Cal. Water Code § 13907

Any action, report, determination, or regulation taken or adopted by a regional board, or any failure of a regional board to act may be reviewed by the state board, and shall be reviewed by the state board on the request of any affected city or county. The state board has all powers as to the review of action or inaction of a regional board under this article as it has to other action or inaction of a regional board, including all powers granted to a regional board to initially determine areas in which discharges of waste from houseboats are inadequately regulated by local ordinance and to adopt regulations when a city or county fails to do so, if the state board finds that appropriate action has not been taken by a regional board. Any action of a regional board under this chapter or any city or county ordinance affected by the review of the state board shall have no force or effect during the period of the review by the state board.