Stormwater Management: Corona vs Riverside
How do stormwater management rules compare between Corona, CA and Riverside, CA?
Corona and Riverside have similar restriction levels.
Corona, CA
Riverside County
Corona regulates stormwater discharge under Municipal Code Chapter 13.32 and the Santa Ana Regional Water Quality Control Board MS4 Permit. Property owners and contractors must prevent pollutants from entering the storm drain system, which discharges to Temescal Wash and ultimately the Santa Ana River.
View full Corona rules →Riverside, CA
Riverside County
Riverside is a co-permittee under the Santa Ana Region MS4 NPDES permit; only rainwater may enter storm drains, illicit discharges are prohibited, and new/redevelopment projects must submit a Water Quality Management Plan (WQMP) with Low Impact Development (LID) BMPs.
View full Riverside rules →Key Facts Comparison
| Fact | Corona | Riverside |
|---|---|---|
| - | - | |
| Permit type | - | Santa Ana Region MS4 NPDES (Order R8-2010-0033) |
| Receiving water | - | Santa Ana River watershed |
| WQMP required | - | New development and significant redevelopment |
| Design standard | - | Low Impact Development (LID) — infiltrate, harvest, ET, or bio-treat |
| Administering department | - | Public Works Engineering Stormwater Division |
Highlighted rows indicate differences between cities.
Corona FAQ
Riverside FAQ
Do I need a Water Quality Management Plan for a home remodel in Riverside?
Single-family remodels generally do not trigger WQMP requirements, but any project that disturbs soil must still install construction-phase erosion and sediment controls. Larger projects creating significant impervious area must submit a project-specific WQMP before discretionary approval. Check with Public Works Engineering at (951) 826-5341.
Can I wash my car in the driveway in Riverside?
The city discourages driveway car washing because soapy runoff flows untreated into storm drains and ultimately the Santa Ana River. Use a commercial car wash that recycles water, or wash on grass/gravel so runoff infiltrates.
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