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Mobile Sources
National Summary
The Clean Air Act (CAA) of 1970 established the first initiative to control emissions from motor vehicles, but the 1990 Clean Air Act Amendments (CAAA) significantly strengthened mobile source emissions requirements through the implementation of mandatory programs and the establishment of voluntary programs to help address mobile source contributions to various air pollution problems.
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Notices 2017 and Later Model Year Light-Duty Vehicle Greenhouse Gas Emissions and Corporate Average Fuel Economy Standards 11/15/2012National
Final Regulations 40 CFR 1037, 1039, 1042, 1068 and 49 CFR Part 535 - Heavy-Duty Engine and Vehicle and Nonroad 08/16/2013National
Final Regulations 40 CFR 1037, 1039, 1042, and 1068 - Heavy-Duty Engine and Vehicle and Nonroad Technical Amendments 09/12/2013National
Final Regulations 40 CFR 1039, 1042, and 1068 - Nonroad Technical Amendments 02/06/2014National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans, Kentucky 09/25/2013National
Final Regulations 40 CFR 52 - Adequacy Status of the Submitted 2009 and 2025 PM2.5 Motor Vehicle Emission Budgets for Transportation Conformity Purposes for New Jersey 06/24/2013National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans; North Carolina 09/23/2013National
Proposed Regulations 40 CFR 52 - Air Quality Implementation Plans, Kentucky 05/16/2013National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans, Maryland 06/11/2013National
Proposed Regulations 40 CFR 52 - Air Quality Implementation Plans, Maryland 07/09/2014National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans, Maryland 07/09/2014National
Proposed Regulations 40 CFR 52 - Air Quality Implementation Plans, Massachusetts and New Hampshire 01/25/2013National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans, Massachusetts and New Hampshire 01/25/2013National
Proposed Regulations 40 CFR 52 - Air Quality Implementation Plans; Connecticut 01/27/2014National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans; Texas 03/17/2014National
Final Regulations 40 CFR 52 - Air Quality Implementation Plans; Texas 07/25/2014National
Final Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Charlotte, Raleigh/Durham and Winston-Salem Carbon Monoxide Limited Maintenance Plan 06/20/2013National
Proposed Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Illinois; Amendments to Vehicle Inspection and Maintenance Program for Illinois 11/14/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; New Hampshire; Decommissioning of Stage II Vapor Recovery Systems 05/29/2014National
Proposed Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Removal of the Regulation for the National Low Emission Vehicle Program 11/14/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Virginia; Removal of the Regulation for the National Low Emission Vehicle Program 11/14/2013National
Proposed Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Wisconsin; Amendments to Vehicle Inspection and Maintenance Program for Wisconsin 04/25/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Air Quality Implementation Plans; Wisconsin; Amendments to Vehicle Inspection and Maintenance Program for Wisconsin 09/19/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Implementation Plans; Arizona; Motor Vehicle Inspection and Maintenance Programs 05/22/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Implementation Plans; Kansas; Idle Reduction of Heavy-Duty Diesel Vehicles and NOx Emissions Reduction for the Kansas City Ozone Maintenance Area 02/20/2013National
Final Regulations 40 CFR 52 - Approval and Promulgation of Implementation Plans; Kentucky; Stage II Requirements for Hertz Corporation Facility at Cincinnati/Northern Kentucky International Airport in Boone County 05/22/2014National
Final Regulations 40 CFR 52 - Approval and Promulgation of Implementation Plans; North Carolina: Non-Interference Demonstration for Removal of Federal Low Reid Vapor Pressure Requirement for the Raleigh-Durham-Chapel Hill Area 01/02/2014National
Final Regulations 40 CFR 52 - Approval and Promulgation of Implementation Plans; North Carolina: Non-Interference Demonstration for Removal of Federal Low-Reid Vapor Pressure Requirement for the Greensboro/Winston-Salem/High Point Area 01/24/2014National
Proposed Regulations 40 CFR 52 - Approval and Promulgation of Kansas SIP - Idle Reduction of Heavy-Duty Diesel Vehicles and Reduction of Nitrogen Oxides Emissions for the Kansas City Ozone Maintenance Area 02/20/2013National
Proposed Regulations 40 CFR 80, 85, 86, 600, 1036, 1037, 1065, and 1066 - Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards 05/29/2013National
Proposed Regulations 40 CFR 85, 86, 1036, 1037, 1039, 1042, 1048, 1054, 1065, 1066, 1068 - Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments 06/17/2013National
Final Regulations 40 CFR 86 - Nonconformance Penalties for On-Highway Heavy-Duty Diesel Engines 09/05/2012National
Final Regulations 40 CFR 87 - Control of Air Pollution From Aircraft and Aircraft Engines 10/31/2012National
Final Regulations 40 CFR Part 52 - Approval and Promulgation of Air Quality Implementation Plans; Texas; Approval of Texas Motor Vehicle Rule Revisions 01/31/2014National
Proposed Regulations 40 CFR Parts 79, 80, 85 et al. - Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards 05/21/2013National
Proposed Regulations 40 CFR Parts 79, 80, 85 et al. - Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards (continued) 05/21/2013National
Final Regulations 40 CFR Parts 85, 86, 1036, et al. - Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments 06/17/2013National
Notices Access by EPA Contractors to Information Claimed as Confidential Business Information (CBI) Submitted Under Title II of the Clean Air Act and Related to the Nonroad Diesel Engine Program 02/21/2013National
Notices Agency Information Collection Activities - Requirements for Nonroad Spark Ignition Engines 08/29/2012National
Notices Agency Information Collection Activities - Submission to OMB for Review and Approval - Enforcement Policy Regarding the Sale and Use of Aftermarket Catalytic Converters (Renewal) 07/27/2012National