Class A Water Companies
More than 10,000 service connections
Coronado (HQ); Service Areas: Los Angeles, Monterey, Placer, Sacramento, San Diego, Sonoma, Ventura and Yolo Counties)
California Water Service Company
San Jose (HQ); Service Areas/Districts: Antelope Valley, East Los Angeles, Rancho Dominguez, Westlake, (Los Angeles County); Bakersfield, Kern River Valley (Kern County); Bayshore, Bear Gulch (San Mateo County); Chico, Oroville (Butte County); Dixon (Solano County); King City, Salinas (Monterey County); Livermore (Alameda County); Los Altos (Santa Clara County); Marysville (Yuba County); Redwood Valley (Sonoma and Lake Counties); Selma (Fresno County); Visalia (Tulare County); Stockton (San Joaquin); Willows (Glenn County)
San Dimas (Contra Costa, Imperial, Lake, Los Angeles, Orange, Sacramento, San Bernardino, San Luis Obispo, Santa Barbara and Ventura Counties)
San Jose (Santa Clara County)
Apple Valley (San Bernardino County) and Downey (Los Angeles County)
San Gabriel Valley Water Company
El Monte (Los Angeles and San Bernardino Counties)
San Jose (Santa Clara County)
Covina (Los Angeles and Orange Counties)
Class B Water Companies:
2,000-10,000 service connections
Fresno (Fresno County)
Chico (Butte and Tuolumne Counties)
Pasadena (Los Angeles County)
