Rainwater harvesting is legal and encouraged in California. AB 1750 (2012) explicitly allows residential rainwater collection systems. Tuolumne County does not require permits for standard rain barrel installations.
California AB 1750 (2012) explicitly authorizes residential rainwater capture and use for non-potable purposes. Tuolumne County does not restrict rainwater harvesting on residential properties. Standard rain barrel systems (typically 50-500 gallons) do not require permits. Larger cistern systems may require building permits depending on size and structural considerations. The county's Sierra foothill climate receives approximately 30-40 inches of annual precipitation, making rainwater harvesting viable during the wet season (October-April). Collected water can be used for irrigation, which helps reduce demand on local water systems during dry summer months.
No violations for standard rainwater collection. Large cisterns may need building permits if they involve structural work.
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Side-by-side rule comparisons with other cities in Tuolumne County.
See how Twain Harte's rainwater harvesting rules stack up against other locations.
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