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Ventura County, CA Environmental Rules: Erosion Control (2026)

Some Restrictions

Verified 1 month ago|Source: Ventura County Watershed Protection →

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Key Facts

BMPs Required: All soil-disturbing projects
SWPPP: Required for ≥1 acre
Rainy Season: Oct 1 - Apr 15 (heightened)
Enforcement: Watershed Protection District
State Permit: Construction General Permit

City-specific rules exist: Oxnard, Fillmore, Ventura, Thousand Oaks, Port Hueneme, and Camarillo have their own erosion control rules that differ from Ventura County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Summary

Construction projects in unincorporated Ventura County must implement erosion control BMPs. Projects disturbing 1 acre or more require a SWPPP under the state Construction General Permit. Heightened requirements apply during the rainy season.

Full Breakdown

All construction disturbing soil must use erosion control Best Management Practices (BMPs) including silt fences, fiber rolls, and stabilized entrances. Projects over 1 acre require a Stormwater Pollution Prevention Plan (SWPPP). Grading permits from Building & Safety include erosion control requirements. The rainy season (October 1 - April 15) has heightened BMP requirements. The Ventura County Watershed Protection District oversees stormwater compliance.

Violations & Fines

Failure to implement erosion controls may result in stop-work orders and fines. The Regional Water Quality Control Board can impose penalties up to $10,000/day for discharges. Contact Watershed Protection at (805) 654-2001.

Frequently Asked Questions

What erosion controls are required?

Silt fences, fiber rolls, stabilized entrances, and erosion blankets. Projects over 1 acre need a SWPPP. Requirements increase during rainy season (Oct 1-Apr 15).

Do I need a grading permit?

Contact Building & Safety at (805) 654-2797. Grading permits include erosion control requirements.

What if sediment runs off my site?

Sediment discharge can result in fines from the county and the Regional Water Quality Control Board (up to $10,000/day). Implement BMPs before any grading.

How does Ventura County compare?

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Ventura County, CA Environmental Rules: Erosion Control (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

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