San Joaquin County, CA Environmental Rules: Stormwater Management (2026)
Key Facts
- Coverage area
- County Service Area 54
- Enforcer
- Director of Public Works
- Prohibits
- NPDES permit violations
- Applies to
- Unincorporated area only
Summary
County ordinance bars discharging pollutants into the storm drainage system and requires compliance with the County's federal Clean Water Act NPDES permit.
No person shall permit or cause the discharge of any wastewater, pollutant, substance or material of any kind into the County storm drainage system which interferes with the operation or performance of the County storm drainage system or which violates any condition of the County NPDES Permit or any other Federal, State, or local regulation.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Development Title: Supplement 3 | Code of Ordinances: Supplement 80 Update 2).
Full Breakdown
San Joaquin County Code §5-10001 et seq. establishes the County Storm Water Management and Discharge Control Ordinance to meet Clean Water Act requirements. Section 5-10101 makes it unlawful for anyone to discharge wastewater, pollutants or other material into the County storm drainage system in a way that interferes with its operation or violates the County's NPDES permit or other federal, state or local law. The ordinance applies within County Service Area No. 54, covering catch basins, gutters, ditches and flood-control channels, and is enforced by the Director of Public Works as the authorized enforcement officer.
Violations & Fines
Unlawful discharges that violate the NPDES permit are enforced by the Director of Public Works; violators face administrative, civil and criminal penalties (§5-10107).
Frequently Asked Questions
Does San Joaquin County regulate storm water drainage?
Who enforces the county's storm water rules?
Sources & Official References
Other rules in San Joaquin County
California rules heatmap·Compare San Joaquin County to another location·View the California environmental rules overview
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