Stormwater Management: El Monte vs Los Angeles
How do stormwater management rules compare between El Monte, CA and Los Angeles, CA?
El Monte has fewer restrictions than Los Angeles.
El Monte, CA
Los Angeles County
El Monte is developing a Stormwater Urban Master Plan to improve water quality. The city participates in the LA County MS4 NPDES permit. New development must implement BMPs. Report illicit discharges to Public Works at (626) 580-2250.
View full El Monte rules →Los Angeles, CA
Los Angeles County
LAMC 64.72 (LID Ordinance, Ord. 183833) requires new development to manage stormwater runoff on-site through infiltration, bioretention, or capture systems. Priority projects must meet MS4 permit standards using the Development BMP Handbook. Projects disturbing 1+ acres need a state SWPPP. Grading permits are conditioned on stormwater compliance and a recorded covenant.
View full Los Angeles rules →Key Facts Comparison
| Fact | El Monte | Los Angeles |
|---|---|---|
| Permit | LA County MS4 NPDES | - |
| Master Plan | Stormwater Urban Master Plan | - |
| Report | Public Works (626) 580-2250 | - |
| BMPs | Required for new development | - |
| Code Section | - | LAMC 64.72 (LID Ordinance) |
| Requirement | - | On-site stormwater management |
| Hierarchy | - | Infiltration > bioretention > treatment |
| 1+ Acre Sites | - | State SWPPP required |
| Covenant | - | Recorded BMP maintenance agreement |
Highlighted rows indicate differences between cities.
El Monte 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 El Monte public works.
Los Angeles 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 Los Angeles public works.
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