, and carry away flammable...
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Code of Federal Regulations, 2012 CFR
2012-07-01
... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Air quality. 75.321 Section 75.321 Mineral... SAFETY STANDARDS-UNDERGROUND COAL MINES Ventilation § 75.321 Air quality. (a)(1) The air in areas where... air current in these areas shall be sufficient to dilute, render harmless, and carry away flammable...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-06-19
... Promulgation of Air Quality Implementation Plans; Michigan; PSD Regulations AGENCY: Environmental Protection... Significant Deterioration (PSD) construction permit program of State of Michigan's State Implementation Plan (SIP) to meet the Clean Air Act (CAA) requirements for PSD in Class I Areas attaining the National...
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CityAir app: Mapping air-quality perception using people as sensors
NASA Astrophysics Data System (ADS)
Castell, Nuria; Fredriksen, Mirjam; Cole-Hunter, Thomas; Robinson, Johanna; Keune, Hans; Nieuwenhuijsen, Mark; Bartonova, Alena
2016-04-01
Outdoor air pollution is a major environmental health problem affecting all people in developed and developing countries alike. Ambient (outdoor) air pollution in both cities and rural areas was estimated to cause 3.7 million premature deaths worldwide in 2012. In modern society, people are expending an increasing amount of time in polluted urban environments, thus increasing their exposure and associated health responses. Some cities provide information about air pollution levels to their citizens using air quality monitoring networks. However, due to their high cost and maintenance, the density of the monitoring networks is very low and not capable to capture the high temporal and spatial variability of air pollution. Thus, the citizen lacks a specific answer to the question of "how the air quality is in our surroundings". In the framework of the EU-funded CITI-SENSE project the innovative concept of People as Sensors is being applied to the field of outdoor air pollution. This is being done in eight European cities, including Barcelona, Belgrade, Edinburgh, Haifa, Ljubljana, Oslo, Ostrava and Vienna. People as Sensors defines a measurement model, in which measurements are not only taken by hardware sensors, but in which also humans can contribute with their individual "measurements" such as their subjective perception of air quality and other personal observations. In order to collect the personal observations a mobile app, CityAir, has been developed. CityAir allows citizens to rate the air quality in their surroundings with colour at their current location: green if air quality is very good, yellow if air quality is good, orange if air quality is poor and red if air quality is very poor. The users have also the possibility of indicating the source of pollution (i.e. traffic, industry, wood burning) and writing a comment. The information is on-line and accessible for other app users, thus contributing to create an air-quality map based on citizens' perception
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Community Multiscale Air Quality Modeling System (CMAQ)
CMAQ is a computational tool used for air quality management. It models air pollutants including ozone, particulate matter and other air toxics to help determine optimum air quality management scenarios.
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A cost-efficiency and health benefit approach to improve urban air quality.
Miranda, A I; Ferreira, J; Silveira, C; Relvas, H; Duque, L; Roebeling, P; Lopes, M; Costa, S; Monteiro, A; Gama, C; Sá, E; Borrego, C; Teixeira, J P
2016-11-01
When ambient air quality standards established in the EU Directive 2008/50/EC are exceeded, Member States are obliged to develop and implement Air Quality Plans (AQP) to improve air quality and health. Notwithstanding the achievements in emission reductions and air quality improvement, additional efforts need to be undertaken to improve air quality in a sustainable way - i.e. through a cost-efficiency approach. This work was developed in the scope of the recently concluded MAPLIA project "Moving from Air Pollution to Local Integrated Assessment", and focuses on the definition and assessment of emission abatement measures and their associated costs, air quality and health impacts and benefits by means of air quality modelling tools, health impact functions and cost-efficiency analysis. The MAPLIA system was applied to the Grande Porto urban area (Portugal), addressing PM10 and NOx as the most important pollutants in the region. Four different measures to reduce PM10 and NOx emissions were defined and characterized in terms of emissions and implementation costs, and combined into 15 emission scenarios, simulated by the TAPM air quality modelling tool. Air pollutant concentration fields were then used to estimate health benefits in terms of avoided costs (external costs), using dose-response health impact functions. Results revealed that, among the 15 scenarios analysed, the scenario including all 4 measures lead to a total net benefit of 0.3M€·y(-1). The largest net benefit is obtained for the scenario considering the conversion of 50% of open fire places into heat recovery wood stoves. Although the implementation costs of this measure are high, the benefits outweigh the costs. Research outcomes confirm that the MAPLIA system is useful for policy decision support on air quality improvement strategies, and could be applied to other urban areas where AQP need to be implemented and monitored. Copyright © 2016. Published by Elsevier B.V.
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John J. Qu; Xianjun Hao; Ruixin Yang; Swarvanu Dasgupta; Sanjeeb Bhoi; Menas Kafatos
1999-01-01
Fire eniissions, smoke dispersiotl. ancl air quality are very important for fire fighting and planing of prescribed burning. BlueskyRATNS (BSR) is a comprehenisive and state-of-the-art Decision Support System (DSS) for fire managers and air quality managers to plan fiiels treatments and support state air qiiality smoke regulatory actions, especially related to...
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Effect of low emission sources on air quality in Cracow
DOE Office of Scientific and Technical Information (OSTI.GOV)
Nedoma, J.
1995-12-31
The paper presents calculation of power engineering low emission and results of stimulation of the effect of this emission on air quality in Cracow, Poland. It has been stated that the segment of low emission in central areas of the town makes up ca. 40% of the observed concentration of sulfur dioxide. Furthermore it has been stated that the capital investment must be concentrated in the central part of the town in order to reach noticeable improvement of air quality in Cracow. Neither the output of a separate power source nor the emission level and its individual harmful effect, butmore » the location of the source and especially packing density of the sources must decide the priority of upgrading actions.« less
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School Indoor Air Quality Best Management Practices Manual.
ERIC Educational Resources Information Center
Hall, Richard; Ellis, Richard; Hardin, Tim
This manual, written in response to requirements of the Washington State legislature, focuses on practices which can be undertaken during the siting, design, construction, or renovation of a school, recommends practices to help ensure good indoor air quality during building occupancy, and suggests protocols and useful reference documents for…
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NASA Astrophysics Data System (ADS)
Demuth, Dustin; Nuest, Daniel; Bröring, Arne; Pebesma, Edzer
2013-04-01
In the past year, a group of open hardware enthusiasts and citizen scientists had large success in the crowd-funding of an open hardware-based sensor platform for air quality monitoring, called the Air Quality Egg. Via the kickstarter platform, the group was able to collect triple the amount of money than needed to fulfill their goals. Data generated by the Air Quality Egg is pushed to the data logging platform cosm.com, which makes the devices a part of the Internet of Things. The project aims at increasing the participation of citizens in the collection of data, the development of sensors, the operation of sensor stations, and, as data on cosm is publicly available, the sharing, visualization and analysis of data. Air Quality Eggs can measure NO2 and CO concentrations, as well as relative humidity and temperature. The chosen sensors are low-cost and have limited precision and accurracy. The Air Quality Egg consists of a stationary outdoor and a stationary indoor unit. Each outdoor unit will wirelessly transmit air quality measurements to the indoor unit, which forwards the data to cosm. Most recent versions of the Air Quality Egg allow a rough calibration of the gas sensors and on-the-fly conversion from raw sensor readings (impedance) to meaningful air quality data expressed in units of parts per billion. Data generated by these low-cost platforms are not intended to replace well-calibrated official monitoring stations, but rather augment the density of the total monitoring network with citizen sensors. To improve the usability of the Air Quality Egg, we present a new and more advanced concept, called the AirQuality SenseBox. We made the outdoor platform more autonomous and location-aware by adding solarpanels and rechargeable batteries as a power source. The AirQuality SenseBox knows its own position from a GPS device attached to the platform. As a mobile sensor platform, it can for instance be attached to vehicles. A low-cost and low-power wireless chipset
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Deep learning architecture for air quality predictions.
Li, Xiang; Peng, Ling; Hu, Yuan; Shao, Jing; Chi, Tianhe
2016-11-01
With the rapid development of urbanization and industrialization, many developing countries are suffering from heavy air pollution. Governments and citizens have expressed increasing concern regarding air pollution because it affects human health and sustainable development worldwide. Current air quality prediction methods mainly use shallow models; however, these methods produce unsatisfactory results, which inspired us to investigate methods of predicting air quality based on deep architecture models. In this paper, a novel spatiotemporal deep learning (STDL)-based air quality prediction method that inherently considers spatial and temporal correlations is proposed. A stacked autoencoder (SAE) model is used to extract inherent air quality features, and it is trained in a greedy layer-wise manner. Compared with traditional time series prediction models, our model can predict the air quality of all stations simultaneously and shows the temporal stability in all seasons. Moreover, a comparison with the spatiotemporal artificial neural network (STANN), auto regression moving average (ARMA), and support vector regression (SVR) models demonstrates that the proposed method of performing air quality predictions has a superior performance.
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New Federal Air Quality Standards.
ERIC Educational Resources Information Center
Stopinski, O. W.
The report discusses the current procedures for establishing air quality standards, the bases for standards, and, finally, proposed and final National Primary and Secondary Ambient Air Quality Standards for sulfur dioxide, particulate matter, carbon monoxide, nonmethane hydrocarbons, photochemical oxidants, and nitrogen dioxide. (Author/RH)
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NASA Astrophysics Data System (ADS)
Wang, Litao; Jang, Carey; Zhang, Yang; Wang, Kai; Zhang, Qiang; Streets, David; Fu, Joshua; Lei, Yu; Schreifels, Jeremy; He, Kebin; Hao, Jiming; Lam, Yun-Fat; Lin, Jerry; Meskhidze, Nicholas; Voorhees, Scott; Evarts, Dale; Phillips, Sharon
2010-09-01
Following the meteorological evaluation in Part I, this Part II paper presents the statistical evaluation of air quality predictions by the U.S. Environmental Protection Agency (U.S. EPA)'s Community Multi-Scale Air Quality (Models-3/CMAQ) model for the four simulated months in the base year 2005. The surface predictions were evaluated using the Air Pollution Index (API) data published by the China Ministry of Environmental Protection (MEP) for 31 capital cities and daily fine particulate matter (PM 2.5, particles with aerodiameter less than or equal to 2.5 μm) observations of an individual site in Tsinghua University (THU). To overcome the shortage in surface observations, satellite data are used to assess the column predictions including tropospheric nitrogen dioxide (NO 2) column abundance and aerosol optical depth (AOD). The result shows that CMAQ gives reasonably good predictions for the air quality. The air quality improvement that would result from the targeted sulfur dioxide (SO 2) and nitrogen oxides (NO x) emission controls in China were assessed for the objective year 2010. The results show that the emission controls can lead to significant air quality benefits. SO 2 concentrations in highly polluted areas of East China in 2010 are estimated to be decreased by 30-60% compared to the levels in the 2010 Business-As-Usual (BAU) case. The annual PM 2.5 can also decline by 3-15 μg m -3 (4-25%) due to the lower SO 2 and sulfate concentrations. If similar controls are implemented for NO x emissions, NO x concentrations are estimated to decrease by 30-60% as compared with the 2010 BAU scenario. The annual mean PM 2.5 concentrations will also decline by 2-14 μg m -3 (3-12%). In addition, the number of ozone (O 3) non-attainment areas in the northern China is projected to be much lower, with the maximum 1-h average O 3 concentrations in the summer reduced by 8-30 ppb.
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Innovations in projecting emissions for air quality modeling
Air quality modeling is used in setting air quality standards and in evaluating their costs and benefits. Historically, modeling applications have projected emissions and the resulting air quality only 5 to 10 years into the future. Recognition that the choice of air quality mana...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-06-27
... the Arizona State Implementation Plan, Arizona Department of Environmental Quality, Maricopa County Air Quality Department, and Pima County Department of Environmental Quality AGENCY: Environmental... Department of Environmental Quality (ADEQ), Maricopa County Air Quality Department (MCAQD), and Pima County...
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Indoor air quality: A psychosocial perspective
DOE Office of Scientific and Technical Information (OSTI.GOV)
Boxer, P.A.
1990-05-01
The incidence of indoor air quality problems has increased dramatically over the past decade. Investigation of these problems has yielded a definitive cause in only one third of the cases. Psychosocial factors may play a key role in the development and propagation of symptoms attributed to poor indoor air quality. Guidelines for managing indoor air quality problems from the organizational perspective are based upon psychosocial principles and elements of risk perception.
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Clean air through transportation : challenges in meeting national air quality standards
DOT National Transportation Integrated Search
1993-08-01
This report, required by Section 108(f)(3) of the Clean Air Act, as amended in 1990, addresses the issues of motor vehicles and air quality. The report discusses the challenges faced in attempting to improve air quality through transportation program...
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PM NAAQS Implementation Training and Assistance for State and Local Air Agencies
EPA offers training and assistance resources for air agencies in developing their state implementation plans (SIPs), as well as in reaching or maintaining attainment of the National Ambient Air Quality Standards (NAAQS) for particulate matter (PM).
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Indoor air quality investigation and health risk assessment at correctional institutions.
Ofungwu, Joseph
2005-04-01
A comprehensive indoor air-quality (IAQ) investigation was conducted at a state correctional facility in New Jersey, USA with a lengthy history of IAQ problems. The IAQ investigation comprised preliminary indoor air screening using direct readout instrumentation, indoor air/surface wipe sampling and laboratory analysis, as well as a heating, ventilation, and air-conditioning system evaluation, and a building envelope survey. In addition to air sampling, a human health risk assessment was performed to evaluate the potential for exposure to site-related air contaminants with respect to the inmate and worker populations. The risk assessment results for the prison facility indicated the potential for significant health risks for the inmate population, possibly reflecting the effects of their confinement and extended exposure to indoor air contaminants, as compared to the prison guard and worker population. Based on the results of the risk assessment, several mitigation measures are recommended to minimize prison population health risks and improve indoor air quality at prison facilities.
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Working Toward Policy-Relevant Air Quality Emissions Scenarios
NASA Astrophysics Data System (ADS)
Holloway, T.
2010-12-01
Though much work has been done to develop accurate chemical emission inventories, few publicly available inventories are appropriate for realistic policy analysis. Emissions from the electricity and transportation sectors, in particular, respond in complex ways to policy, technology, and energy use change. Many widely used inventories, such as the EPA National Emissions Inventory, are well-suited for modeling current air quality, but do not have the specificity needed to address "what if?" questions. Changes in electricity demand, fuel prices, new power sources, and emission controls all influence the emissions from regional power production, requiring a plant-by-plant assessment to capture the spatially explicit impacts. Similarly, land use, freight distribution, or driving behavior will yield differentiated transportation emissions for urban areas, suburbs, and rural highways. We here present results from three recent research projects at the University of Wisconsin—Madison, where bottom-up emission inventories for electricity, freight transport, and urban vehicle use were constructed to support policy-relevant air quality research. These three studies include: 1) Using the MyPower electricity dispatch model to calculate emissions and air quality impacts of Renewable Portfolio Standards and other carbon-management strategies; 2) Using advanced vehicle and commodity flow data from the Federal Highway Administration to evaluate the potential to shift commodities from truck to rail (assuming expanded infrastructure), and assess a range of alternative fuel suggestions; and 3) Working with urban planners to connect urban density with vehicle use to evaluate the air quality impacts of smart-growth in major Midwest cities. Drawing on the results of these three studies, and on challenges overcome in their execution, we discuss the current state of policy-relevant emission dataset generation, as well as techniques and attributes that need to be further refined in order
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Time to harmonize national ambient air quality standards.
Kutlar Joss, Meltem; Eeftens, Marloes; Gintowt, Emily; Kappeler, Ron; Künzli, Nino
2017-05-01
The World Health Organization has developed ambient air quality guidelines at levels considered to be safe or of acceptable risk for human health. These guidelines are meant to support governments in defining national standards. It is unclear how they are followed. We compiled an inventory of ambient air quality standards for 194 countries worldwide for six air pollutants: PM 2.5 , PM 10 , ozone, nitrogen dioxide, sulphur dioxide and carbon monoxide. We conducted literature and internet searches and asked country representatives about national ambient air quality standards. We found information on 170 countries including 57 countries that did not set any air quality standards. Levels varied greatly by country and by pollutant. Ambient air quality standards for PM 2.5 , PM 10 and SO 2 poorly complied with WHO guideline values. The agreement was higher for CO, SO 2 (10-min averaging time) and NO 2 . Regulatory differences mirror the differences in air quality and the related burden of disease around the globe. Governments worldwide should adopt science based air quality standards and clean air management plans to continuously improve air quality locally, nationally, and globally.
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40 CFR 52.2682 - Air quality surveillance.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 40 Protection of Environment 4 2010-07-01 2010-07-01 false Air quality surveillance. 52.2682... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Guam § 52.2682 Air quality... Pollution Control Standards and Regulations” (buffer zones—air quality sampling) are not in conformance with...
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40 CFR 52.2682 - Air quality surveillance.
Code of Federal Regulations, 2012 CFR
2012-07-01
... 40 Protection of Environment 5 2012-07-01 2012-07-01 false Air quality surveillance. 52.2682... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Guam § 52.2682 Air quality... Pollution Control Standards and Regulations” (buffer zones—air quality sampling) are not in conformance with...
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40 CFR 52.2682 - Air quality surveillance.
Code of Federal Regulations, 2013 CFR
2013-07-01
... 40 Protection of Environment 5 2013-07-01 2013-07-01 false Air quality surveillance. 52.2682... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Guam § 52.2682 Air quality... Pollution Control Standards and Regulations” (buffer zones—air quality sampling) are not in conformance with...
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40 CFR 52.2682 - Air quality surveillance.
Code of Federal Regulations, 2014 CFR
2014-07-01
... 40 Protection of Environment 5 2014-07-01 2014-07-01 false Air quality surveillance. 52.2682... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Guam § 52.2682 Air quality... Pollution Control Standards and Regulations” (buffer zones—air quality sampling) are not in conformance with...
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40 CFR 52.2682 - Air quality surveillance.
Code of Federal Regulations, 2011 CFR
2011-07-01
... 40 Protection of Environment 4 2011-07-01 2011-07-01 false Air quality surveillance. 52.2682... (CONTINUED) APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS (CONTINUED) Guam § 52.2682 Air quality... Pollution Control Standards and Regulations” (buffer zones—air quality sampling) are not in conformance with...
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School Indoor Air Quality Assessment and Program Implementation.
ERIC Educational Resources Information Center
Prill, R.; Blake, D.; Hales, D.
This paper describes the effectiveness of a three-step indoor air quality (IAQ) program implemented by 156 schools in the states of Washington and Idaho during the 2000-2001 school year. An experienced IAQ/building science specialist conducted walk-through assessments at each school. These assessments documented deficiencies and served as an…
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-10-04
... Promulgation of Air Quality Implementation Plans; Indiana; South Bend-Elkhart, Indiana Ozone Maintenance Plan..., Indiana 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) by replacing the... Vehicle Emissions Simulator (MOVES) 2010a emissions model. Indiana submitted this request to EPA for...
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Air Quality Criteria for Ozone and Related Photochemical ...
In February 2006, EPA released the final document, Air Quality Criteria for Ozone and Other Photochemical Oxidants. Tropospheric or surface-level ozone (O3) is one of six major air pollutants regulated by National Ambient Air Quality Standards (NAAQS) under the U.S. Clean Air Act. As mandated by the Clean Air Act, the U.S. Environmental Protection Agency (EPA) must periodically review the scientific bases (or criteria) for the various NAAQS by assessing newly available scientific information on a given criteria air pollutant. This document, Air Quality Criteria for Ozone and Other Photochemical Oxidants, is an updated revision of the 1996 Ozone Air Quality Criteria Document (O3 AQCD) that provided scientific bases for the current O3 NAAQS set in 1997. The Clean Air Act mandates periodic review of the National Ambient Air Quality Standards (NAAQS) for six common air pollutants, also referred to as criteria pollutants, including ozone.
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Air quality concerns of unconventional oil and natural gas production.
Field, R A; Soltis, J; Murphy, S
2014-05-01
Increased use of hydraulic fracturing ("fracking") in unconventional oil and natural gas (O & NG) development from coal, sandstone, and shale deposits in the United States (US) has created environmental concerns over water and air quality impacts. In this perspective we focus on how the production of unconventional O & NG affects air quality. We pay particular attention to shale gas as this type of development has transformed natural gas production in the US and is set to become important in the rest of the world. A variety of potential emission sources can be spread over tens of thousands of acres of a production area and this complicates assessment of local and regional air quality impacts. We outline upstream activities including drilling, completion and production. After contrasting the context for development activities in the US and Europe we explore the use of inventories for determining air emissions. Location and scale of analysis is important, as O & NG production emissions in some US basins account for nearly 100% of the pollution burden, whereas in other basins these activities make up less than 10% of total air emissions. While emission inventories are beneficial to quantifying air emissions from a particular source category, they do have limitations when determining air quality impacts from a large area. Air monitoring is essential, not only to validate inventories, but also to measure impacts. We describe the use of measurements, including ground-based mobile monitoring, network stations, airborne, and satellite platforms for measuring air quality impacts. We identify nitrogen oxides, volatile organic compounds (VOC), ozone, hazardous air pollutants (HAP), and methane as pollutants of concern related to O & NG activities. These pollutants can contribute to air quality concerns and they may be regulated in ambient air, due to human health or climate forcing concerns. Close to well pads, emissions are concentrated and exposure to a wide range of
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US EPA 2012 Air Quality Fused Surface for the Conterminous U.S. Map Service
This web service contains a polygon layer that depicts fused air quality predictions for 2012 for census tracts in the conterminous United States. Fused air quality predictions (for ozone and PM2.5) are modeled using a Bayesian space-time downscaling fusion model approach described in a series of three published journal papers: 1) (Berrocal, V., Gelfand, A. E. and Holland, D. M. (2012). Space-time fusion under error in computer model output: an application to modeling air quality. Biometrics 68, 837-848; 2) Berrocal, V., Gelfand, A. E. and Holland, D. M. (2010). A bivariate space-time downscaler under space and time misalignment. The Annals of Applied Statistics 4, 1942-1975; and 3) Berrocal, V., Gelfand, A. E., and Holland, D. M. (2010). A spatio-temporal downscaler for output from numerical models. J. of Agricultural, Biological,and Environmental Statistics 15, 176-197) is used to provide daily, predictive PM2.5 (daily average) and O3 (daily 8-hr maximum) surfaces for 2012. Summer (O3) and annual (PM2.5) means calculated and published. The downscaling fusion model uses both air quality monitoring data from the National Air Monitoring Stations/State and Local Air Monitoring Stations (NAMS/SLAMS) and numerical output from the Models-3/Community Multiscale Air Quality (CMAQ). Currently, predictions at the US census tract centroid locations within the 12 km CMAQ domain are archived. Predictions at the CMAQ grid cell centroids, or any desired set of locations co
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BASIS FOR PRIMARY AIR QUALITY CRITERIA AND STANDARDS
The Environmental Criteria and Assessment Office and the Office of Air Quality Planning and Standards are charged with responsibility for reviewing and assessing air quality criteria and air quality standards, respectively. Since adoption of the 1977 Clean Air Act Amendments, the...
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Urban Landscape Characterization Using Remote Sensing Data For Input into Air Quality Modeling
NASA Technical Reports Server (NTRS)
Quattrochi, Dale A.; Estes, Maurice G., Jr.; Crosson, William; Khan, Maudood
2005-01-01
The urban landscape is inherently complex and this complexity is not adequately captured in air quality models that are used to assess whether urban areas are in attainment of EPA air quality standards, particularly for ground level ozone. This inadequacy of air quality models to sufficiently respond to the heterogeneous nature of the urban landscape can impact how well these models predict ozone pollutant levels over metropolitan areas and ultimately, whether cities exceed EPA ozone air quality standards. We are exploring the utility of high-resolution remote sensing data and urban growth projections as improved inputs to meteorological and air quality models focusing on the Atlanta, Georgia metropolitan area as a case study. The National Land Cover Dataset at 30m resolution is being used as the land use/land cover input and aggregated to the 4km scale for the MM5 mesoscale meteorological model and the Community Multiscale Air Quality (CMAQ) modeling schemes. Use of these data have been found to better characterize low density/suburban development as compared with USGS 1 km land use/land cover data that have traditionally been used in modeling. Air quality prediction for future scenarios to 2030 is being facilitated by land use projections using a spatial growth model. Land use projections were developed using the 2030 Regional Transportation Plan developed by the Atlanta Regional Commission. This allows the State Environmental Protection agency to evaluate how these transportation plans will affect future air quality.
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75 FR 71033 - Air Quality Designations for the 2008 Lead (Pb) National Ambient Air Quality Standards
Federal Register 2010, 2011, 2012, 2013, 2014
2010-11-22
.... These include damage to the central nervous system, cardiovascular function, kidneys, immune system, and... growth); (5) Meteorology (weather/transport patterns); (6) Geography/topography (mountain ranges or other... Air Quality Designations for the 2008 Lead (Pb) National Ambient Air Quality Standards AGENCY...
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Air quality climate in the Columbia River Basin.
Sue A. Ferguson
1998-01-01
Aspects of climate that influence air quality in the Columbia River basin of the Northwestern United States are described. A few, relatively simple, analytical tools were developed to show the spatial and temporal patterns of mean-monthly mixing heights, precipitation scavenging, upper level and surface trajectory winds, and drought that inhibit pollution uptake. Also...
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NASA Astrophysics Data System (ADS)
Zhou, L.; Baker, K. R.; Napelenok, S. L.; Elleman, R. A.; Urbanski, S. P.
2016-12-01
Biomass burning, including wildfires and prescribed burns, strongly impact the global carbon cycle and are of increasing concern due to the potential impacts on ambient air quality. This modelling study focuses on the evolution of carbonaceous compounds during a prescribed burning experiment and assesses the impacts of burning on local to regional air quality. The Community Multiscale Air Quality (CMAQ) model is used to conduct 4 and 2 km grid resolution simulations of prescribed burning experiments in southeast Washington state and western Idaho state in summer 2013. The ground and airborne measurements from the field experiment are used to evaluate the model performance in capturing surface and aloft impacts from the burning events. Phase partitioning of organic compounds in the plume are studied as it is a crucial step towards understanding the fate of carbonaceous compounds. The sensitivities of ambient concentrations and deposition to emissions are conducted for organic carbon, elemental carbon and ozone to estimate the impacts of fire on air quality.
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Clean Air Markets - Where You Live (National and State Maps)
Where You Live accesses facility and unit attribute data as well as emissions data using a series of interactive national and state maps. This module allows the user to view data for regions of interest throughout the country using an intuitive interface, while also providing a national and statewide context for data specific to one or more facilities.EPA's Clean Air Markets Division (CAMD) includes several market-based regulatory programs designed to improve air quality and ecosystems. The most well-known of these programs are EPA's Acid Rain Program and the NOx Programs, which reduce emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx)-compounds that adversely affect air quality, the environment, and public health. CAMD also plays an integral role in the development and implementation of the Clean Air Interstate Rule (CAIR).
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-05-15
... Promulgation of Air Quality Implementation Plans; Ohio; Canton-Massillon 1997 8-Hour Ozone Maintenance Plan..., Ohio, 1997 8-hour ozone maintenance air quality State Implementation Plan (SIP) under the Clean Air Act... Motor Vehicle Emissions Simulator (MOVES) emissions model. Ohio submitted the SIP revision request to...
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Kaulfus, Aaron S; Nair, Udaysankar; Jaffe, Daniel; Christopher, Sundar A; Goodrick, Scott
2017-10-17
We utilize the NOAA Hazard Mapping System smoke product for the period of 2005 to 2016 to develop climatology of smoke occurrence over the Continental United States (CONUS) region and to study the impact of wildland fires on particulate matter air quality at the surface. Our results indicate that smoke is most frequently found over the Great Plains and western states during the summer months. Other hotspots of smoke occurrence are found over state and national parks in the southeast during winter and spring, in the Gulf of Mexico southwards of the Texas and Louisiana coastline during spring season and along the Mississippi River Delta during the fall season. A substantial portion (20%) of the 24 h federal standard for particulate pollution exceedance events in the CONUS region occur when smoke is present. If the U.S. Environmental Protection Agency regulations continue to reduce anthropogenic emissions, wildland fire emissions will become the major contributor to particulate pollution and exceedance events. In this context, we show that HMS smoke product is a valuable tool for analysis of exceptional events caused by wildland fires and our results indicate that these tools can be valuable for policy and decision makers.
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The new national ambient air quality standards in transportation planning
DOT National Transportation Integrated Search
2004-03-01
The purpose of this project is to identify the strategies adopted by several states around the country for preparing to adjust their transportation planning practices to the regulatory requirements associated with designation as an air quality nonatt...
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Forest ecosystem services: Carbon and air quality
David J. Nowak; Neelam C. Poudyal; Steve G. McNulty
2017-01-01
Forests provide various ecosystem services related to air quality that can provide substantial value to society. Through tree growth and alteration of their local environment, trees and forests both directly and indirectly affect air quality. Though forests affect air quality in numerous ways, this chapter will focus on five main ecosystem services or disservices...
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Instrumentation for air quality measurements.
NASA Technical Reports Server (NTRS)
Loewenstein, M.
1973-01-01
Comparison of the new generation of air quality monitoring instruments with some more traditional methods. The first generation of air quality measurement instruments, based on the use of oxidant coulometric cells, nitrogen oxide colorimetry, carbon monoxide infrared analyzers, and other types of detectors, is compared with new techniques now coming into wide use in the air monitoring field and involving the use of chemiluminescent reactions, optical absorption detectors, a refinement of the carbon monoxide infrared analyzer, electrochemical cells based on solid electrolytes, and laser detectors.
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40 CFR 52.1234 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.1234 Section 52.1234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1884 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.1884 Section 52.1884 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.499 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.499 Section 52.499 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1180 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.1180 Section 52.1180 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2827 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2827 Section 52.2827 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1689 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.1689 Section 52.1689 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2676 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2676 Section 52.2676 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2779 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2779 Section 52.2779 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2729 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2729 Section 52.2729 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2497 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2497 Section 52.2497 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1603 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.1603 Section 52.1603 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1165 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.1165 Section 52.1165 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulation for preventing significant deterioration of air quality. The...
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40 CFR 52.499 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.499 Section 52.499 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1884 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.1884 Section 52.1884 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1165 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.1165 Section 52.1165 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulation for preventing significant deterioration of air quality. The...
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40 CFR 52.1165 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.1165 Section 52.1165 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulation for preventing significant deterioration of air quality. The...
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40 CFR 52.1180 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.1180 Section 52.1180 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2729 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2729 Section 52.2729 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1884 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.1884 Section 52.1884 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2779 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2779 Section 52.2779 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.499 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.499 Section 52.499 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1603 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.1603 Section 52.1603 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1234 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.1234 Section 52.1234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2497 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.2497 Section 52.2497 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2497 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2497 Section 52.2497 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1603 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.1603 Section 52.1603 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1884 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.1884 Section 52.1884 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2676 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2676 Section 52.2676 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1603 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.1603 Section 52.1603 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.499 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.499 Section 52.499 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2676 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2676 Section 52.2676 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2779 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2779 Section 52.2779 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1234 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.1234 Section 52.1234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2676 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.2676 Section 52.2676 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1165 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.1165 Section 52.1165 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulation for preventing significant deterioration of air quality. The...
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40 CFR 52.2827 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2827 Section 52.2827 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.1165 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.1165 Section 52.1165 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulation for preventing significant deterioration of air quality. The...
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40 CFR 52.1180 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.1180 Section 52.1180 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2676 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2676 Section 52.2676 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2497 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2497 Section 52.2497 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.499 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.499 Section 52.499 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2729 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2729 Section 52.2729 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.1180 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.1180 Section 52.1180 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2497 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2497 Section 52.2497 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.1234 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.1234 Section 52.1234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2827 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2827 Section 52.2827 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.1180 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.1180 Section 52.1180 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.1884 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.1884 Section 52.1884 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2729 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.2729 Section 52.2729 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2729 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2729 Section 52.2729 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2827 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2827 Section 52.2827 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2827 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.2827 Section 52.2827 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.1234 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.1234 Section 52.1234 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2779 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2779 Section 52.2779 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.2779 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.2779 Section 52.2779 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
-
40 CFR 52.1603 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.1603 Section 52.1603 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... deterioration of air quality. (b) Regulations for preventing significant deterioration of air quality. The...
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Sarah Jovan; Bruce McCune
2005-01-01
Air-quality monitoring in the United States is typically focused on urban areas even though the detrimental effects of pollution often extend into surrounding ecosystems. The purpose of this study was to construct a model, based upon epiphytic macrolichen community data, to indicate air-quality and climate in forested areas throughout the greater Central Valley of...
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Increasing the Use of Earth Science Data and Models in Air Quality Management.
Milford, Jana B; Knight, Daniel
2017-04-01
In 2010, the U.S. National Aeronautics and Space Administration (NASA) initiated the Air Quality Applied Science Team (AQAST) as a 5-year, $17.5-million award with 19 principal investigators. AQAST aims to increase the use of Earth science products in air quality-related research and to help meet air quality managers' information needs. We conducted a Web-based survey and a limited number of follow-up interviews to investigate federal, state, tribal, and local air quality managers' perspectives on usefulness of Earth science data and models, and on the impact AQAST has had. The air quality managers we surveyed identified meeting the National Ambient Air Quality Standards for ozone and particulate matter, emissions from mobile sources, and interstate air pollution transport as top challenges in need of improved information. Most survey respondents viewed inadequate coverage or frequency of satellite observations, data uncertainty, and lack of staff time or resources as barriers to increased use of satellite data by their organizations. Managers who have been involved with AQAST indicated that the program has helped build awareness of NASA Earth science products, and assisted their organizations with retrieval and interpretation of satellite data and with application of global chemistry and climate models. AQAST has also helped build a network between researchers and air quality managers with potential for further collaborations. NASA's Air Quality Applied Science Team (AQAST) aims to increase the use of satellite data and global chemistry and climate models for air quality management purposes, by supporting research and tool development projects of interest to both groups. Our survey and interviews of air quality managers indicate they found value in many AQAST projects and particularly appreciated the connections to the research community that the program facilitated. Managers expressed interest in receiving continued support for their organizations' use of
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Strength of smoke-free air laws and indoor air quality.
Lee, Kiyoung; Hahn, Ellen J; Robertson, Heather E; Lee, Seongjik; Vogel, Suzann L; Travers, Mark J
2009-04-01
Smoke-free air laws have been implemented in many Kentucky communities to protect the public from the harmful effects of secondhand smoke exposure. The impact of different strengths of smoke-free air laws on indoor air quality was assessed. Indoor air quality in hospitality venues was assessed in seven communities before and after comprehensive smoke-free air laws and in two communities only after partial smoke-free air laws. One community was measured three times: before any smoke-free air law, after the initial partial law, and after the law was strengthened to cover all workplaces and public places with few exemptions. Real-time measurements of particulate matters with 2.5 mum aerodynamic diameter or smaller (PM(2.5)) were obtained. When comprehensive smoke-free air laws were implemented, indoor PM(2.5) concentrations decreased significantly from 161 to 20 microg/m3. In one community that implemented a comprehensive smoke-free law after initially passing a partial law, indoor PM(2.5) concentrations were 304 microg/m3 before the law, 338 microg/m3 after the partial law, and 9 microg/m3 after the comprehensive law. The study clearly demonstrated that partial smoke-free air laws do not improve indoor air quality. A significant linear trend indicated that PM(2.5) levels in the establishments decreased with fewer numbers of burning cigarettes. Only comprehensive smoke-free air laws are effective in reducing indoor air pollution from secondhand tobacco smoke.
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-01-31
... the California State Implementation Plan, Santa Barbara Air Pollution Control District, Antelope Valley Air Quality Management District, Ventura County Air Pollution Control District and Placer County Air Pollution Control District AGENCY: Environmental Protection Agency (EPA). ACTION: Direct final...
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Federal Register 2010, 2011, 2012, 2013, 2014
2011-01-31
... the California State Implementation Plan, Santa Barbara Air Pollution Control District, Placer County Air Pollution Control District, Antelope Valley Air Quality Management District, and Ventura County Air Pollution Control District AGENCY: Environmental Protection Agency (EPA). ACTION: Proposed rule...
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Air quality and passenger comfort in an air-conditioned bus micro-environment.
Zhu, Xiaoxuan; Lei, Li; Wang, Xingshen; Zhang, Yinghui
2018-04-12
In this study, passenger comfort and the air pollution status of the micro-environmental conditions in an air-conditioned bus were investigated through questionnaires, field measurements, and a numerical simulation. As a subjective analysis, passengers' perceptions of indoor environmental quality and comfort levels were determined from questionnaires. As an objective analysis, a numerical simulation was conducted using a discrete phase model to determine the diffusion and distribution of pollutants, including particulate matter with a diameter < 10 μm (PM 10 ), which were verified by experimental results. The results revealed poor air quality and dissatisfactory thermal comfort conditions in Jinan's air-conditioned bus system. To solve these problems, three scenarios (schemes A, B, C) were designed to alter the ventilation parameters. According to the results of an improved simulation of these scenarios, reducing or adding air outputs would shorten the time taken to reach steady-state conditions and weaken the airflow or lower the temperature in the cabin. The airflow pathway was closely related to the layout of the air conditioning. Scheme B lowered the temperature by 0.4 K and reduced the airflow by 0.01 m/s, while scheme C reduced the volume concentration of PM 10 to 150 μg/m 3 . Changing the air supply angle could further improve the airflow and reduce the concentration of PM 10 . With regard to the perception of airflow and thermal comfort, the scheme with an airflow provided by a 60° nozzle was considered better, and the concentration of PM 10 was reduced to 130 μg/m 3 .
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Assessment of the emissions and air quality impacts of biomass and biogas use in California.
Carreras-Sospedra, Marc; Williams, Robert; Dabdub, Donald
2016-02-01
It is estimated that there is sufficient in-state "technically" recoverable biomass to support nearly 4000 MW of bioelectricity generation capacity. This study assesses the emissions of greenhouse gases and air pollutants and resulting air quality impacts of new and existing bioenergy capacity throughout the state of California, focusing on feedstocks and advanced technologies utilizing biomass resources predominant in each region. The options for bioresources include the production of bioelectricity and renewable natural gas (NG). Emissions of criteria pollutants and greenhouse gases are quantified for a set of scenarios that span the emission factors for power generation and the use of renewable natural gas for vehicle fueling. Emissions are input to the Community Multiscale Air Quality (CMAQ) model to predict regional and statewide temporal air quality impacts from the biopower scenarios. With current technology and at the emission levels of current installations, maximum bioelectricity production could increase nitrogen oxide (NOx) emissions by 10% in 2020, which would cause increases in ozone and particulate matter concentrations in large areas of California. Technology upgrades would achieve the lowest criteria pollutant emissions. Conversion of biomass to compressed NG (CNG) for vehicles would achieve comparable emission reductions of criteria pollutants and minimize emissions of greenhouse gases (GHG). Air quality modeling of biomass scenarios suggest that applying technological changes and emission controls would minimize the air quality impacts of bioelectricity generation. And a shift from bioelectricity production to CNG production for vehicles would reduce air quality impacts further. From a co-benefits standpoint, CNG production for vehicles appears to provide the best benefits in terms of GHG emissions and air quality. This investigation provides a consistent analysis of air quality impacts and greenhouse gas emissions for scenarios examining
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The Value of Clean Air: Comparing Discounting of Delayed Air Quality and Money Across Magnitudes.
Berry, Meredith S; Friedel, Jonathan E; DeHart, William B; Mahamane, Salif; Jordan, Kerry E; Odum, Amy L
2017-06-01
The detrimental health effects of exposure to air pollution are well established. Fostering behavioral change concerning air quality may be challenging because the detrimental health effects of exposure to air pollution are delayed. Delay discounting, a measure of impulsive choice, encapsulates this process of choosing between the immediate conveniences of behaviors that increase pollution and the delayed consequences of prolonged exposure to poor air quality. In Experiment 1, participants completed a series of delay-discounting tasks for air quality and money. We found that participants discounted delayed air quality more than money. In Experiment 2, we investigated whether the common finding that large amounts of money are discounted less steeply than small amounts of money generalized to larger and smaller improvements in air quality. Participants discounted larger improvements in air quality less steeply than smaller improvements, indicating that the discounting of air quality shares a similar process as the discounting of money. Our results indicate that the discounting of delayed money is strongly related to the discounting of delayed air quality and that similar mechanisms may be involved in the discounting of these qualitatively different outcomes. These data are also the first to demonstrate the malleability of delay discounting of air quality, and provide important public health implications for decreasing delay discounting of air quality.
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40 CFR 52.632 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.632 Section 52.632 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
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40 CFR 52.793 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.793 Section 52.793 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
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40 CFR 52.738 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.738 Section 52.738 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
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40 CFR 52.738 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.738 Section 52.738 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.632 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.632 Section 52.632 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
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40 CFR 52.793 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.793 Section 52.793 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.632 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.632 Section 52.632 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.632 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.632 Section 52.632 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.738 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.738 Section 52.738 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.632 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.632 Section 52.632 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.738 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.738 Section 52.738 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.738 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.738 Section 52.738 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.793 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.793 Section 52.793 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.793 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.793 Section 52.793 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
-
40 CFR 52.793 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.793 Section 52.793 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulations for preventing significant deterioration of air quality. The provisions...
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Air pollution removal by urban trees and shrubs in the United States
David J. Nowak; Daniel E. Crane; Jack C. Stevens
2006-01-01
A modeling study using hourly meteorological and pollution concentration data from across the coterminous United States demonstrates that urban trees remove large amounts of air pollution that consequently improve urban air quality. Pollution removal (03, PM10, NO2, SO2, CO)...
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North Coast Unified Air Quality Management District: PSD Delegation Agreements
Agreements for Partial Delegation of the Federal Prevention of Significant Deterioration (PSD) Program Set Forth in 40 CPR 52.21 by the United States Environmental Protection Agency, Region 9 to the North Coast Unified Air Quality Management District.
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Measuring the value of air quality: application of the spatial hedonic model.
Kim, Seung Gyu; Cho, Seong-Hoon; Lambert, Dayton M; Roberts, Roland K
2010-03-01
This study applies a hedonic model to assess the economic benefits of air quality improvement following the 1990 Clean Air Act Amendment at the county level in the lower 48 United States. An instrumental variable approach that combines geographically weighted regression and spatial autoregression methods (GWR-SEM) is adopted to simultaneously account for spatial heterogeneity and spatial autocorrelation. SEM mitigates spatial dependency while GWR addresses spatial heterogeneity by allowing response coefficients to vary across observations. Positive amenity values of improved air quality are found in four major clusters: (1) in East Kentucky and most of Georgia around the Southern Appalachian area; (2) in a few counties in Illinois; (3) on the border of Oklahoma and Kansas, on the border of Kansas and Nebraska, and in east Texas; and (4) in a few counties in Montana. Clusters of significant positive amenity values may exist because of a combination of intense air pollution and consumer awareness of diminishing air quality.
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Operational prediction of air quality for the United States: applications of satellite observations
NASA Astrophysics Data System (ADS)
Stajner, Ivanka; Lee, Pius; Tong, Daniel; Pan, Li; McQueen, Jeff; Huang, Jianping; Huang, Ho-Chun; Draxler, Roland; Kondragunta, Shobha; Upadhayay, Sikchya
2015-04-01
Operational predictions of ozone and wildfire smoke over United States (U.S.) and predictions of airborne dust over the contiguous 48 states are provided by NOAA at http://airquality.weather.gov/. North American Mesoscale (NAM) weather predictions with inventory based emissions estimates from the U.S. Environmental Protection Agency (EPA) and chemical processes within the Community Multiscale Air Quality (CMAQ) model are combined together to produce ozone predictions. Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model is used to predict wildfire smoke and dust storm predictions. Routine verification of ozone predictions relies on AIRNow compilation of observations from surface monitors. Retrievals of smoke column integrals from GOES satellites and dust column integrals from MODIS satellite instruments are used for verification of smoke and dust predictions. Recent updates of NOAA's operational air quality predictions have focused on mobile emissions using the projections of mobile sources for 2012. Since emission inventories are complex and take years to assemble and evaluate causing a lag of information, we recently began combing inventory information with projections of mobile sources. In order to evaluate this emission update, these changes in projected NOx emissions from 2005-2012 were compared with observed changes in Ozone Monitoring Instrument (OMI) NO2 observations and NOx measured by surface monitors over large U.S. cities over the same period. Comparisons indicate that projected decreases in NOx emissions from 2005 to 2012 are similar, but not as strong as the decreases in the observed NOx concentrations and in OMI NO2 retrievals. Nevertheless, the use of projected mobile NOx emissions in the predictions reduced biases in predicted NOx concentrations, with the largest improvement in the urban areas. Ozone biases are reduced as well, with the largest improvement seen in rural areas. Recent testing of PM2.5 predictions is relying on
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SO2 NAAQS Implementation Training and Assistance for State and Local Air Agencies
Presentations and training help air agencies understand the National Ambient Air Quality Standards (NAAQS) for sulfur dioxide, how to engage the public in local emissions reduction programs, successful state implementation plan (SIP) development, and more.
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40 CFR 52.432 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.432 Section 52.432 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulation for preventing significant deterioration of air quality. The provisions of...
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40 CFR 52.432 - Significant deterioration of air quality.
Code of Federal Regulations, 2011 CFR
2011-07-01
... quality. 52.432 Section 52.432 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulation for preventing significant deterioration of air quality. The provisions of...
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40 CFR 52.432 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.432 Section 52.432 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air Act are not met... air quality. (b) Regulation for preventing significant deterioration of air quality. The provisions of...
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SPATIAL PREDICTION OF AIR QUALITY DATA
Site-specific air quality monitoring data have been used extensively in both scientific and regulatory programs. As such, these data provide essential information to the public, environmental managers, and the atmospheric research community. Currently, air quality management prac...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-09-09
... Promulgation of Air Quality Implementation Plans; Minnesota; Carbon Monoxide (CO) Limited Maintenance Plan for... June 16, 2010, to revise the Minnesota State Implementation Plan (SIP) for carbon monoxide (CO) under the Clean Air Act (CAA). The State has submitted a limited maintenance plan for CO showing continued...
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Federal Register 2010, 2011, 2012, 2013, 2014
2012-09-10
... for the 2008 Lead National Ambient Air Quality Standards AGENCY: Environmental Protection Agency (EPA... national ambient air quality standards (NAAQS). DATES: This final rule is effective on October 10, 2012... promulgation of such NAAQS. Section 110(a)(2) of the CAA directs all states to develop and maintain an air...
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High-Density, High-Resolution, Low-Cost Air Quality Sensor Networks for Urban Air Monitoring
NASA Astrophysics Data System (ADS)
Mead, M. I.; Popoola, O. A.; Stewart, G.; Bright, V.; Kaye, P.; Saffell, J.
2012-12-01
Monitoring air quality in highly granular environments such as urban areas which are spatially heterogeneous with variable emission sources, measurements need to be made at appropriate spatial and temporal scales. Current routine air quality monitoring networks generally are either composed of sparse expensive installations (incorporating e.g. chemiluminescence instruments) or higher density low time resolution systems (e.g. NO2 diffusion tubes). Either approach may not accurately capture important effects such as pollutant "hot spots" or adequately capture spatial (or temporal) variability. As a result, analysis based on data from traditional low spatial resolution networks, such as personal exposure, may be inaccurate. In this paper we present details of a sophisticated, low-cost, multi species (gas phase, speciated PM, meteorology) air quality measurement network methodology incorporating GPS and GPRS which has been developed for high resolution air quality measurements in urban areas. Sensor networks developed in the Centre for Atmospheric Science (University of Cambridge) incorporated electrochemical gas sensors configured for use in urban air quality studies operating at parts-per-billion (ppb) levels. It has been demonstrated that these sensors can be used to measure key air quality gases such as CO, NO and NO2 at the low ppb mixing ratios present in the urban environment (estimated detection limits <4ppb for CO and NO and <1ppb for NO2. Mead et al (submitted Aug., 2012)). Based on this work, a state of the art multi species instrument package for deployment in scalable sensor networks has been developed which has general applicability. This is currently being employed as part of a major 3 year UK program at London Heathrow airport (the Sensor Networks for Air Quality (SNAQ) Heathrow project). The main project outcome is the creation of a calibrated, high spatial and temporal resolution data set for O3, NO, NO2, SO2, CO, CO2, VOCstotal, size-speciated PM
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Stratospheric Intrusion-Influenced Ozone Air Quality Exceedences Investigated in MERRA-2
NASA Technical Reports Server (NTRS)
Knowland, K. Emma; Ott, Lesley; Duncan, Bryan; Wargan, Krzysztof
2017-01-01
Ozone near the surface is harmful to human health and is a result of the photochemical reaction with both man-made and natural precursor pollutant sources. Therefore, in order to reduce near surface ozone concentrations, communities must reduce anthropogenic pollution sources. However, the injection of stratospheric ozone into the troposphere, known as a stratospheric intrusion, can also lead to concentrations of ground-level ozone exceeding air quality standards. Stratospheric intrusions are dynamical atmospheric features, however, these intrusions have been misrepresented in models and reanalyses until recently, as the features of a stratospheric intrusion are best identified in horizontal resolutions of approximately 50 km or smaller. NASA's Modern-Era Retrospective Analysis for Research and Applications Version-2 (MERRA-2) reanalysis is a publicly-available high-resolution dataset (50 km) with assimilated ozone that characterizes stratospheric ozone on the same spatiotemporal resolution as the meteorology. We show that stratospheric intrusions that impact surface air quality are well represented in the MERRA-2 reanalysis. This is demonstrated through a case study analysis of stratospheric intrusion events which were identified by the United States Environmental Protection Agency (EPA) to impact surface ozone air quality in spring 2012 in Colorado. The stratospheric intrusions are identified in MERRA-2 by the folding of the dynamical tropopause under the jet stream and subsequent isentropic descent of dry, O3-rich stratospheric air towards the surface where ozone air quality exceedences were observed. The MERRA-2 reanalysis can support air quality agencies for more rapid identification of the impact of stratospheric air on ground-level ozone.
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78 FR 73445 - Disapproval, Approval and Promulgation of Air Quality Implementation Plan Revisions...
Federal Register 2010, 2011, 2012, 2013, 2014
2013-12-06
...] Disapproval, Approval and Promulgation of Air Quality Implementation Plan Revisions; Infrastructure... State of Wyoming to demonstrate that the SIP meets the infrastructure requirements of the Clean Air Act... revised NAAQS is promulgated, review their SIPs to ensure that they meet infrastructure requirements. The...
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The Value of Clean Air: Comparing Discounting of Delayed Air Quality and Money Across Magnitudes
Friedel, Jonathan E.; DeHart, William B.; Mahamane, Salif; Jordan, Kerry E.; Odum, Amy L.
2018-01-01
The detrimental health effects of exposure to air pollution are well established. Fostering behavioral change concerning air quality may be challenging because the detrimental health effects of exposure to air pollution are delayed. Delay discounting, a measure of impulsive choice, encapsulates this process of choosing between the immediate conveniences of behaviors that increase pollution and the delayed consequences of prolonged exposure to poor air quality. In Experiment 1, participants completed a series of delay-discounting tasks for air quality and money. We found that participants discounted delayed air quality more than money. In Experiment 2, we investigated whether the common finding that large amounts of money are discounted less steeply than small amounts of money generalized to larger and smaller improvements in air quality. Participants discounted larger improvements in air quality less steeply than smaller improvements, indicating that the discounting of air quality shares a similar process as the discounting of money. Our results indicate that the discounting of delayed money is strongly related to the discounting of delayed air quality and that similar mechanisms may be involved in the discounting of these qualitatively different outcomes. These data are also the first to demonstrate the malleability of delay discounting of air quality, and provide important public health implications for decreasing delay discounting of air quality. PMID:29606776
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Likelihood of achieving air quality targets under model uncertainties.
Digar, Antara; Cohan, Daniel S; Cox, Dennis D; Kim, Byeong-Uk; Boylan, James W
2011-01-01
Regulatory attainment demonstrations in the United States typically apply a bright-line test to predict whether a control strategy is sufficient to attain an air quality standard. Photochemical models are the best tools available to project future pollutant levels and are a critical part of regulatory attainment demonstrations. However, because photochemical models are uncertain and future meteorology is unknowable, future pollutant levels cannot be predicted perfectly and attainment cannot be guaranteed. This paper introduces a computationally efficient methodology for estimating the likelihood that an emission control strategy will achieve an air quality objective in light of uncertainties in photochemical model input parameters (e.g., uncertain emission and reaction rates, deposition velocities, and boundary conditions). The method incorporates Monte Carlo simulations of a reduced form model representing pollutant-precursor response under parametric uncertainty to probabilistically predict the improvement in air quality due to emission control. The method is applied to recent 8-h ozone attainment modeling for Atlanta, Georgia, to assess the likelihood that additional controls would achieve fixed (well-defined) or flexible (due to meteorological variability and uncertain emission trends) targets of air pollution reduction. The results show that in certain instances ranking of the predicted effectiveness of control strategies may differ between probabilistic and deterministic analyses.
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U.S.-Canada cooperation: the U.S.-Canada air quality agreement.
McLean, Brian; Barton, Jane
2008-01-01
The impetus for the Canada-U.S. Air Quality Agreement was transboundary acid rain in eastern North America. This problem drove the parties to develop a bilateral agreement that not only addressed this issue, but also set up a broad and flexible framework to address other air quality problems. In 2000, the Ozone Annex to reduce smog and its precursor pollutants was negotiated. A transboundary particulate matter (PM) science assessment in 2004 led to the commencement of negotiation of a PM annex in late 2007. Over the course of 15 yr, Canada and the United States also developed innovative cooperative arrangements. Two transboundary airshed dialogues became important sources of practical on-the-ground cooperation in the Georgia Basin-Puget Sound and the Great Lakes Basin. In addition to providing the basis for ongoing international dialogue, these transboundary airshed projects resulted in changes to administrative practices as the parties exchange information and learn from each other in ways that benefit the airshed community. The nature of the Air Quality Agreement also enabled both Canada and the United States to address concerns each has had about specific pollutant sources and to address them in ways that avoided confrontation and resulted in air quality improvements for people living in the airsheds. Case studies of three of the "informal consultations" that have occurred under the agreement are described: where discussions occurred around a power plant in Michigan, a power plant in Saskatchewan, and a steel mill in Ontario. More than an agreement, this relationship has built a capacity to deal with common problems. Fostering such a relationship with its implicit transfer of knowledge and experience has opened doors for discussions on a new Clean Air framework in Canada and joint analyses of cross-border sulfur dioxide (SO2) and nitrogen oxides (NOx) emissions caps and trading. U.S. experience with cap and trading is highlighted for background and context. The
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Strength of smoke-free air laws and indoor air quality
Hahn, Ellen J.; Robertson, Heather E.; Vogel, Suzann L.; Travers, Mark J.
2009-01-01
Introduction: Smoke-free air laws have been implemented in many Kentucky communities to protect the public from the harmful effects of secondhand smoke exposure. The impact of different strengths of smoke-free air laws on indoor air quality was assessed. Methods: Indoor air quality in hospitality venues was assessed in seven communities before and after comprehensive smoke-free air laws and in two communities only after partial smoke-free air laws. One community was measured three times: before any smoke-free air law, after the initial partial law, and after the law was strengthened to cover all workplaces and public places with few exemptions. Real-time measurements of particulate matters with 2.5 μm aerodynamic diameter or smaller (PM2.5) were obtained. Results: When comprehensive smoke-free air laws were implemented, indoor PM2.5 concentrations decreased significantly from 161 to 20 μg/m3. In one community that implemented a comprehensive smoke-free law after initially passing a partial law, indoor PM2.5 concentrations were 304 μg/m3 before the law, 338 μg/m3 after the partial law, and 9 μg/m3 after the comprehensive law. Discussion: The study clearly demonstrated that partial smoke-free air laws do not improve indoor air quality. A significant linear trend indicated that PM2.5 levels in the establishments decreased with fewer numbers of burning cigarettes. Only comprehensive smoke-free air laws are effective in reducing indoor air pollution from secondhand tobacco smoke. PMID:19346510
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Air Quality Monitoring: Risk-Based Choices
NASA Technical Reports Server (NTRS)
James, John T.
2009-01-01
Air monitoring is secondary to rigid control of risks to air quality. Air quality monitoring requires us to target the credible residual risks. Constraints on monitoring devices are severe. Must transition from archival to real-time, on-board monitoring. Must provide data to crew in a way that they can interpret findings. Dust management and monitoring may be a major concern for exploration class missions.
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Cleaner Air through Cooperation: Progress under the Air Quality Agreement- 2003
Read a brochure that provides an overview of the air quality agreement between the U.S. and Canada, followed by key commitments and progress, including air quality programs and scientific cooperation between the two nations.
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Federal Register 2010, 2011, 2012, 2013, 2014
2013-10-25
...] Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revised Ambient Air Quality... of Virginia adding ambient air quality standards and associated reference conditions for Fine Particulate Matter (PM 2.5 ) that are consistent with the 2013 National Ambient Air Quality Standards (NAAQS...
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Federal Register 2010, 2011, 2012, 2013, 2014
2010-03-29
.... What Is a SIP? Section 110 of the CAA requires states to develop air pollution regulations and control... air pollution regulations, control strategies, other means or techniques, and technical analyses... provisions of the CAA. A SIP protects air quality primarily by addressing air pollution at its point of...
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Classification of air quality using fuzzy synthetic multiplication.
Abdullah, Lazim; Khalid, Noor Dalina
2012-11-01
Proper identification of environment's air quality based on limited observations is an essential task to meet the goals of environmental management. Various classification methods have been used to estimate the change of air quality status and health. However, discrepancies frequently arise from the lack of clear distinction between each air quality, the uncertainty in the quality criteria employed and the vagueness or fuzziness embedded in the decision-making output values. Owing to inherent imprecision, difficulties always exist in some conventional methodologies when describing integrated air quality conditions with respect to various pollutants. Therefore, this paper presents two fuzzy multiplication synthetic techniques to establish classification of air quality. The fuzzy multiplication technique empowers the max-min operations in "or" and "and" in executing the fuzzy arithmetic operations. Based on a set of air pollutants data carbon monoxide, sulfur dioxide, nitrogen dioxide, ozone, and particulate matter (PM(10)) collected from a network of 51 stations in Klang Valley, East Malaysia, Sabah, and Sarawak were utilized in this evaluation. The two fuzzy multiplication techniques consistently classified Malaysia's air quality as "good." The findings indicated that the techniques may have successfully harmonized inherent discrepancies and interpret complex conditions. It was demonstrated that fuzzy synthetic multiplication techniques are quite appropriate techniques for air quality management.
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40 CFR 52.931 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.931 Section 52.931 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... deterioration of air quality. (a) Regulations for preventing significant deterioration of air quality. The..., the Kentucky Division for Air Quality has determined that the application complies with the applicable...
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40 CFR 52.2451 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2451 Section 52.2451 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... Quality Deterioration. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2528 - Significant deterioration of air quality.
Code of Federal Regulations, 2010 CFR
2010-07-01
... quality. 52.2528 Section 52.2528 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of Sections 160 through 165 of the Clean Air... Quality Deterioration. (b) Regulations for Preventing Significant Deterioration of Air Quality, the...
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40 CFR 52.2528 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2528 Section 52.2528 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of Sections 160 through 165 of the Clean Air... Quality Deterioration. (b) Regulations for Preventing Significant Deterioration of Air Quality, the...
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40 CFR 52.2451 - Significant deterioration of air quality.
Code of Federal Regulations, 2014 CFR
2014-07-01
... quality. 52.2451 Section 52.2451 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... Quality Deterioration. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2451 - Significant deterioration of air quality.
Code of Federal Regulations, 2013 CFR
2013-07-01
... quality. 52.2451 Section 52.2451 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... Quality Deterioration. (b) Regulations for preventing significant deterioration of air quality. The...
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40 CFR 52.2451 - Significant deterioration of air quality.
Code of Federal Regulations, 2012 CFR
2012-07-01
... quality. 52.2451 Section 52.2451 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR... Significant deterioration of air quality. (a) The requirements of sections 160 through 165 of the Clean Air... Quality Deterioration. (b) Regulations for preventing significant deterioration of air quality. The...