Erosion Control: Altadena vs Compton
How do erosion control rules compare between Altadena, CA and Compton, CA?
Altadena and Compton have similar restriction levels.
Altadena, CA
Los Angeles County
All grading and disturbed sites in Altadena must implement erosion controls under LA County Building Code Title 26 Appendix J and the County's MS4 permit. Rainy-season grading (Oct 15 – Apr 15) requires Best Management Practices approved by Public Works.
View full Altadena rules →Compton, CA
Los Angeles County
Construction projects in Compton disturbing soil must comply with NPDES stormwater permits and implement BMPs for erosion control. Projects over 1 acre require a SWPPP under the state Construction General Permit. LA County Flood Control District standards apply.
View full Compton rules →Key Facts Comparison
| Fact | Altadena | Compton |
|---|---|---|
| Code Section | LA County Title 26 App. J + CSD 22.306.060.B.3.b | - |
| Rainy Season | Oct 15 – Apr 15 | - |
| BMPs Required | Silt fences, fiber rolls, hydroseed | - |
| SWPPP | - | Required for sites over 1 acre |
| BMPs | - | Silt fences, fiber rolls, etc. |
| Oversight | - | LA Regional Water Quality Board |
| Grading Permit | - | Required for significant earthwork |
Highlighted rows indicate differences between cities.
Altadena FAQ
Do I need erosion controls during winter construction in Altadena?
Yes — rainy-season grading (Oct 15 to Apr 15) must implement Public Works–approved BMPs per Altadena CSD 22.306.060.B.3.b.
Compton FAQ
Do I need erosion control for a small project?
Most jurisdictions require erosion control for any ground disturbance over 500 to 1,000 square feet. Check Compton grading permit requirements.
Who inspects erosion controls?
Compton building or public works department inspects during active construction. Federal EPA NPDES permits may also apply for sites over one acre.
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