Encinitas, CA Landscaping Rules: Rainwater Harvesting (2026)

California Assembly Bill 1750 (2012) establishes the right of property owners to collect rainwater from rooftops for landscape irrigation without a permit. Encinitas supports rainwater harvesting as part of its stormwater management strategy and water conservation goals. Rain barrels up to approximately 250 gallons typically do not require permits. Larger cistern systems may need building permits depending on structural requirements and connection to plumbing systems. Collected rainwater may be used for landscape irrigation but is not approved for potable use without treatment. Rainwater collection systems must not create standing water that breeds mosquitoes—systems should be sealed or screened. The San Diego County Vector Control Program monitors for mosquito-breeding standing water. Overflow from rain barrels must be directed away from building foundations and not onto neighboring properties. The Olivenhain and San Dieguito water districts may offer rebates for rain barrel purchases. Encinitas's proximity to coastal lagoons makes stormwater management a priority, and rainwater harvesting reduces runoff that carries pollutants into Batiquitos Lagoon, San Elijo Lagoon, and the ocean.