Rainwater Harvesting: Hesperia vs Rialto
How do rainwater harvesting rules compare between Hesperia, CA and Rialto, CA?
Hesperia and Rialto 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 →Rialto, CA
San Bernardino County
Rainwater capture is legal and encouraged in California under the Rainwater Capture Act of 2012 (AB 1750). Rialto requires no permit for rain barrels up to 5,000 gallons used outdoors. Larger cisterns and any indoor/potable use require plumbing permits and backflow protection per the California Plumbing Code.
View full Rialto rules →Key Facts Comparison
| Fact | Hesperia | Rialto |
|---|---|---|
| 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 | - |
| Rain Barrel ≤360 gal | - | No permit required |
| Cistern >360 gal | - | Plumbing permit required |
| State Law | - | Water Code §10573 (AB 1750) |
| Code | - | CPC Ch. 15 / Ch. 17 |
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.
Rialto FAQ
Do I need a permit for a rain barrel in Rialto?
No. Rain barrels up to 360 gallons (or up to 5,000 gallons of aggregate storage in some readings of CPC 1502.4) used for outdoor irrigation only do not require a permit. Larger systems or any indoor connection require a Building Safety Division permit.
Can I harvest rainwater to drink?
Potable use of harvested rainwater is not permitted under the California Plumbing Code without an engineered treatment system and Health Department approval. Stick to landscape irrigation and toilet flushing (with dual piping).
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