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File #: 25-840    Version: 1 Name:
Type: Memo Status: Agenda Ready
File created: 9/11/2025 Departments: SUSTAINABILITY
On agenda: 10/7/2025 Final action:
Title: Introduction of an ordinance repealing Chapter 4.100 of Title 4 of the San Mateo County Ordinance Code, Storm Water Management and Discharge Control, and replacing it with Chapter 4.100 Stormwater Pollution Prevention, determining that the ordinance is exempt from the California Environmental Quality Act ("CEQA"), and waive the reading of the ordinance in its entirety.
Attachments: 1. 20251007_io_Stormwater Pollution Prevention Ordinance.pdf
Date Ver.Action ByActionResultAction DetailsMeeting DetailsVideo
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Special Notice / Hearing: None__
Vote Required: Majority

To: Honorable Board of Supervisors
From: Jasneet W. Sharma, Director, Sustainability Department
Subject: Introduction of an Ordinance Repealing Chapter 4.100 of the San Mateo County Ordinance Code, Storm Water Management and Discharge Control, and Replacing it with Chapter 4.100 Stormwater Pollution Prevention

RECOMMENDATION:
title
Introduction of an ordinance repealing Chapter 4.100 of Title 4 of the San Mateo County Ordinance Code, Storm Water Management and Discharge Control, and replacing it with Chapter 4.100 Stormwater Pollution Prevention, determining that the ordinance is exempt from the California Environmental Quality Act ("CEQA"), and waive the reading of the ordinance in its entirety.

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BACKGROUND:
The Stormwater Pollution Prevention Ordinance (Ordinance) applies to unincorporated areas of the county to implement the state-mandated Municipal Regional Stormwater National Pollutant Discharge Elimination System (NPDES) program. The NPDES program protects and enhances water quality by reducing pollutants and eliminating non-stormwater discharges such as fluids, debris and waste into county storm drain systems, watercourses and waterbodies, including creeks, the Bay, and the ocean. As a permittee, the County is subject to a NPDES state program and the permit issued by the San Francisco Bay Regional Water Quality Control Board (Regional Water Board). In addition to NPDES permit provision requirements, the County is mandated by the Regional Water Board to monitor and improve water quality in five watersheds: Pillar Point Harbor and Venice Beach, Pescadero-Butano, San Gregorio, San Vicente Creek, and San Pedro Creek and Pacifica State Beach.

On February 14, 1995, the Board adopted the Storm Water Management and Discharge Control Ordinance (Ordinance No. 3633) providing the authority for the County to implement the federal Clean Water Act in the unincorporated county area....

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