Stormwater Management: Hayward vs Livermore
How do stormwater management rules compare between Hayward, CA and Livermore, CA?
Hayward and Livermore 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 →Livermore, CA
Alameda County
Livermore is a Bay Area MRP 3.0 permittee; new/redevelopment projects 10,000+ sq ft must implement C.3 Low Impact Development stormwater treatment.
View full Livermore rules →Key Facts Comparison
| Fact | Hayward | Livermore |
|---|---|---|
| C.3 threshold | 2,500 sf impervious | - |
| Full C.3 | Over 10,000 sf | - |
| Wet season | Oct 1 - Apr 30 | - |
| Illicit discharge | Prohibited NPDES | - |
| MRP Permit | SF Bay RWQCB | - |
| Permit | - | MRP 3.0 NPDES |
| Threshold | - | 10,000 sq ft triggers C.3 |
| Flood Agency | - | Zone 7 Water |
| Code | - | LMC Ch. 13.38 |
| Discharge Penalty | - | $1K-10K/day |
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.
Livermore FAQ
Can I wash my car in the driveway?
Residential occasional washing is typically allowed, but runoff must not carry soap to storm drains — use biodegradable products or a car wash.
What's C.3?
C.3 is the MRP provision requiring LID stormwater treatment on new/redevelopment projects creating 10,000+ sq ft impervious area.
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