Stormwater Management: Los Angeles vs Santa Monica
How do stormwater management rules compare between Los Angeles, CA and Santa Monica, CA?
Los Angeles and Santa Monica have similar restriction levels.
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 →Santa Monica, CA
Los Angeles County
Santa Monica operates a stormwater utility under the municipal code with user fees on all parcels. The city promotes runoff conservation and sustainable management for water sustainability. LID and stormwater harvesting are strongly encouraged.
View full Santa Monica rules →Key Facts Comparison
| Fact | Los Angeles | Santa Monica |
|---|---|---|
| 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 | - |
| Stormwater Utility | - | User fee on all parcels |
| Runoff Conservation | - | SMMC Ch. 7.10 |
| LID | - | Encouraged for all development |
| Water Sustainability | - | Rainwater/stormwater reuse promoted |
Highlighted rows indicate differences between cities.
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.
Santa Monica 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 Santa Monica public works.
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