Laws & Regulations

Reporting Requirements for Continuous Releases of Hazardous Substances, A Guide for Facilities on Compliance

This Guide provides facilities with the information necessary to successfully comply with the continuous release reporting.

CWA Section 401 Regulatory Requirements

Clean Water Act Section 401 rulemaking effort

What’s New Regarding Drinking Water System Operations in Wyoming and on Tribal Lands in EPA Region 8

This website is designed for the use of owners, operators. and administrative staff who work at public water supply systems in Wyoming and on Tribal lands within the jurisdiction of region 8

MOVES Versions in Limited Current Use

Information about prior versions of MOVES that may be appropriate for continued use in some circumstances.

Latest Version of MOtor Vehicle Emission Simulator (MOVES)

Background, guidance, and installation information for the latest version of EPA's MOtor Vehicle Emission Simulator (MOVES).

Removal of Affirmative Defense Provisions from Specified New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants

Information about the rulemaking proposal and guidance for reclassifying major sources as area sources under plain language reading of the Clean Air Act.

Michigan NPDES Permits

NPDES water permits issued in Michigan.

Discharge Monitoring Report-Quality Assurance Study Program

Main page for EPA Office of Compliance's Discharge Monitoring Report - Quality Assurance (DMR-QA) Study Program.

2025 Discharge Monitoring Report - Quality Assurance (DMR-QA) Study 45

This letter initiates the 2025 Discharge Monitoring Report - Quality Assurance (DMR-QA) Study 45

Great Lakes Water Quality Agreement (GLWQA)

The Great Lakes Water Quality Agreement between the U.S. and Canada addresses critical environmental health issues in the Great Lakes region. It's a model of binational cooperation to protect water quality. It was first signed in 1972 and amended in 2012.

(Draft Permit) York Sewer District POTW, York, ME, ME0101222

A public notice of a draft MEPDES permit for York Sewer District POTW, York, ME, ME0101222.

Geographic Locations: Maine

Complying with Air Emissions Standards for Stationary Sources

Assists with determinations about whether an emissions standard applies. Provides information on compliance with applicable standards including requests for alternatives, waivers, and extensions to requirements like test methods or monitoring, etc.

Ozone National Ambient Air Quality Standards Section 176 Petitions

Petitions submitted under Section 126 of the Clean Air Act

Mora Independent School District Athletic Field Project - NPDES Permit No. NM0031097

Mora Independent School District Athletic Field Project ,npdes permit

Proposed Administrative Order issued to TravelCenters of America, Inc. for Clean Water Act Violations

EPA is authorized to issue Orders assessing civil penalties for various violations of the Clean Water Act (CWA).

Comments Due Date: July 16, 2025
Geographic Locations: Oklahoma, Ohio

§401 CWA Water Quality Certification for Discharges related to U.S. Army Corps of Engineers Honolulu District Nationwide General Permit 6 for Survey Activities on Wake Atoll

Request for comments on Section 401 Clean Water Act (CWA) Water Quality Certification for discharges related to the U.S. Army Corps of Engineers, Honolulu District Nationwide General Permit 6 for USAF survey activities on Wake Atoll.

Comments Due Date: June 20, 2025
Geographic Locations: Southwest, Hawaii