San Joaquin County, CA Environmental Rules: Erosion Control (2026)
Key Facts
- SWPPP due
- Before building permit/final map
- Applies to
- Developers, contractors
- Standard used
- State Water Board BMPs
- Enforced by
- Public Works Director
Summary
Developers and contractors must submit a Storm Water Pollution Prevention Plan before getting a building permit or final map approval in unincorporated San Joaquin County.
The Director may adopt regulations establishing controls (I) on the volume and rate of storm water runoff for each industrial discharger, discharger associated with construction activity, or other discharger, described in any general Storm Water Permit addressing such discharges, as may be adopted by the United States Environmental Protection Agency, the State Water Resources Control Board, or the California Regional Water Quality Control Board, Central Valley Region, or (II) for discharges from new developments and redevelopments as may be appropriate to minimize the discharge and transport of pollutants. The Director may require any developer or construction contractor performing work in the County to submit a Storm Water Pollution Prevention Plan prior to final map approval by the County or prior to issuance of a building permit by the County, whichever first occurs.
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
County Code §5-10110(a) lets the Director of Public Works require any developer or construction contractor to submit a Storm Water Pollution Prevention Plan (SWPPP) prior to final map approval or building permit issuance, whichever comes first. The Director may also adopt controls on runoff volume and rate tied to State Water Resources Control Board and Central Valley Regional Water Quality Control Board general construction and industrial storm water permits. Anyone required to file an NOI for a general Storm Water Permit must give the Director a copy of the application, permit and SWPPP.
Violations & Fines
Enforced by the Director of Public Works; a missing SWPPP can hold up final map recordation or building permit issuance until one is filed (§5-10110).
Frequently Asked Questions
Does San Joaquin County require an erosion-control plan for construction?
Who reviews the SWPPP?
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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