Stormwater Management: Altadena vs Compton
How do stormwater management rules compare between Altadena, CA and Compton, CA?
Altadena and Compton have similar restriction levels.
Altadena, CA
Los Angeles County
LA County operates under a regional MS4 permit issued by the LA Regional Water Quality Control Board. LA County Code Title 12 prohibits discharging non-stormwater (sediment, chemicals, paint, sewage, washwater) into storm drains.
View full Altadena rules →Compton, CA
Los Angeles County
Compton is within the LA County MS4 NPDES permit area. All development must comply with Low Impact Development (LID) standards. Stormwater runoff must be managed on-site where feasible. The LA County Flood Control District oversees regional stormwater infrastructure.
View full Compton rules →Key Facts Comparison
| Fact | Altadena | Compton |
|---|---|---|
| Authority | LA County Code Title 12 + State Water Board MS4 | - |
| Construction SWPPP | Required ≥1 acre disturbance | - |
| Illicit Discharge Hotline | (888) CLEAN-LA | - |
| MS4 Permit | - | LA County NPDES |
| LID Required | - | For new/redevelopment |
| Regional System | - | LA County Flood Control District |
| BMPs | - | Required for construction and operations |
Highlighted rows indicate differences between cities.
Altadena FAQ
Can I hose my driveway into the gutter in Altadena?
Generally no — soapy or sediment-laden runoff into the storm drain violates the LA County NPDES MS4 permit and Title 12.
Compton FAQ
Do I need a stormwater plan for my project?
Generally required for new construction and major renovations that increase impervious surface area. Small residential projects may be exempt.
What is an illicit discharge?
Any non-stormwater substance entering the storm drain system, including paint, oil, chemicals, or sediment. Report violations to Compton public works.
Compare other topics
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