An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Impaired Waters and TMDLs

Listing Waters Impaired by Atmospheric Mercury: Voluntary Subcategory 5m for States with Comprehensive Mercury Reduction Programs

The document presents information regarding a voluntary approach for listing waters impaired by mercury predominantly from atmospheric sources pursuant to Clean Water Act Section 303(d), also known as "subcategory 5m." The approach uses Clean Water Act tools to encourage comprehensive state and regional mercury control programs. The voluntary 5m approach was developed in a cooperative effort among EPA headquarters offices, EPA regional offices and interested state and other stakeholders.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Listing Waters Impaired by Atmospheric Mercury Under Clean Water Act Section 303(d): Voluntary Subcategory 5m for States with Comprehensive Mercury Reduction Programs (PDF)(20 pp, 126 K)