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.

• 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)