Tustin Water Services utilizes groundwater and imported water to supply domestic water to more than 14,100 service connections through approximately 172 miles of water mains.
The groundwater is pumped from the City's 14 groundwater wells. Imported water from the Colorado River is provided by the Metropolitan Water District of Southern California. Little to no water is provided by way of the State Water Project. Tustin Water Services customers receive a blend of surface and groundwater from these sources.
In 2013 Tustin Water Services supplied over 3.98 billion gallons of water to its customers. The City has multiple storage reservoirs located throughout the service area that allows for the storage of water during low demand periods for use during peak demand periods by Tustin Water Services customers.