Garden Grove, CA Landscaping Rules: Rainwater Harvesting (2026)
Key Facts
- Legal in California
- Yes, under Water Code 10574
- Permit Threshold
- Not needed under 5,000 gallons
- Use
- Outdoor irrigation only (untreated)
- Rebates Available
- $35-$75 per rain barrel
- Mosquito Screen
- Required on all containers
Summary
Garden Grove permits residential rainwater harvesting consistent with California law (Water Code Section 10574). Homeowners may collect rainwater from rooftops using rain barrels and cisterns without a permit for containers under 5,000 gallons. The Metropolitan Water District and city offer rebates for rain barrel installation as part of water conservation programs.
Water Code - WAT DIVISION 6. CONSERVATION, DEVELOPMENT, AND UTILIZATION OF STATE WATER RESOURCES [10000 - 12999] ( Heading of Division 6 amended by Stats. 1957, Ch. 1932. ) PART 2.4. Rainwater Capture Act of 2012 [10570 - 10574] ( Part 2.4 added by Stats. 2012, Ch. 537, Sec. 2. ) 10574. Use of rainwater collected from rooftops does not require a water right permit pursuant to Section 1201. (Added by Stats. 2012, Ch. 537, Sec. 2. (AB 1750) Effective January 1, 2013.)
Full Breakdown
California Water Code Section 10574, the Rainwater Capture Act of 2012, allows residential rainwater harvesting statewide without a water right permit. Garden Grove residents may install rain barrels and cisterns to collect rooftop runoff for landscape irrigation. Containers under 5,000 gallons typically do not require a building permit, though placement must comply with setback requirements. Collected rainwater should be used for outdoor irrigation only, not for drinking water without treatment. The Metropolitan Water District of Southern California and the Municipal Water District of Orange County offer rebates ranging from $35 to $75 per rain barrel. Garden Grove encourages rainwater harvesting as part of its compliance with state water conservation mandates. Rain barrels should include mosquito screening to prevent breeding. Containers must not create pooling or drainage problems on neighboring properties.
Violations & Fines
Rainwater collection is legal in California. However, containers that create mosquito breeding, drainage problems, or violate setback requirements may face code enforcement action. Contact Community Development at (714) 741-5312.
Frequently Asked Questions
Is it legal to collect rainwater in Garden Grove?
Do I need a permit for a rain barrel in Garden Grove?
Are there rebates for rain barrels in Garden Grove?
Sources & Official References
Other rules in Garden Grove
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Rainwater Harvesting in Nearby Cities
How other cities in Orange County handle rainwater harvesting.