Trabuco Canyon Water District provides water to a population of approximately 13,659 throughout its 8,200 acre service area. It covers portions of the City of Rancho Santa Margarita, City of Lake Forest, City of Mission Viejo, Trabuco Canyon and other areas of unincorporated Orange County.

The District receives its water from several sources, including local groundwater from Trabuco Creek and imported water from the Metropolitan Water District of Southern California (MET) through the Municipal Water District of Orange County (MWDOC). The majority of the District’s imported water is untreated surface water from the Colorado River which is filtered and treated at the Dimension Water Treatment Plant. The District's local groundwater is treated at the Trabuco Creek Groundwater Treatment Facility in the heart of the canyon, and the treated water is imported from the Diemer Filtration Plant operated by MET.

To distribute the treated water throughout the distribution system, the District has eight pump stations, seven treated water storage reservoirs, and approximately 66 miles of pipelines. The District also has the capability to transfer and exchange water to and from the District with neighboring districts, including Irvine Ranch Water District (IRWD), Santa Margarita Water District (SMWD), and El Toro Water District (ETWD). This water can be transferred or exchanged to and other districts for short durations such as emergencies or water transmission line breaks. 

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