Rainwater Harvesting: El Monte vs South Gate
How do rainwater harvesting rules compare between El Monte, CA and South Gate, CA?
El Monte and South Gate have similar restriction levels.
El Monte, CA
Los Angeles County
California law (Rainwater Capture Act of 2012, AB 1750) allows residential rainwater harvesting from rooftops without a state water-rights permit. El Monte does not restrict residential rain barrels and Chapter 13.16 (Stormwater) plus the city's LID (Low Impact Development) standards actively encourage onsite rainwater capture.
View full El Monte rules →South Gate, CA
Los Angeles County
South Gate has no local ordinance restricting residential rainwater harvesting. California Water Code § 10574 (Rainwater Capture Act of 2012) expressly authorizes capture of rainwater from rooftops for non-potable use without a water-right permit. Tanks remain subject to Title 24 building/plumbing standards and Ch. 9.48 nuisance rules for safety, anchoring, and overflow.
View full South Gate rules →Key Facts Comparison
| Fact | El Monte | South Gate |
|---|---|---|
| Residential rain barrels | Allowed without permit | - |
| State authority | Cal. Water Code §10573 (AB 1750, 2012) | Cal. Water Code § 10574 (Rainwater Capture Act, AB 1750) |
| City code | EMMC Chapter 13.16 Stormwater + LID ordinance | - |
| Large cisterns | Plumbing permit per CPC Ch. 17 | - |
| Permit required | - | Not for outdoor/non-potable use; building permit for plumbed systems or large tanks |
| Local code | - | Title 24 enforced via South Gate Municipal Code Ch. 9.02 |
Highlighted rows indicate differences between cities.
El Monte FAQ
Can I install a rain barrel without a permit?
Yes. Residential rooftop rain barrels and similar small rainwater catchment for landscape irrigation are allowed without a city permit and without a state water-rights permit under California Water Code §10573.
Does El Monte require new homes to capture stormwater?
Yes for projects subject to the city's Low Impact Development standards under EMMC Chapter 13.16, which were adopted to comply with the Los Angeles MS4 permit and require onsite retention through rainfall harvest, infiltration, or biofiltration.
South Gate FAQ
Do I need a permit for a 50-gallon rain barrel?
No state water-right permit and typically no building permit for small outdoor barrels. Larger cisterns or any plumbing into the house require a permit through South Gate Building Division.
Can I drink harvested rainwater?
The Rainwater Capture Act authorizes non-potable use. Potable use requires Title 24 plumbing compliance and treatment.
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