Galt, CA Landscaping Rules: Rainwater Harvesting (2026)

The California Rainwater Capture Act of 2012 (AB 1750) and Water Code Sections 10574-10574.5 affirm the right of property owners to collect rainwater from rooftops without securing a water right from the State Water Resources Control Board, provided use is on the same property. Simple rain barrels connected to downspouts, typically 50 to 100 gallons, are allowed in Galt without a building permit. Larger cisterns, pumped systems, or any system providing water intended for indoor non-potable use such as toilet flushing require a plumbing permit with cross-connection protections meeting the California Plumbing Code, including approved backflow devices if any makeup water from the City supply is involved. Potable reuse of rainwater is generally not permitted for single-family homes. Harvested rainwater should be screened to prevent mosquito breeding, and barrels must be covered. Greywater laundry-to-landscape systems are separately authorized under California Plumbing Code Chapter 15 without a permit if installed per state rules.