About EPA

What You Can Do for Voluntary Wetland Restoration and Protection

Resource page for voluntary wetland restoration and protection.

Basic Information about Voluntary Wetland Restoration and Protection

Landing page for Voluntary Wetland Restoration and Protection.

Overview of Early Transfer Guidance

To implement Congressionally mandated action, the U.S. Environmental Protection Agency (EPA) has issued guidance on the transfer of federal property contaminated with hazardous wastes, before cleanup completion. This eplains the early transfer process

Status of EPA's Interim Assessment Guidance for Perchlorate

This memorandum provides information concerning the status of the interim assessment guidance for perchlorate originally transmitted on June 18, 1999 (the '1999 Interim Guidance').

Streamlining Federal Facility Cleanup

The purpose of this fact sheet is to summarize findings from a newly released report entitled 'Streamlining Initiatives: Impact of Federal Facilities Cleanup Process.

Support for Department of War Cleanup Implementation for Base Realignment and Closure (BRAC) Installations Rounds I-IV

This Memorandum of Understanding establishes responsibilities and funding for the EPA’s assistance in accelerating restoration and cleanup decisions at selected installations.

Support for Department of War Cleanup Implementation for Base Realignment and Closure Installations Rounds I-IV 2005

This Memorandum of Understanding establishes responsibilities and funding for the EPA’s assistance in accelerating restoration and cleanup decisions at selected installations.

Memorandum of Understanding between the U.S. Environmental Protection Agency and the U.S. Department of War

This page contains a memorandum of understanding regarding support for implementation of fast track cleanup at closing Department of Defense (DoD) installations.

Notice of Willingness to Participate in Funding Opportunities of Other Federal Agencies

OTAQ’s Participation Policy allowing researchers to collaborate with other federal and non-federal non-profit institutions; background, responsibilities, approval process, ethical and procedural guidelines are included. (EPA publication # EPA-420-F-20-011)

Remote Sensing and Imagery Analysis Service

Overview of Remote Sensing and Imagery Analysis Services at the EPA

All Appropriate Inquiries: Reporting Requirements Checklist for Assessment and Multipurpose Grant Recipients

This page contains the document, "Fact Sheet: All Appropriate Inquiries: Reporting Requirements Checklist for Assessment and Multipurpose Grant Recipients."

EPA in the Pacific Southwest Videos

Videos highlighting projects, events and environmental issues in or related to the EPA's Pacific Southwest (Region 9).

Re: Request for Correction (#14003) under the EPA Information Quality Guidelines

Request from Anne LeHuray to update inaccurate information concerning RTS Summary Exhibits B and C.

Photo Galleries for the Mystic River Watershed

Collection of photo galleries for the Mystic River Watershed

Bringing the Benefits of Energy Efficiency and Renewable Energy to Low-Income Communities: Case Studies and Program Profiles

Helps state and local staff connect with EPA initiatives that can assist them in expanding or developing their own EE/RE energy and climate initiatives in ways that benefit low-income communities.

ICYMI: EPA’s New Guidance Removes Requirement for Diesel Exhaust Fluid (DEF) Sensors, Saves American Operators Billions

On Friday, March 27, 2026, President Trump announced U.S. EPA Administrator Lee Zeldin has issued new guidance making it clear DEF sensors are no longer required, and NOx sensors can be used instead to meet regulatory requirements.

Release Date: March 31, 2026