Rainwater Harvesting: Hesperia vs Ontario
How do rainwater harvesting rules compare between Hesperia, CA and Ontario, CA?
Hesperia and Ontario have similar restriction levels.
Hesperia, CA
San Bernardino County
Rainwater harvesting is broadly legal in California under AB 1750 (Rainwater Capture Act of 2012, codified at Water Code §10574). Hesperia has no specific local ordinance regulating residential rain barrels; harvesting from rooftops for non-potable landscape use is allowed without a permit. Larger cisterns or any potable use require state and county health department approval.
View full Hesperia rules →Ontario, CA
San Bernardino County
California's Rainwater Capture Act (AB 1750) lets Ontario residents collect roof rainwater for outdoor use without a permit for simple barrels. Large cisterns and indoor use require plumbing permits.
View full Ontario rules →Key Facts Comparison
| Fact | Hesperia | Ontario |
|---|---|---|
| State Authority | AB 1750 — Cal. Water Code §10574 | - |
| Permit (rain barrels) | Not required for outdoor non-potable use | - |
| Permit (indoor reuse) | Required — CA Plumbing Code Ch. 17 | - |
| Mosquito Control | Must be screened/sealed (HSC §2270) | - |
| Avg Annual Rainfall | ~6-7 inches (High Desert) | - |
| Local Ordinance | None specific in HMC | - |
| State law | - | Rainwater Capture Act (AB 1750) |
| Small barrels | - | Generally no permit |
| Large cisterns | - | Plumbing permit required |
| Indoor use | - | Permit and backflow device |
| Mosquito control | - | Screen all openings |
Highlighted rows indicate differences between cities.
Hesperia FAQ
Can I install rain barrels at my Hesperia home?
Yes. Under the California Rainwater Capture Act (Water Code §10574) and absent any local prohibition in Hesperia's code, rain barrels for outdoor landscape use are allowed without a permit. They must be screened to prevent mosquito breeding.
Do I need a permit to harvest rainwater in Hesperia?
No permit is required for residential rooftop systems used for outdoor non-potable irrigation. Indoor use (toilet flushing, laundry) requires a city building permit and California Plumbing Code Chapter 17 compliance.
Ontario FAQ
Do I need a permit for a 55-gallon rain barrel in Ontario?
Typically no, if it is above-ground, gravity-fed, screened against mosquitoes, and used only for outdoor irrigation.
Can I plumb rainwater to flush my toilets?
Yes, but only with a plumbing permit, a licensed contractor, Appendix K-compliant treatment, and approved backflow prevention.
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