TMDLs and 303(d) List - What Are TMDLs?

A Total Maximum Daily Load, or TMDL, is a regulation designed to improve water quality by controlling the amount of a pollutant entering a water body. For more detailed information on TMDLs, visit the State Water Board’s TMDL information page.

• General TMDL Information (via the State Water Board’s web site)
• TMDL Questions and Answers (via the State Water Board’s web site), 255 KB, PDF (PDF Info)
• Overview of the Central Valley TMDL Program, 103 KB, PDF (PDF Info)