Stormwater Management: Anaheim vs Irvine
How do stormwater management rules compare between Anaheim, CA and Irvine, CA?
Anaheim has fewer restrictions than Irvine.
Anaheim, CA
Orange County
Anaheim participates in the North Orange County stormwater program under the MS4 permit regulated by the Santa Ana Regional Water Quality Control Board. New development must incorporate stormwater BMPs.
View full Anaheim rules →Irvine, CA
Orange County
Irvine enforces stormwater quality regulations under the Santa Ana Regional Water Quality Control Board MS4 permit. The city requires Water Quality Management Plans (WQMPs) for new development and redevelopment projects incorporating Low Impact Development (LID) principles. Construction sites must prepare Stormwater Pollution Prevention Plans. The city's stormwater program protects San Diego Creek, Upper Newport Bay, and other receiving waters in the Newport Coast watershed.
View full Irvine rules →Key Facts Comparison
| Fact | Anaheim | Irvine |
|---|---|---|
| Permit | North OC MS4 | - |
| WQMP | Required for new dev | - |
| Board | Santa Ana RWQCB | - |
| Watershed | Santa Ana River | - |
| Permit Authority | - | Santa Ana RWQCB MS4 permit |
| WQMP Required | - | For new development and redevelopment |
| LID Standards | - | Required for all qualifying projects |
| Receiving Waters | - | San Diego Creek, Upper Newport Bay |
| Construction | - | SWPPP required for 1+ acre disturbance |
Highlighted rows indicate differences between cities.
Anaheim FAQ
What stormwater permits does Anaheim require?
New development must prepare a WQMP with stormwater BMPs. The city operates under the North OC MS4 permit from the Santa Ana Regional Water Quality Control Board.
Can I wash my car and let water run to the storm drain?
No. Only rainwater should enter storm drains. Wash cars on permeable surfaces or at commercial car washes that recycle water.
Irvine FAQ
Who manages stormwater in Irvine?
The City of Irvine manages stormwater under the Santa Ana Regional Water Quality Control Board MS4 permit. The Public Works Department enforces water quality requirements to protect San Diego Creek and Upper Newport Bay.
What is a WQMP in Irvine?
A Water Quality Management Plan is required for new development and redevelopment. It must incorporate LID principles such as bioretention, permeable surfaces, and infiltration to treat stormwater before discharge.
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