Town of Mammoth Lakes

City of Manteca

City of Mission Viejo

City of Monrovia

City of Monterey

County of Monterey

City of Moorpark

City of Newport Beach

​City of Ontario

City of Oxnard

Paradise RPD

Pleasant Hill Park District

City of Richmond

Riverside County

​
City of Roseville

Redwood City

City of San Bruno

City of San Carlos

​San Luis Obispo County

City of San Ramon

​City of Santee

Santa Clara County

City of Santa Clara

City of Santa Maria

City of South San Francisco

City of South Gate

Southgate RPD

City of Tracy

Temple City

City of Tustin

City of Visalia

City of Walnut

City of Westminster

CURRENT AS OF March 1, 2021

Ambrose RPD

City of American Canyon

City of Anaheim

City of Antioch

City of Banning

City of Baldwin Park

Bear Mountain RPD

City of Burlingame

City of Carlsbad

City of Chino

Cordova RPD

Cosumnes RPD

Culver City

Town of Danville

City of Dublin

El Dorado Hills RPD

East Bay RPD

City of Folsom

City of Galt

City of Gilroy

City of Goleta

Greater Vallejo RPD

City of Hawaiian Gardens

City of Hermosa Beach

Hayward RPD

Jurupa Area RPD

City of Laguna Niguel

City of Lakewood

Livermore Area RPD

City of Lodi

City of Los Alamitos

Los Angeles County

Malaga County Water District

City of Manhattan Beach