Metropolitan Water District of Southern California
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Western Municipal Water District of Riverside County
Western Municipal Water District of Riverside County
Western Municipal Water District of Riverside County
14205 Meridian Parkway
Riverside, CA 92518
(951) 571-7100
FAX (951) 571-0590
Web Site:
  Deputy General Manager: Craig Miller
  Representatives on Metropolitan board: Donald Galleano
  Date formed: January 26, 1954
  Joined Metropolitan: 1954
  Service area: 527 square miles
  Water sources for area served
  Local: 65%
  Metropolitan: 35%
  Water served
  Municipal & Industrial: 80%
  Agricultural: 20%
  Number of water purveyors the
district wholesales water to:


Cities served Corona, Eastvale, Jurupa Valley, Lake Elsinore, Norco, Perris, Riverside, Murrieta and Temecula..

Unincorporated areas served - Eagle Valley, El Sobrante, Lake Mathews, March Air Reserve Base, Rubidoux, Temescal Canyon and Woodcrest.

Population: 878,000


Western was formed in 1954 under the Municipal Water District Act of 1911 for the purpose of bringing supplemental water from the Metropolitan to a growing western Riverside County.  Today, Western serves roughly 23,000 retail and eight wholesale customers with water from the Colorado River, Northern California via the State Water Project and groundwater supplies.  During the years since Western was approved by voters, the District has served a leadership role in local water resource expansion and water resource protection..

The District’s Board and staff work to develop additional imported water supply reliability as well as to protect the District’s financial integrity.  Major projects and initiatives include:

  • Expansion of the Chino Desalters
  • Expansion and conversion of the Western Water Recycling Facility to include tertiary-treated recycled water deliveries
  • The Santa Ana River Water Rights
  • Riverside-Corona Feeder
  • Water Budgets

Western works diligently to represent itself and its agencies at all government levels through advocacy efforts particularly in protecting revenue streams from state raids.

Western is one of five of the member agencies of the Santa Ana Watershed Project Authority, a regional water resources planning and project implementation organization. Western’s general manager is a court-appointed Watermaster, responsible for reporting compliance with water quality and quantity provisions of court orders regarding water rights issues in the Santa Ana watershed. Western also works with SAWPA in operating a 30 MGD Inland Empire Brine Line that flows to the Orange County Treatment Plant. This system helps protect and improve the quality of water in the watershed. Western provides contract water and wastewater administration and operation services to agencies within its general district.

Western also operates Landscapes Southern California Style, a unique water efficiency garden that assists Inland Empire residents in water-wise ideas for their landscapes.

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Page updated: May 12, 2015