Erosion Control: Altadena vs Pasadena
How do erosion control rules compare between Altadena, CA and Pasadena, CA?
Altadena has fewer restrictions than Pasadena.
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 →Pasadena, CA
Los Angeles County
Pasadena requires erosion control measures for all construction and grading activities per Title 14 Building Code. BMPs must prevent sediment discharge. Properties near natural watercourses must protect bank vegetation under PMC 8.70.100.
View full Pasadena rules →Key Facts Comparison
| Fact | Altadena | Pasadena |
|---|---|---|
| Code Section | LA County Title 26 App. J + CSD 22.306.060.B.3.b | PMC 8.70.100 |
| Rainy Season | Oct 15 – Apr 15 | - |
| BMPs Required | Silt fences, fiber rolls, hydroseed | - |
| BMPs | - | Required during construction |
| Watercourses | - | Bank vegetation protected |
| NPDES | - | Compliance required |
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.
Pasadena 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 Pasadena grading permit requirements.
Who inspects erosion controls?
Pasadena 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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