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Air - General
National Summary
The federal Clean Air Act (CAA) was enacted in 1970 because of increasing concerns over the quality of the nation's air. The CAA was amended in 1977 and 1990. Simply put, the purpose of the CAA is to protect and improve the nation's air quality, the stratospheric ozone layer, and the public's health. Through the CAA's various mandates, the United States has seen the quality of its air greatly improve over the past few decades.
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 981 items in 25 pages
Proposed Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Delaware; Attainment Plan for the Philadelphia-Wilmington Nonattainment Area for the 1997 Annual PM-2.5 Standard 09/19/2013National
Notices Integrated Science Assessment for Oxides of Sulfur 05/10/2013National
Proposed Regulations 20 CFR 52 - Air Quality Implementation Plans, Virginia 05/21/2014National
Notices 2012 Fall Joint Meeting of the Ozone Transport Commission and the Mid-Atlantic Northeast Visibility Union 10/26/2012National
Notices 2013 Annual Meeting of the Ozone Transport Commission 04/30/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Removal of Consumer and Commercial Products Rules 07/03/2013National
Proposed Regulations 40 CFR 190 - Environmental Radiation Protection Standards for Nuclear Power Operations 02/04/2014National
Proposed Regulations 40 CFR 35 - Clean Air Act Grant: Santa Barbara County Air Pollution Control District 07/03/2014National
Proposed Regulations 40 CFR 35 - Clean Air Act Grant: South Coast Air Quality Management District; Opportunity for Public Hearing 03/18/2013National
Proposed Regulations 40 CFR 35 - Clean Air Act Grant: South Coast Air Quality Management District; Opportunity for Public Hearing 03/18/2014National
Final Regulations 40 CFR 49 - Air Quality Implementation Plans; Navajo Nation 08/08/2014National
Proposed Regulations 40 CFR 49 - Proposed BART Determination, Navajo Nation 09/25/2013National
Final Regulations 40 CFR 49 - Source Specific FIP for Implementing BART for Four Corners Power Plant: Navajo Nation 08/24/2012National
Final Regulations 40 CFR 49 - Air Implementation Plan, Navajo Nation Indian Reservation 10/02/2013National
Final Regulations 40 CFR 49 - Air Quality Implementation Plans, North Dakota 03/22/2013National
Proposed Regulations 40 CFR 49 - Air Quality Implementation Plans; Navajo Nation 07/09/2013National
Proposed Regulations 40 CFR 49 - Approval and Promulgation of Implementation Plans; Swinomish Indian Tribal Community; Tribal Implementation Plan 05/02/2014National
Proposed Regulations 40 CFR 49 - Approval of Air Quality Implementation Plans; Navajo Nation; Regional Haze Requirements for Navajo Generating Station; Extension of Comment Period 03/19/2013National
Notices 40 CFR 49 - Approval of Air Quality Implementation Plans; Navajo Nation; Regional Haze Requirements for Navajo Generating Station; Notice of Intent To Hold Public Hearings 06/19/2013National
Proposed Regulations 40 CFR 49 - Approval of Air Quality Implementation Plans; Navajo Nation; Regional Haze Requirements for Navajo Generating Station; Proposed Rule 02/05/2013National
Proposed Regulations 40 CFR 49 - Approval of Air Quality Implementation Plans; Navajo Nation; Regional Haze Requirements for Navajo Generating Station; Supplemental Proposal 10/22/2013National
Proposed Regulations 40 CFR 49 - Source Specific Federal Implementation Plan for Implementing Best Available Retrofit Technology for Four Corners Power Plant; Navajo Nation; Extension of Notification Deadline 07/11/2013National
Proposed Regulations 40 CFR 50 - Method for the Determination of Lead in Total Suspended Particulate Matter 02/05/2013National
Notices 40 CFR 50 - Notice of Workshop in Support of the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Sulfur 02/13/2014National
Proposed Regulations 40 CFR 50, 51, 70 and 71 - Implementation of the 2008 NAAQS for Ozone: SIP Requirements and Notice of extension of comment period 07/24/2013National
Proposed Regulations 40 CFR 50, 51, 70 and 71 - Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements 08/27/2013National
Proposed Regulations 40 CFR 50, 51,70 et al. - Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements; Proposed Rule 06/06/2013National
Proposed Regulations 40 CFR 51 - Air Quality Implementation Plans; Arizona 02/17/2014National
Final Regulations 40 CFR 51 - Air Quality: Revision to Definition of VOC--Exclusion of trans 1-chloro-3,3,3-trifluoroprop-1-ene [SolsticeTM 1233zd(E)] 04/18/2013National
Final Regulations 40 CFR 51 - Air Quality: Revision to Definition of Volatile Organic Compounds--Exclusion of 2,3,3,3-tetrafluoropropene 10/22/2013National
Proposed Regulations 40 CFR 51 - Air Quality: Revision to the Regulatory Definition of Volatile Organic Compounds--Exclusion of 2-amino-2-methyl-1-propanol (AMP) 03/27/2014National
Final Regulations 40 CFR 51 - Air Quality: Revision to the Regulatory Definition of Volatile Organic Compounds--Exclusion of 2-amino-2-methyl-1-propanol (AMP) 03/27/2014National
Proposed Regulations 40 CFR 51 - Compliance With the CAIR or the NOX SIP Call 07/15/2014National
Proposed Regulations 40 CFR 51 - Data Requirements Rule for the 1-Hour Sulfur Dioxide (SO2) Primary National Ambient Air Quality Standard (NAAQS) 05/13/2014National
Proposed Regulations 40 CFR 51 - Identification of Nonattainment Classification and Deadlines for Submission of State Implementation Plan (SIP) Provisions for the 1997 Fine Particle (PM2.5) National Ambient Air Quality Standard (NAAQS) and 2006 PM2.5 NAAQS 11/21/2013National
Proposed Regulations 40 CFR 51 - Partial Approval and Disapproval of Air Quality Implementation Plans; Arizona; Regional Haze and Visibility Transport; Extension of Comment Period 02/04/2013National
Final Regulations 40 CFR 51 - Revision to Definition of Volatile Organic 02/15/2013National
Proposed Regulations 40 CFR 51 - Revision to Definition of Volatile Organic Compounds 02/15/2013National
Final Regulations 40 CFR 51 - Revision to Definition of Volatile Organic Compounds--Exclusion of a Group of Four Hydrofluoropolyethers (HFPEs) 02/12/2013National
Final Regulations 40 CFR 51 - Revision to Definition of Volatile Organic Compounds--Exclusion of trans 1-chloro-3,3,3-trifluoroprop-1-ene 08/28/2013National