Orange County Water Department

Find Orange County California water departments, districts, authorities, boards, and services. Water departments provide information on drinking water, treatment plants, sewage treatment, water conservation, and testing.


Fountain Valley Water Department 10200 Slater Avenue Fountain Valley CA 92708 714-593-4420


Fullerton Water Department 1580 West Commonwealth Avenue Fullerton CA 92833 714-738-6897

Garden Grove Water Department 13802 Newhope Street Garden Grove CA 92843 714-741-5395

La Habra City Water Department 201 East La Habra Boulevard La Habra CA 90631 562-905-9731

Orange County Water Department 600 Shellmaker Road Newport Beach CA 92660 949-219-0423

Orange Water Department 189 South Water Street Orange CA 92866 714-288-2500

San Clemente Water Department 100 Avenida Presidio San Clemente CA 92672 949-361-8315

Tustin Water Department 300 Centennial Way Tustin CA 92780 714-573-3075

About Orange County Water Departments

The Orange County Water Department or Water Utility is a government agency or private company that operates a public water system, which provides potable tap water directly to residential, commercial, industrial, and institutional customers in Orange County, CA.

You may contact the Water Department for questions about:
  • Water utility bills and payments
  • Orange County drinking water
  • Drinking water quality testing and safety
  • Water treatment facilities in Orange County, CA
Orange County Water Utility Companies

Water Departments in Orange County operate as an utility and are self-sustaining operations funded through user fees. Orange County water rates may be subject to approval from a state regulatory authority such as a California Public Service Commission or Utility Control Authority.

Public Drinking Water

Water Departments, or Water Companies in Orange County typically own the sources of drinking water they provide and must manage and maintain those sources and their surrounding areas. Surface sources include reservoirs, lakes, and rivers. Orange County groundwater sources can be found in pockets beneath the ground, which can be accessed by drilling wells. Maintenance of Orange County drinking water source sites and limitations on permitted activity around water sources helps minimize contamination. However, drinking water requires treatment prior to distribution to customers.

Water Treatment Facilities in Orange County, CA

Orange County water treatment facilities are used to remove contaminants and make drinking water safe for consumption. Treatment of water begins with the removal of the larger particles in the water through processes known as coagulation, flocculation, and sedimentation. After the large particles are removed, water is filtered through materials such as sand, gravel, and charcoal to remove dissolved particles. The final stage of treatment involves disinfection using chemicals or ultraviolet irradiation. Orange County Water Departments may add fluoride to water at this stage as part of a community health effort to support oral health in the general population. Water Departments are responsible for the day-to-day operations and maintenance of Orange County water treatment facilities. Equipment must also be periodically replaced and treatment processes may also be periodically upgraded.

From the treatment plant, water reaches its customers through a distribution system consisting of pipes, referred to as water mains, storage tanks, and pumping stations. Individual customers connect to water mains to bring public drinking water directly to their properties in Orange County, California.

Water Testing in Orange County

Water Companies typically have a laboratory or testing division responsible for monitoring the quality of tap water throughout the process, from source to distribution. California state regulations require Water Utilities to prepare and issue Orange County water quality reports to the general public several times per year.