Moorpark, CA Landscaping Rules: Rainwater Harvesting (2026)
Key Facts
- Legal Status
- Legal under CA law (AB 1750)
- Small Barrels
- No permit required
- Large Cisterns
- May need plumbing permit
- Potable Use
- Not permitted without treatment
- Rebates
- May be available through water district
Summary
Rainwater harvesting is legal and encouraged in Moorpark under California state law (AB 1750, 2012). Residential rain barrels and cisterns do not require permits for containers up to standard residential sizes. The city's stormwater management program encourages onsite water retention. Larger systems may need a plumbing permit.
AB 1750, Solorio. Rainwater Capture Act of 2012. ... This bill would enact the Rainwater Capture Act of 2012, which would provide that use of rainwater collected from rooftops does not require a water right permit from the state board. ... This bill would additionally authorize a landscape contractor working within the classification of his or her license to enter into a prime contract for the construction of a rainwater capture system, as defined, if the system is used exclusively for landscape irrigation or as a water supply for a fountain, pond, or similar decorative water feature in a landscaping project.
Full Breakdown
California law explicitly permits rainwater harvesting for residential use. AB 1750 (2012) established that no permit is required for small-scale residential rainwater harvesting systems. Standard rain barrels (typically 50-100 gallons) can be installed without city permits. Larger cistern systems may require a plumbing permit if connected to household plumbing. The city's stormwater quality management program under MMC Chapter 15.24 encourages onsite retention of stormwater, making rain barrels a complementary practice. Collected rainwater can be used for landscape irrigation. The Ventura County Waterworks District may offer rebates for rain barrel purchases as part of water conservation programs. Water quality regulations prohibit using harvested rainwater for potable purposes without treatment.
Violations & Fines
Small residential rain barrels are not subject to enforcement. Large cisterns connected to plumbing without permits may need retroactive permitting. Systems that create standing water attracting mosquitoes may violate §8.48.020(Q). Contact Building and Safety at (805) 517-6272 for large systems.
Frequently Asked Questions
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Sources & Official References
Other rules in Moorpark
California rules heatmap·Compare Moorpark to another location·View the California landscaping rules overview
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Rainwater Harvesting in Nearby Cities
How other cities in Ventura County handle rainwater harvesting.