Welcome to the California Regional Water Quality Control Board, Central Valley Region Welcome to the California Environmental Protection Agency
Governor
My Water Quality
Performance Report
Central Valley Regional Water Board Brochure
Central Valley Regional Water Board Groundwater Quality Protection Strategy

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.


--Web page updated 08/28/2007