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🌿 Landscaping Rules/Rainwater Harvesting

Rainwater Harvesting: Fillmore vs Simi Valley

How do rainwater harvesting rules compare between Fillmore, CA and Simi Valley, CA?

Fillmore and Simi Valley have similar restriction levels.

Fillmore, CA

Ventura County

Few Restrictions

California law fully supports residential rainwater harvesting. Fillmore residents can collect rainwater from rooftops without a permit for landscape irrigation. Rain barrels and cisterns are encouraged as part of water conservation efforts in the Santa Clara River watershed.

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Simi Valley, CA

Ventura County

Few Restrictions

Rainwater harvesting is legal and encouraged in unincorporated Ventura County under California Water Code Section 10574. No permit is required for residential rain barrels, and the county's watershed protection programs support stormwater capture.

View full Simi Valley rules →

Key Facts Comparison

FactFillmoreSimi Valley
Legal StatusFully legal in California-
PermitNot required for standard rain barrels-
State LawWater Code §10574 / AB 1750-
Large SystemsPermit may be needed > 5,000 galBuilding permit for >5,000 gallons
UseIrrigation only (non-potable)-
Permit Required-No for standard rain barrels
Legal Authority-CA Water Code Section 10574
Mosquito Prevention-Covered/screened containers required
Watershed District-(805) 654-2001

Highlighted rows indicate differences between cities.

Fillmore FAQ

Can I collect rainwater in Fillmore?

Yes. California law explicitly allows rainwater harvesting. You can install rain barrels and cisterns for rooftop runoff collection without a permit for standard residential systems.

Do I need a permit for a rain barrel in Fillmore?

No permit is needed for standard rain barrels. Large cistern systems over 5,000 gallons may need a building permit for structural support. All systems should prevent mosquito breeding with covered or screened openings.

Can I use collected rainwater for drinking in Fillmore?

Collected rainwater should only be used for outdoor irrigation without treatment. Using it for indoor potable purposes requires treatment systems meeting state health standards and may require permitting.

Simi Valley FAQ

Is rainwater harvesting legal in Ventura County?

Yes. California Water Code Section 10574 explicitly authorizes collecting rainwater from rooftop surfaces. No permit is needed for standard residential rain barrels in unincorporated Ventura County.

Do I need a permit for a rain barrel?

Standard residential rain barrels do not require permits. Larger cistern systems exceeding 5,000 gallons may require a building permit to ensure structural safety and proper installation.

What can I use collected rainwater for?

Captured rainwater may be used for landscape irrigation, garden watering, car washing, and other non-potable outdoor uses. Using rainwater for indoor potable purposes requires treatment systems and health department approval.

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