Private company

Eastern Municipal Water District of Southern California

Logo: EMWD, CC BY-SA 4.0, via Wikimedia Commons3

Regional water district formed in 1950

The Eastern Municipal Water District of Southern California is a regional water district formed in 1950 to secure additional water for a largely rural area of western Riverside County. In addition to water service, responsibilities include sewage collection, water desalination and water recycling. EMWD also sells to eight other water agencies, which in turn, serve their own customers.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1950Founded1

The Eastern Municipal Water District of Southern California is a regional water district formed in 1950 to secure additional water for a largely rural area of western Riverside County. In addition to water service, responsibilities include sewage collection, water desalination and water recycling.2

The story

Since its formation in 1950, Eastern Municipal Water District (EMWD) has changed from a small, primarily agricultural-serving agency, to one whose major demands come from domestic customers.

Authorized under the Municipal Water District Act of 1911, EMWD's duties and responsibilities are further delineated in the California Water Code. In 1951, EMWD annexed to the Metropolitan Water District of Southern California (MWD).

EMWD employs approximately 620 employees.

From Wikipedia’s article on Eastern Municipal Water District of Southern California, shared under CC BY-SA 4.0.4

Products and brands

Facilities

EMWD owns and operates more than 2,500 miles of potable water pipeline throughout its service area. EMWD has 79 potable (drinking) water storage tanks, 86 active pumping plants, 14 active domestic wells and 13 brackish (desalter) wells.

EMWD owns and operates potable (drinking) water filtration plants in Hemet and Perris. It has three reverse osmosis groundwater desalination facilities in Menifee.

EMWD also owns and operates four Regional Water Reclamation Facilities (RWRF) located in Perris, Moreno Valley, Temecula and San Jacinto. It treats 47 million US gallons of wastewater each day from more than 263,000 wastewater (sewer) connections. EMWD converts that wastewater to tertiary-treated recycled water, which is then used to irrigate landscapes for sports fields, medians, golf courses, parks, schools, restricted recreational use and more.

Service area

EMWD's 558-square-mile service area includes all or portions of the cities of Moreno Valley, Hemet, Perris, San Jacinto, Menifee, Perris, Murrieta, Temecula, and Canyon Lake. It also includes the unincorporated communities of Mead Valley, Good Hope, Romoland, Homeland, Winchester, French Valley, Valle Vista, and Diamond Valley. The population within the current 555-square-mile (1,440 km2) service area is about 870,500.

Read the full text

EMWD provides service to about 159,000 domestic water accounts, 114 agricultural accounts, 263,000 wastewater accounts and 686 recycled water accounts. EMWD is California's sixth-largest retail water agency, serving roughly 34 percent of Riverside County's population.

From Wikipedia’s article on Eastern Municipal Water District of Southern California, shared under CC BY-SA 4.0.4

Timeline

  1. 1950Founded Founded1