Stormwater Management: San Leandro vs Sunol
How do stormwater management rules compare between San Leandro, CA and Sunol, CA?
San Leandro and Sunol have similar restriction levels.
San Leandro, CA
Alameda County
San Leandro is co-permittee under Bay Area Municipal Regional Stormwater NPDES Permit. C.3 treatment required for projects creating 2,500+ sq ft impervious.
View full San Leandro rules →Sunol, CA
Alameda County
Alameda County complies with SF Bay Regional Water Board MRP 3.0. Projects disturbing 10,000 sf or more must incorporate Low Impact Development treatment per Provision C.3.
View full Sunol rules →Key Facts Comparison
| Fact | San Leandro | Sunol |
|---|---|---|
| Regulator | SF Bay RWQCB MRP | - |
| C.3 threshold | 2,500 sq ft impervious | 10,000 sf impervious |
| Hydromod | Over 10,000 sq ft | - |
| Illicit discharge | Up to $10,000/day | - |
| Local code | SLMC Title 7 | - |
| Permit | - | MRP 3.0 (SF Bay Water Board) |
| Single-family | - | 2,500 sf reduced threshold |
| Hydromodification | - | Over 1 acre |
| Local agency | - | Alameda Clean Water Program |
Highlighted rows indicate differences between cities.
San Leandro FAQ
Can I wash my car in the driveway?
Use biodegradable soap and minimize runoff. Commercial car washes are preferred since they capture wastewater.
What is C.3?
Provision C.3 of the Bay Area Stormwater Permit requires on-site treatment of stormwater for projects meeting impervious area thresholds.
Sunol FAQ
Do I need stormwater treatment for my home addition?
Only if the project creates or replaces 2,500 square feet or more of impervious surface on single-family lots. Most small additions fall below this threshold but still must avoid illicit discharges.
Can I wash my car in the driveway?
Soapy runoff to storm drains is an illicit discharge. Use commercial car washes that recycle water or wash on gravel or lawn where runoff soaks in rather than entering the street.
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