CA Water Code § 13383.5 (2021)
2021 California Code|Water Code - WAT|DIVISION 7 - WATER QUALITY|CHAPTER 5.5 - Compliance With the Provisions of the Federal Water Pollution Control Act as Amended in 1972|Section 13383.5.

13383.5.  (a) As used in this section, “regulated municipalities and industries” means the municipalities and industries required to obtain a storm water permit under Section 402(p) of the Clean Water Act (33 U.S.C. Sec. 1342(p)) and implementing regulations.(b) This section only applies to regulated municipalities that were subject to a storm water permit on or before December 31, 2001, and to regulated industries that are subject to the General Permit for Storm Water Discharges Associated with Industrial Activities Excluding Construction Activities.(c) Before January 1, 2003, the state board shall develop minimum monitoring requirements for each regulated municipality and minimum standard monitoring requirements for regulated industries. This program shall include, but is not limited to, all of the following:(1) Standardized methods for collection of storm water samples.(2) Standardized methods for analysis of storm water samples.(3) A requirement that every sample analysis under this program be completed by a state certified laboratory or by the regulated municipality or industry in the field in accordance with the quality assurance and quality control protocols established pursuant to this section.(4) A standardized reporting format.(5) Standard sampling and analysis programs for quality assurance and quality control.(6) Minimum detection limits.(7) Annual reporting requirements for regulated municipalities and industries.(8) For the purposes of determining constituents to be sampled for, sampling intervals, and sampling frequencies, to be included in a municipal storm water permit monitoring program, the regional board shall consider the following information, as the regional board determines to be applicable:(A) Discharge characterization monitoring data.(B) Water quality data collected through the permit monitoring program.(C) Applicable water quality data collected, analyzed, and reported by federal, state, and local agencies, and other public and private entities.(D) Any applicable listing under Section 303(d) of the Clean Water Act (33 U.S.C. Sec. 1313).(E) Applicable water quality objectives and criteria established in accordance with the regional board basin plans, statewide plans, and federal regulations.(F) Reports and studies regarding source contribution of pollutants in runoff not based on direct water quality measurements.(d) The requirements prescribed pursuant to this section shall be included in all storm water permits for regulated municipalities and industries that are reissued following development of the requirements described in subdivision (c). Those permits shall include these provisions on or before July 1, 2008. In a year in which the Legislature appropriates sufficient funds for that purpose, the state board shall make available to the public via the Internet a summary of the results obtained from storm water monitoring conducted in accordance with this section.(Added by Stats. 2001, Ch. 492, Sec. 1. Effective January 1, 2002.)