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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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 2570 items in 65 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
Final Regulations 05/03/01 - Final Rule - Approval of Redesignation of Shelby County, Tennessee, to Attainment for Lead (40 CFR Part 52) 05/05/2001National
Proposed Regulations 05/11/01 - Proposed Rule - Approval and Promulgation of Air Quality Implementation Plans; CO (40 CFR Parts 52 and 81) 09/01/2001National
Proposed Regulations 05/18/01 - Proposed Rule - Clean Air Act Reclassification, San Joaquin Valley Nonattainment Area (40 CFR Parts 52, 81) 05/21/2001National
Final Regulations 05/24/01 - Final Rule - Revisions to the CA and AZ SIPs (40 CFR Part 52) 05/28/2001National
Final Regulations 05/25/01 - Final Rule - Attainment Date Extension for the Fairbanks North Star Bureau CO Nonattainment Area (40 CFR Part 52) 05/28/2001National
Final Regulations 05/30/01 - Final Rule - Determination of Attainment of the 1-Hour Ozone Standard for the Phoenix Metropolitan Area, AZ (40 CFR Part 81) 06/03/2001National
Proposed Regulations 05/30/01 - Proposed Rule - Redesignation of the Pittsburgh-Beaver Valley Ozone Nonattainment Area to Attainment (40 CFR Parts 52 and 81) 06/03/2001National
Final Regulations 05/31/01 - Final Rule - Approval and Promulgation of Implementation Plans; IN (2) (40 CFR Part 52) 06/03/2001National
Final Regulations 05/31/01 - Final Rule - Approval and Promulgation of Implementation Plans; IN (40 CFR Part 52) 06/03/2001National
Final Regulations 05/31/01 - Final Rule - Clarifying Revisions to 9 VAC 5 Chapter 40 Fuel Burning Equipment (40 CFR Part 52) 06/03/2001National
Final Regulations 05/31/01 - Final Rule - Nonattainment Major Stationary Source Revision; LA (40 CFR Part 52) 06/03/2001National
Final Regulations 06/12/01 - Final Rule - Approval and Promulgation of Air Quality Implementation Plans; Montana (40 CFR Part 52) 06/14/2001National
Final Regulations 06/12/01 - Final Rule - Revisions to the California SIP, Monterey Bay Unified Air Pollution Control District (40 CFR Part 52) 06/14/2001National
Final Regulations 06/25/01 - Final Rule - Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania (40 CFR Part 52) 06/27/2001National
Final Regulations 06/26/01 - Final Rule - Approval and Promulgation of Implementation Plans; Illinois and Missouri (40 CFR Parts 52 & 81) 09/01/2001National
Proposed Regulations 06/26/01 - Proposed Rule - Revisions to California SIP; Imperial County (40 CFR Part 52) 06/27/2001National
Final Regulations 06/27/01 - Final Rule - Determination of Attainment for the Carbon Monoxide NAAQS for Metropolitan Denver (40 CFR Part 52) 06/27/2001National
Final Regulations 07/16/01 - Final Rule - Approval and Promulgation of SIP; Texas; Transportation Control Measures (40 CFR Part 52) 07/22/2001National
Final Regulations 08/03/01 - Final Rule - Approval & Promulgation of SIP; Oregon (40 CFR Part 52) 08/14/2001National
Final Regulations 08/03/01 - Notice - Notice of Data Availability for the NOx SIP Call and Section 126 Rule (40 CFR Parts 51,52,96,97) 08/14/2001National
Proposed Regulations 08/03/01 - Proposed Rule - Approval & Promulgation of SIP; Indiana; Ozone (40 CFR Part 52) 09/01/2001National
Notices 2002 Clean Air Excellence Awards Program 08/24/2002National
Notices 2009 Fall Meeting of the Ozone Transport Commission 10/13/2009National
Notices 2010 Fall Meeting of the Ozone Transport Commission 09/24/2010National
Notices 2012 Annual Meeting of the Ozone Transport Commission 03/15/2012National
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
Proposed Regulations 40 CFR 52 - Air Quality Implementation Plans, District of Columbia, Maryland, Virginia 09/20/2011National
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 136 - Guidelines Establishing Test Procedures for the Analysis of Pollutants Under the Clean Water Act; Analysis and Sampling Procedures; Notice of Data Availability 12/14/2011National
Proposed Regulations 40 CFR 190 - Environmental Radiation Protection Standards for Nuclear Power Operations 02/04/2014National
Proposed Regulations 40 CFR 302 and 355 - Administrative Reporting Exemption for Certain Air Releases of NOx 10/04/2005National
Final Regulations 40 CFR 302 and 355 - Administrative Reporting Exemption for Certain Air Releases of NOx 10/04/2006National
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
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