Stormwater Management: Hayward vs San Leandro
How do stormwater management rules compare between Hayward, CA and San Leandro, CA?
Hayward and San Leandro have similar restriction levels.
Hayward, CA
Alameda County
Hayward enforces the Countywide C.3 stormwater requirements for projects creating 2,500 square feet of impervious area. Illicit discharges to storm drains are prohibited under the NPDES MS4 permit.
View full Hayward rules →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 →Key Facts Comparison
| Fact | Hayward | San Leandro |
|---|---|---|
| C.3 threshold | 2,500 sf impervious | 2,500 sq ft impervious |
| Full C.3 | Over 10,000 sf | - |
| Wet season | Oct 1 - Apr 30 | - |
| Illicit discharge | Prohibited NPDES | Up to $10,000/day |
| MRP Permit | SF Bay RWQCB | - |
| Regulator | - | SF Bay RWQCB MRP |
| Hydromod | - | Over 10,000 sq ft |
| Local code | - | SLMC Title 7 |
Highlighted rows indicate differences between cities.
Hayward FAQ
Can I drain my pool to the street?
Only after dechlorinating and at a slow rate to prevent erosion; chlorinated water is an illicit discharge.
Do small remodels need stormwater features?
Projects under 2,500 sf of new impervious area typically do not trigger C.3, but erosion controls still apply.
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.
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