Erosion Control: Altadena vs Santa Clarita
How do erosion control rules compare between Altadena, CA and Santa Clarita, CA?
Altadena and Santa Clarita 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 →Santa Clarita, CA
Los Angeles County
Hillside development in Santa Clarita requires erosion control measures per SCMC 17.51. The city regulates grading to minimize adverse hillside impacts.
View full Santa Clarita rules →Key Facts Comparison
| Fact | Altadena | Santa Clarita |
|---|---|---|
| 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 | - |
| Hillside Code | - | SCMC 17.51 (hillside development) |
| NPDES | - | Stormwater compliance required |
| SWPPP | - | Required for sites over 1 acre |
| Grading Permit | - | Erosion plan 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.
Santa Clarita 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 Santa Clarita grading permit requirements.
Who inspects erosion controls?
Santa Clarita building or public works department inspects during active construction. Federal EPA NPDES permits may also apply for sites over one acre.
Compare other topics
See how Altadena and Santa Clarita compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool