Stormwater Management: Oakley vs San Ramon
How do stormwater management rules compare between Oakley, CA and San Ramon, CA?
Oakley has fewer restrictions than San Ramon.
Oakley, CA
Contra Costa County
Oakley is covered under the Contra Costa County Municipal Regional Stormwater Permit (MRP). Property owners must prevent pollutants from entering storm drains. Illicit discharges (chemicals, paint, soaps into drains) are prohibited. New development above certain thresholds must implement post-construction Low Impact Development (LID) stormwater management.
View full Oakley rules →San Ramon, CA
Contra Costa County
San Ramon prohibits illicit discharges to its storm drain system under the Municipal Regional Stormwater Permit (MRP) and local ordinance. Illicit discharges include any non-stormwater entering the MS4 — wastewater, wash water, chemicals, paint, oil, sediment, and pool water. Violations carry fines up to $10,000 per day under California Water Code Section 13385 and local penalties. Reporting is encouraged through the Contra Costa Clean Water Program or San Ramon Public Services.
View full San Ramon rules →Key Facts Comparison
| Fact | Oakley | San Ramon |
|---|---|---|
| Permit | Contra Costa County MRP stormwater permit | - |
| Illicit Discharge | Prohibited — no chemicals/paint/soaps into storm drains | - |
| New Development | LID post-construction stormwater management required | - |
| Reporting | Oakley Code Enforcement (925) 625-7031 | - |
| - | - |
Highlighted rows indicate differences between cities.
Oakley FAQ
Do I need a stormwater plan for my project?
Generally required for new construction and major renovations that increase impervious surface area. Small residential projects may be exempt.
What is an illicit discharge?
Any non-stormwater substance entering the storm drain system, including paint, oil, chemicals, or sediment. Report violations to Oakley public works.
San Ramon FAQ
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