State and Regional Water Boards

The Water Boards map is being upgraded. Please use the dropdown menu to visit each regional board's website.

State Water Resources Control Board
The Nine Regional Water Quality Control Boards in California - Fact Sheet (.pdf)
(View the Regional Boards' websites. See the map below.)
State and Regional Water Boards Brochure (.pdf)
California Regional Water Quality Control Boards - A list of the Regional Boards, their addresses, main telephone and fax numbers.
Regional Water Quality Control Boards

(Page last updated 02/26/2026)

Water is a precious resource in California, and maintaining its quality is of utmost importance to safeguard the health of the public and the environment.

State and Regional Water Boards

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