Upper San Gabriel Valley Municipal Water District
Where Solutions Flow
602 E. Huntington Drive, Suite B., Monrovia, CA, 91016 | (626) 443-2297

Service Area

The Upper San Gabriel Valley Municipal Water District (Upper District), incorporated in 1959, covers approximately 144 square miles and includes all or parts of 18 cities and portions of unincorporated Los Angeles County with more than 950,000 residents.  Upper District partners with many public and private entities to provide a sustainable, high quality water supply to residents and businesses within the greater San Gabriel Valley.

Consistent with its motto of “Where Solutions Flow,” Upper District is widely recognized for its customer service orientation, community involvement, and creativity in promoting water quality, water recycling, and water conservation.

Service Area District Map


Utilizing MWD’s distribution system, Upper District provides wholesale water service to local water suppliers through the nine service connections listed below. Approximately 20,000 to 50,000 acre-feet of imported water is served through these connections each year. The majority of the water is used for groundwater replenishment.

Area USG–1

golden state water company logoThe Golden State Water Company (USG-1) is a public utility in California and is a wholly owned subsidiary of American States Water Company. The company is regulated by the U.S. Environmental Protection Agency, the California Department of Public Health and the California Public Utilities Commission.

Area USG–2

city of south-pasadena logo

The City of South Pasadena is situated six miles from downtown Los Angeles. Called the City of Trees, the area is known for its stunning homes, unique small businesses, and top quality schools. South Pasadena’s diverse population of about 25,000 occupies a mere 3.44 square miles of flatlands and hillsides on the west side of the San Gabriel Valley.

Area USG–3

San-Gabriel-Basin-Watermaster-logoThe Main San Gabriel Basin Watermaster, an agency devoted to the management and protection of groundwater resources within the Main San Gabriel Groundwater Basin in Los Angeles County, California.

Area USG–4

Suburban water co logoSuburban Water Systems, a part of SouthWest Water Company, is an investor-owned water utility providing high-quality water and reliable service in an approximately 42-square-mile service area that covers all or portions of Glendora, Covina, West Covina, La Puente, Hacienda Heights, City of Industry, Whittier, La Mirada, La Habra, Buena Park and unincorporated portions of California’s Los Angeles and Orange counties.

Area USG–5

city of alhambra logoThe City of Alhambra is a city of charming, well-manicured residential neighborhoods and many new businesses. Located minutes from downtown Los Angeles, two-thirds of the State’s 100 largest corporations are located nearby. There are numerous educational, medical and transportation services, and Alhambra has some of the region’s strongest retail centers, drawing sales from auto dealerships and shopping districts.

Area USG–6

city of arcadia

The City of Arcadia was incorporated in 1903 and became a Charter City in 1951. It is an upper-middle class community of approximately 60,000 people in an 11.2 square mile area located 20 miles east of Los Angeles.  The City government is “full-service” with its own Police Department, Fire Department and Library, and a City Council-City Manager form of government.

Area USG–7

city of monrovia logo

The City of Monrovia is a city located in the foothills of the San Gabriel Mountains in the San Gabriel Valley of Los Angeles County, California, United States. The population was 36,590 at the 2010 census, down from 36,929 at the 2000 census. Monrovia has been used for filming TV shows, movies and commercials. Monrovia is the fourth oldest general law city in Los Angeles County and the L.A. Basin (after Los Angeles, Santa Monica, and Pasadena).

Area USG–8

city of azusa

The City of Azusa is a city in Los Angeles County, California, United States. The population was 46,361 at the 2010 census, up from 44,712 at the 2000 census. Though sometimes assumed to be a compaction of the phrase “everything from A to Z in the USA” from an old Jack Benny joke, the place name “Azusa” traces back to at least the 18th century.

Area USG–9

Valley County Water District Logo

The Valley County Water District Water Operations Division maintains and operates a water system consisting of seven operational wells, a Metropolitan Water District service connection, six booster pump stations, six reservoirs (10.0 million gallons of storage), 110-miles of distribution and transmission mains ranging in size from 2-inches to 24-inches, 1,622 valves and 782 fire hydrants.