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

Water Quality Standards & Limits

  • Basin Plan
    Two Basin Plans contain the water quality standards for the Central Valley Region and implementation programs and policies to achieve these standards.
  • California Toxics Rule (CTR)
    This regulation of the U.S. Environmental Agency (Title 40 of the Code of Federal Regulations, Section 131.38) promulgated water quality standards for surface waters of California.
  • A Compilation of Water Quality Goals
    Numeric water quality thresholds from the literature for over 860 chemical constituents and water quality parameters. The text of the report explains, with examples, how these thresholds may be used to assess protection of beneficial uses of water resources in the context of California's quality standards. A summary of relevant statutes, regulations, plans, and policies and links to original references are included.

--Web page updated 05/19/2011