Alameda County Water District

Alpine Water Users Association

Amador Water Agency

Anaheim Public Utilities

Apple Valley Ranchos Water Company

Azusa Light & Water Department

Beverly Hills

Big Bear Area Regional Wastewater Agency

Bolinas Community Public Utility District

Burbank Utilities

Cabazon County WD

California-American Water Company

Baldwin Hills

Coronado

Duarte

Monterey

San Marino

Thousand Oaks / Camarillo

California Water Service Company (CalWater)

Bakersfield

Bear Gulch

Chico

Dixon

East Los Angeles

Hermosa-Redondo

King City

Livermore

Los Altos

Marysville

Mid-Peninsula

Oroville

PalosVerdes

Salinas

Selma

South San Francisco

Stockton

Visalia

Westlake

Willows

Calleguas Municipal Water District

Camarillo Sanitary District

Camrosa Water District

Carmichael Water District

Castaic Lake Water Agency

Cedarpines Park Mutual Water Company

Central Coast Water Authority

Chino Basin Watermaster

Citizens Utilities

Citrus Heights Water District

Coachella Valley Water District

Contra Costa Water District

Coastside County Water District

Crescenta Valley Water District

Davis

Cucamonga County Water District

Descanso Community Water District

Desert Water Agency (Palm Springs)

Dominguez Services Corporation

Dublin San Ramon Services District

East Bay Municipal Utility District

El Dorado County Water Agency

El Dorado Irrigation District

Elsinore Valley Municipal Water District

San Dieguito Water District

Fairfield Public Works Water Divison

Fallbrook Public Utility District

Estero Municipal Improvement District

Fresno Public Utilities

Glenshire Mutual Water Company

Goleta Water District

Nevada Irrigation District

Healdsburg, Public Works Department

Helix Water District

Hesperia Water District

Hetch Hetchy Water & Power

Hi-Desert Water District

Humboldt Bay Municipal Water District

Imperial Irrigation District

Inyo County Water Department

Irvine Ranch Water District

Lakeport

Lakewood

Las Virgenes Municipal Water District

Lassen Municipal Utility District

Long Beach Water Department

Los Angeles Department of Water and Power (LADWP)

Mammoth Community Water District

Manteca

Marin Municipal Water District

Marina Coast Water District

Metropolitan Water District of Southern California

Modesto Irrigation District

Mojave Water Agency District

Montecito Water District

Monterey Park, Water Utility Division

Monterey Peninsula Water Management District

Mountain Gate Community District

Mountain View

Navajo Water CO., Inc.

North Marin Water District

Oakdale Irrigation District

Orange County Water District

Otay Water District

Palmdale Water District

Padre Dam Water District

Paradise Irrigation District

Palo Alto Utilities Department

Park Water Company

Pasadena

Pasadena Water and Power

Pleasanton Public Works Department

Rainbow Municipal Water District

Redding Water Utility

Rio Linda-Elverta Community Water District

Riverside

Sacramento Regional County Sanitation District

San Benito County Water District

San Bernardino Valley Municipal Water District

San Diego - Water Department

San Diego County Water Authority (SDCWA)

San Francisco Public Utilities Commission

Main San Gabriel Basin Watermaster

San Gabriel Valley Water

San Jose Water Company

San Lorenzo Valley Water District

Vallecitos Water District

San Juan Water

Santa Barbara Water

Santa Clara Valley Water District

Santa Monica

Shasta Lake

Soquel Creek Water District

Southwest Water Company

Southern California Water Company

American States Water Company

Stallion Springs Community Services District

Stinson Beach County Water District

Suburban Water Systems

Southwest Water Company

Sweetwater Authority

Three Valleys Municipal Water District

Torrance Water Commission

Trabuco Canyon Water District

Upper San Gabriel Valley Municipal Water District

Valley Center Municipal Water District

Vandenberg Village Community Services District

Victor Valley Water District

Vista Irrigation District

Water Replenishment District of Southern California

Watsonville

Western Heights

Western Municipal Water District

Willits

Yucaipa Valley Water District

Zone 7 Water Agency