To: Board of Supervisors
From: Warren Lai, Public Works Director/Chief Engineer
Report Title: Introduction of Ordinance No. 2025-01 to amend Division 1014 Stormwater Management and Discharge Control, Countywide.
?Recommendation of the County Administrator ? Recommendation of Board Committee
RECOMMENDATIONS:
INTRODUCE Ordinance No. 2025-01 to amend Division 1014 of the Ordinance Code (Stormwater Management and Discharge Control) to enact new stormwater source control, site design, and stormwater treatment requirements required by the new Municipal Regional Stormwater National Pollutant Discharge Elimination System (NPDES) Permit issued by the California Regional Water Quality Control Board, San Francisco Bay Region (RWQCB), Order No. R2-2022-0018, NPDES Permit No. CAS612008; WAIVE reading; and FIX February 4, 2024, for adoption.
FISCAL IMPACT:
This project is funded by 100% Stormwater Utility Assessment Funds. Project No. 7517-6W7087
BACKGROUND:
The federal Clean Water Act (33 U.S. C., ? 1251, et seq.) and the state Porter-Cologne Water Quality Control Act (Cal. Wat. Code, ? 13000, et seq.) prohibit discharges of stormwater without a permit from the appropriate California regional water quality control board issued under the NPDES program. The RWQCB issued two prior permits regulating stormwater discharges by Contra Costa County (County) - NPDES Permit No CAS612008, Order No. R2-2009-0074, and NPDES permit CAS612008, issued November 19, 2015 (Order No. R2-2015-0049), as amended by Order R2-2019-0004, issued February 13, 2019. The permits regulated stormwater discharges by the County and required the County to impose discharge requirements on developments. After each order was issued, the County amended Division 1014 of the Ordinance Code (Stormwater Management and Discharge Control) to impose stormwater management and discharge requirements on new developments consistent with the permit requirements.
In 2020, the Contra Costa Clean Water Program, which includ...
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