Welcome to the State Water Resources Control Board Welcome to the California Environmental Protection Agency
Governor's Website Visit the Water Board Members Page
Agendas
My Water Quality
Performance Report
State Water Resources Control Board

Impaired Water Bodies

Listing a water body as impaired in California is governed by the Water Quality Control Policy for developing California's Clean Water Act Section 303(d) Listing Policy. The State and Regional Water Boards assess water quality data for California's waters every two years to determine if they contain pollutants at levels that exceed protective water quality criteria and standards. This biennial assessment is required under Section 303(d) of the Federal Clean Water Act.

  • Fact Sheet - "2010 Integrated Report on Water Quality with Web-Based Interactive Map," April 2010

Please allow time for the information below to appear.  Tabs will be available to navigate to various topics.