Rainwater Harvesting: Rancho Cucamonga vs Rialto
How do rainwater harvesting rules compare between Rancho Cucamonga, CA and Rialto, CA?
Rancho Cucamonga and Rialto have similar restriction levels.
Rancho Cucamonga, CA
San Bernardino County
Rainwater harvesting for landscape irrigation is legal and encouraged in Rancho Cucamonga. CVWD and MWC offer rebates, and systems over 5,000 gallons or potable use require permits.
View full Rancho Cucamonga 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 | Rancho Cucamonga | Rialto |
|---|---|---|
| Rain barrels | Allowed without permit for roof runoff | - |
| Large systems | Permit required over approximately 5,000 gallons | - |
| Use restriction | Non-potable landscape irrigation only | - |
| Greywater | Laundry-to-landscape exempt under CPC Chapter 16 | - |
| Rebates | CVWD periodic rain barrel rebate programs | - |
| 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.
Rancho Cucamonga FAQ
Can I install a rain barrel in Rancho Cucamonga?
Yes. Simple rain barrels under 5,000 gallons for landscape irrigation do not require a permit and may qualify for CVWD rebates.
Can I drink harvested rainwater?
No. California allows rainwater for non-potable uses only unless a complex treatment and backflow system is permitted.
Can my HOA ban my rain barrel?
No. California Civil Code 4735 prohibits HOAs from banning water conservation landscaping and reasonable rain capture devices, though they can regulate appearance.
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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