Laws & Regulations

Quantifying Actual or Potential Emissions for Permitting Purposes

Explanation of the meaning of Regulated New Source Review (NSR) Pollutants

Urban Runoff: Model Ordinances for Aquatic Buffers

Aquatic Buffers serve as natural boundaries between local waterways and existing development. The model and example ordinaces below provide suggested language or technical guidance designed to create the most effective stream buffer zones possible.

For Residents

Basic page important resident information.

Stockbridge-Munsee Community Wastewater Ponds NPDES Permit in Wisconsin

NPDES permit documents for Neopit Wastewater Treatment Facility on the Menominee Indian Reservation in Neopit, Idaho

Examples of Equivalent Processes: PFRP and PSRP

Equivalent Processes: PFRP and PSRP

Documents Related to Illinois NPDES Program agreement in Illinois

Illinois petition to withdraw the NPDES program. Initial Results of an Informal Investigation of the National Pollutant Discharge Elimination System Program
for Concentrated Animal Feeding Operations
in the State of Illinois

Superfund Removal Guidance for Preparing Action Memoranda

Dated September 2009, this updates and replaces previous documents. An Action Memo (AM) should substantiate need for removal action based upon criteria in the National Oil and Hazardous Substances Pollution Contingency Plan (NCP). Includes AM template.

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.

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.

Interconnected Nature of Cross-State Air Pollution

Map of facilities showing regional ozone transport and the upwind-downwind linkages for ozone.

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

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

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.

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.

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