Erosion Control: Santa Clara vs Sunnyvale
How do erosion control rules compare between Santa Clara, CA and Sunnyvale, CA?
Sunnyvale has fewer restrictions than Santa Clara.
Santa Clara, CA
Santa Clara County
Santa Clara requires erosion and sediment control plans for grading permits and during the wet season (Oct-Apr) per the Regional Stormwater Permit.
View full Santa Clara rules →Sunnyvale, CA
Santa Clara County
Sunnyvale requires erosion and sediment controls on grading and construction sites under SMC Chapter 18 and the Municipal Regional Stormwater Permit.
View full Sunnyvale rules →Key Facts Comparison
| Fact | Santa Clara | Sunnyvale |
|---|---|---|
| Wet Season | October 1 to April 30 active BMPs required | - |
| 1-Acre Threshold | State CGP and SWPPP required | - |
| Standard BMPs | Silt fence, fiber rolls, covered stockpiles | - |
| Creek Setback | Enhanced BMPs near creek corridors | - |
| Contact | Public Works (408) 615-3000 | - |
| State threshold | - | 1 acre triggers CGP |
| Wet season | - | Oct 1 - Apr 30 |
| Common BMPs | - | Silt fence, fiber rolls, inlet protection |
| Enforcement | - | Stop-work possible |
| Homeowner duty | - | Keep sediment on site |
Highlighted rows indicate differences between cities.
Santa Clara FAQ
When are erosion controls required?
Year-round for disturbed sites, with heightened inspections October through April during the rainy season.
Do I need a SWPPP for a home remodel?
Only if grading exceeds 1 acre; smaller residential projects use standard BMPs prescribed by the building permit.
Sunnyvale FAQ
Do small backyard projects need erosion controls?
Yes. Even small projects must prevent sediment from entering sidewalks, gutters, and storm drains.
What is a winterization plan?
A set of BMPs installed before the wet season to protect exposed soil during storm events.
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