Laws & Regulations
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Proposed Cross-State Air Pollution Update Rule
Learn about the the Cross-State Air Pollution Rule (CSAPR) for the 2008 Ozone NAAQS which addresses interstate air pollution transport in 23 eastern states under the Clean Air Act.
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What Does the Clean Air Act Say about Cross-State Air Pollution?
Learn about the sections of the Clean Air Act that address Cross-State Air Pollution.
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Memo: Supplemental Information on Interstate Transport SIPs for the 2008 Ozone NAAQS
This memo provides supplemental information to states and EPA Regional offices as they develop or review SIPs that address section 11 O(a)(2)(D)(i)(I) of the CAA, as it pertains to the 2008 NAAQS.
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Interconnected Nature of Cross-State Air Pollution
Map of facilities showing regional ozone transport and the upwind-downwind linkages for ozone.
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Findings of Failure to Submit a Clean Air Act Section 110 State Implementation Plan for Interstate Transport for the 2015 Ozone National Ambient Air Quality Standards (NAAQS)
EPA is finding that seven states failed to submit complete interstate transport State Implementation Plans or SIPs for the 2015 8-hour ozone National Ambient Air Quality Standards
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Rescission of the Finding of Failure to Submit a Clean Air Act Section 110 State Implementation Plan for Interstate Transport for the 2015 Ozone National Ambient Air Quality Standards (NAAQS)
EPA is finding that seven states failed to submit complete interstate transport State Implementation Plans or SIPs for the 2015 8-hour ozone National Ambient Air Quality Standards
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March 2018 Memo and Supplemental Information Regarding Interstate Transport SIPs for the 2015 Ozone NAAQS
Projected air quality modeling results for ozone in 2023: States can use these data to develop their implementation plans.
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Section 184(c) Supplemental Notice
Notice of Public Hearing and Supplemental Information regarding the Ozone Transport Commission (OTC) Recommendation that EPA Require Daily Limits for Emissions of Nitrogen Oxides from Certain Sources in Pennsylvania.
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Infrastructure for New HAP Additions
Information about the rulemaking pr.
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Final Disapproval of “Good Neighbor” State Implementation Plans Addressing Interstate Transport Obligations for the 2015 Ozone National Ambient Air Quality Standards
Final Disapproval of “Good Neighbor” State Implementation Plans Addressing Interstate Transport Obligations the 2015 Ozone National Ambient Air Quality Standards
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Memo and Supplemental Information Regarding Interstate Transport SIPs for the 2015 Ozone NAAQS
Projected air quality modeling results for ozone in 2023: States can use these data to develop their implementation plans.
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Ozone Transport Commission (OTC) Clean Air Act Section 184(c) Recommendation
This page includes information about OTC's 184(c) petition to EPA.
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Cross-State Air Pollution Rule - Supplemental Rules
Supplemental rules to the Cross-State Air Pollution Rule
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EME Homer City Vs. EPA - Court Opinion
Opinion issued July 28, 2015 by the U.S. Court of Appeals for the D.C. Circuit on the remaining issues raised with respect to the Cross-State Air Pollution Rule
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Date Change Affirmation Rules for the Cross-State Air Pollution Rule (CSAPR)
Rulemaking to Affirm Interim Amendments to Dates in Federal Implementation Plans Addressing Interstate Transport of Ozone and Fine Particulate Matter
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Responses to 40 CFR Part 75 Petitions - 2024
Petition responses in 2024
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Responses to 40 CFR Part 75 Petitions - 2022
Petition responses in 2022
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Automotive Sectors (NAICS 336, 4231, 8111)
Find regulatory, compliance, and enforcement information for environmental laws and regulations for the automotive sectors, which includes transportation equipment manufacturing, and establishments involved in repair and maintenance services for vehicles
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Responses to 40 CFR Part 75 Petitions - 2023
Petition responses in 2023
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Responses to 40 CFR Part 75 Petitions - 2020
Approval for an alternative data substitution methodology.