Fullerton, CA Landscaping Rules: Water Restrictions (2026)

Water service in Fullerton is provided by the city's Water Division within the Public Works Department. Fullerton draws from a combination of local groundwater (Orange County Water District basin) and imported water from the Metropolitan Water District of Southern California. Outdoor irrigation restrictions are implemented through a staged water conservation ordinance that activates based on supply conditions and state mandates. Under standard conservation measures, residential landscape irrigation is permitted on assigned days (typically two to three days per week based on address, with odd-numbered addresses watering on certain days and even-numbered on others). Irrigation is prohibited between 9:00 AM and 5:00 PM to minimize evaporation. Each irrigation station is limited to a maximum run time (typically 10 to 15 minutes per station per day). Runoff from irrigation onto sidewalks, driveways, streets, and gutters is prohibited at all times regardless of conservation stage. Washing down hardscapes (driveways, patios, sidewalks) with potable water is prohibited; residents must use a broom or blower. During drought emergencies, the city may implement enhanced restrictions including reduced watering days or a total outdoor irrigation ban for non-established landscaping. The state's permanent water conservation regulations (California Water Code Section 10608 et seq.) prohibit certain wasteful water practices year-round, including irrigating within 48 hours of measurable rainfall and using non-recirculating water features. Fullerton offers water conservation rebates through the Municipal Water District of Orange County for turf removal, smart irrigation controllers, and high-efficiency fixtures.