United States

Hexavalent Chromium: Questions and Answers

Information about Clean Water Act analytical methods for measurement of hexavalent chromium in water (40 CFR Part 136)

Cooling Water Intakes Rulemaking History

Rulemaking history for Cooling Water Intake regulations under Clean Water Act, with Federal Register notices and support documents.

Method Detection Limit - Frequent Questions

Questions & answers about the revised Method Detection Limit procedure issued as part of the 2017 Methods Update Rule (amendments to 40 CFR Part 136)

Approved CWA Test Methods: Questions and Answers

Frequent questions/answers about approved analytical methods (40 CFR Part 136)

Local Foods, Local Places

The Local Foods, Local Places technical assistance program protects human health and the environment, spurs revitalization, increases access to healthy foods, and creates economic opportunities by promoting local foods.

EPA Proposes to Delete Corozal Well Superfund Site from National Priorities List

In a step that illustrates another Superfund success, U.S. Environmental Protection Agency (EPA) is proposing to delete the Corozal Well Superfund site, located in the central mountain town of Corozal, Puerto Rico, from the National Priorities List (NPL)

• Release Date: September 12, 2025

2019 Jaques Compressor Station Common Source Determination

This document is part of the Title V and NSR Policy and Guidance Database.

Update to Sanctions Policy for State Title V Operating Permits Programs

This document is part of the Title V Policy and Guidance Database

2019 Order Denying in a Petition for Object to Title V Operating Permit for Mill Creek

This document is part of the title V petition database.

2017 Petition Requesting the Administrator Object to Title V Permit for Wisconsin Proppants

This document is part of the Title V Petition Database.

2017 Petition Requesting the Administrator Object to Title V Permit for Raven Power - Fort Smallwood

This document is part of the Title V Petition Database.

Sanctions Policy for State Title V Operating Permits Programs

This document is part of the Title V Policy and Guidance Database

National Lakes Assessment 2012 Key Findings

Key findings from the 2012 National Lakes Assessment

Construction Activities Allowed Before Obtaining a Preconstruction Air Permit

This database is part of the NSR Policy & Guidance Database.

Quality Assurance Project Plan for the Enbridge Oil Response

This Quality Assurance Project Plan presents organization, objectives, planned activities, and specific quality assurance/quality control (QA/QC) procedures.

TSMC Arizona Begin Actual Construction - EPA Response Letter

This document is part of the NSR Policy & Guidance Database.

2019 Jaques Compressor Station Common Source Determination

This document is part of the Title V and NSR Policy and Guidance Database.

Applicability of NSR Review Circumvention Guidance to 3M - Maplewood, Minnesota

This document is part of the NSR Policy and Guidance Database.

Meat and Poultry Products Effluent Guidelines

Overview and documents for Meat and Poultry Products Effluent Guidelines (40 CFR Part 432)

Use of ASOS Meteorological Data in AERMOD Dispersion Modeling

This document is part of the NSR Policy & Guidance Database.