Laws & Regulations
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Tribal Clean Water Act 106 Reporting Requirements Overview
This page is an overview of 106 Reporting Requirements for Tribes in EPA's Pacific Southwest (Region 9).
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Uniform National Discharge Standards (UNDS): Outreach
Describes the Federalism and Tribal consultation efforts related to the Uniform National Discharge Standards (UNDS) and links to copies of each presentation, both to state and local representatives, as well as federally-recognized tribes.
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Tribal Minor New Source Review Permitting in Region 8
Tribal NSR permitting in EPA Region 8, for 27 Tribal Nations in Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming.
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Stationary Gas and Combustion Turbines: New Source Performance Standards (NSPS)
learn about the NSPS rules for stationary gas turbines by reading the rule summary, rule history, docket additional documents, and economic and regulatory impact analyses.
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Water Quality Standards Regulations: Pueblo of Nambe
Information related to Water Quality Standards for Pueblo of Nambe.
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Build America, Buy America (BABA) Act Waivers Open for Public Comment
Information about the Build America, Buy America Act Waivers and Waiver Process
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Clean Air Act (CAA) Program Delegation Status for Other Rules in Louisiana
Other Rules in Louisiana
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Synthetic Organic Chemical Manufacturing Industry: National Emission Standards for Hazardous Air Pollutants (NESHAP) - 40 CFR 63 Subparts F,G,H,I
Read about the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Synthetic Organic Chemical Manufacturing Industry. Read the rules, find the CFR text, dockets, effective dates, rule history and compliance information.
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Hazardous Organic NESHAP - Frequent Questions
Frequently asked questions related to the final Hazardous Organic NESHAP (HON) issued in 2024
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Historical Regulations Impacting Cross-State Air Pollution
On this page find a list of rulemakings relevant to interstate air pollution transport.
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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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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.