Total Maximum Daily Loads (TMDLs) and the 303(d) List of Impaired Water Bodies
Total Maximum Daily Loads (TMDLs) are action plans to restore clean water. Section 303(d) of the federal Clean Water Act requires that states identify water bodies -- bays, rivers, streams, creeks, and coastal areas -- that do not meet water quality standards, and the pollutants that impair them. TMDLs examine the water quality problems, identify sources of pollutants, and specify actions that create solutions. They are adopted by the Regional Water Board as amendments to our Region's Basin Plan. For more information about TMDLs, click here.
Cleaning up PCBs in San Francisco Bay, June 2012 (PDF file).
How TMDLs Are Adopted: The Basin Planning Process, February 2004 (PDF file)