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Inland Region IV – Membership Listing
Registered members can login to access the membership contact directory for each region and securely access the most current primary and alternate contacts many of the participating agencies listed below.

Tips! Sort multiple columns simultaneously by holding down the shift key and clicking a second, third or even fourth column header.

County

Member Agency

City

Website

Green Valley Water

,

Alameda

Alameda County Water District

Fremont, CA

http://www.acwd.org

Alameda

Alameda, City of

Alameda, CA

https://alamedaca.gov/

Alameda

California Water Service - Livermore

Livermore, CA

http://www.calwater.com

Alameda

Castro Valley Sanitary District

Castro Valley, CA

http://www.cvsan.org

Alameda

Dublin San Ramon Services District

Dublin, CA

http://www.dsrsd.com/

Alameda

East Bay Dischargers Authority

San Lorenzo, CA

http://www.ebda.org/

Alameda

East Bay Municipal Utility District

Oakland, CA

http://www.ebmud.com

Alameda

East Bay Municipal Utility District Wastewater

Oakland, CA

https://ebmud.com/wastewater/

Alameda

Hayward, City of

Hayward, CA

https://www.hayward-ca.gov/

Alameda

Livermore, City of - Municipal Water

Livermore, CA

http://cityoflivermore.net

Alameda

Norris Canyon Property Owners

Castro Valley, CA

Alameda

Oro Loma Sanitary District

San Lorenzo, CA

http://oroloma.org

Alameda

Pleasanton, City of

Pleasanton, CA

http://www.cityofpleasantonca.gov

Alameda

San Leandro, City of

San Leandro, CA

http://www.sanleandro.org

Alameda

Union Sanitary District

Union City, CA

http://www.unionsanitary.com/

Alameda

Zone 7 Water Agency

Livermore, CA

http://www.zone7water.com

Contra Costa

Antioch, City of

Antioch, CA

http://www.ci.antioch.ca.us

Contra Costa

Brentwood, City of

Brentwood, CA

http://www.brentwoodca.gov/

Contra Costa

Central Contra Costa Sanitary District

Martinez, CA

http://www.centralsan.org/

Contra Costa

Contra Costa Water District (for CalWARN Directory)

Concord, CA

http://ccwater.com

Contra Costa

Crockett Community Services District

Crockett, CA

http://www.town.crockett.ca.us

Contra Costa

Delta Diablo

Antioch, CA

http://www.deltadiablo.org

Contra Costa

Diablo Water District

Oakley, CA

http://www.diablowater.org

Contra Costa

Discovery Bay Community Services District, Town of

Discovery Bay, CA

http://www.todb.ca.gov

Contra Costa

Golden State Water Company- Bay Point CSA

Pittsburg, CA

http://www.gswater.com

Contra Costa

Ironhouse Sanitary District

Oakley, CA

http://www.ironhousesanitarydistrict.com/

Contra Costa

Martinez, City of

Martinez, CA

http://www.cityofmartinez.org/

Contra Costa

Mt. View Sanitary District

Martinez, CA

http://www.mvsd.org/

Contra Costa

Pittsburg, City of

Pittsburg, CA

http://www.ci.pittsburg.ca.us/

Contra Costa

Riverview MHP

Pittsburg, CA

Contra Costa

Rodeo Sanitary District

Rodeo, CA

http://www.rodeosan.org/

Contra Costa

Stege Sanitary District

El Cerrito, CA

http://www.stegesan.org/

Contra Costa

West County Wastewater Agency

Richmond, CA

Del Norte

Big Rock Community Services District

Crescent City, CA

Humboldt

Big Lagoon Community Services District

Trinidad, CA

https://www.biglagooncsd.org/

Humboldt

Blue Lake, City of

Blue Lake, CA

http://bluelake.ca.gov/

Humboldt

Del Oro Water - Benbow

Garberville, CA

http://www.delorowater.com/deloro/water-districts/benbow.html

Humboldt

Del Oro Water - Ferndale

Ferndale, CA

http://www.delorowater.com/deloro/water-districts/benbow.html

Humboldt

Eureka, City of

Eureka, CA

http://www.ci.eureka.ca.gov/

Humboldt

Fortuna, City of

Fortuna, CA

https://friendlyfortuna.com/

Humboldt

Green Diamond Resource Company- Korbel-CA1200715

Korbel, CA

http://N/A

Humboldt

Humboldt Bay Municipal Water District

Eureka, CA

https://www.hbmwd.com/

Humboldt

Humboldt Community Services District

Eureka, CA

http://humboldtcsd.org/

Humboldt

Manila Community Service District

Arcata, CA

http://www.manilacsd.com/

Humboldt

McKinleyville Community Services District

McKinleyville, CA

http://mckinleyvillecsd.com/

Humboldt

Palmer Creek Community Services District

Fortuna, CA

Humboldt

Phillipsville C.S.D.

Phillipsville, CA

Humboldt

Rio Dell, City of

Rio Dell, CA

https://www.cityofriodell.ca.gov/water

Humboldt

Scotia Community Services District

Scotia, CA

http://scotiacsd.com/

Humboldt

Trinidad, City of

Trinidad, CA

http://www.trinidad.ca.gov/

Humboldt

Westhaven Community Services District

Trinidad, CA

Lake

California Water Service - Redwood Valley

Lucerne, CA

http://www.calwater.com

Lake

Callayomi County Water District

Middletown, CA

http://www.callayomiwater.com/

Lake

Clearlake Oaks County Water District

Clearlake Oaks, CA

Lake

Cobb Area Water District

Cobb, CA

http://cobbareawater.com/

Lake

County of Lake

Lakeport, CA

Lake

Golden State Water Company- Clear Lake CSA

Clearlake, CA

http://www.gswater.com

Lake

Hidden Valley Lake Community Services District

Hidden Valley Lake, CA

http://www.hvlcsd.org

Lake

Highlands Water Company

Clearlake, CA

http://highlandswater.com/

Lake

Konocti County Water District

Clearlake, CA

Lake

Lake County - Sheriff's Department - OES

Lakeport, CA

http://www.lakesheriff.com/

Lake

Lakeport, City of

Lakeport, CA

http://www.cityoflakeport.com/

Lake

Loch Lomond Mutual Water Company

Cobb, CA

Lake

Mt. Konocti Mutual Water Company

Kelseyville, CA

Lake

Nice Mutual Water Company

Nice, CA

Marin

Bolinas Community Public Utility District

Bolinas, CA

https://bcpud.org/

Marin

Central Marin Sanitation Agency

San Rafael, CA

https://www.cmsa.us/

Marin

Inverness Public Utility Dist

Inverness, CA

https://www.invernesspud.org/

Marin

Marin Municipal Water District

Corte Madera, CA

http://www.marinwater.org

Marin

MAYWOOD MUTUAL WATER COMPANY #1

Tomales, CA

https://www.maywoodmutualwater.com/home/

Marin

Muir Beach Community Service District

Muir Beach, CA

https://muirbeachcsd.com/

Marin

North Marin Water District

Novato, CA

http://www.nmwd.com

Marin

Novato Sanitary District

Novato, CA

http://www.novatosan.com

Marin

Sausalito-Marin City Sanitary District

Sausalito, CA

http://www.sausalitomarincitysanitarydistrict.com/

Marin

Sewerage Agency of Southern Marin

Mill Valley, CA

Marin

Stinson Beach County Water District

Stinson Beach, CA

http://stinson-beach-cwd.dst.ca.us/

Marin

Tomales Village Community Services District

Tomales, CA

Mendocino

Anderson Valley Brewing Company

Boonville, CA

http://www.avbc.com/

Mendocino

Bella Shores

Fort Bragg, CA

Mendocino

Big River Vista Mutual Water Co.

Mendocino, CA

Mendocino

Caspar South Service Co.

Mendocino, CA

Mendocino

Fort Bragg, City of

Fort Bragg, CA

https://city.fortbragg.com/

Mendocino

Hills Ranch Mutual Water Co.

Mendocino, CA

Mendocino

Holly Ranch Villiage

Fort Bragg, CA

Mendocino

Lake View Mutual Water Company

Redwood Valley, CA

Mendocino

Mendocino City Community Services District

Mendocino, CA

Mendocino

Mendocino Unified School District (Albion)

Albion, CA

Mendocino

Mendocino Unified School District (Mendocino)

Mendocino, CA

Mendocino

North Gualala Water Company

Gualala, CA

http://ngwco.com/

Mendocino

Pine Mountain Mutual Water Company, Inc

Willits, CA

http://None

Mendocino

Point Cabrillo Highlands

Mendocino, CA

Mendocino

POINT OF VIEW MUTUAL WATER COMPANY

Mendocino, CA

Mendocino

Redwood Valley County Water District

Redwood Valley, CA

http://www.rvcwd.org/

Mendocino

Rogina Water Company Inc.

Ukiah, CA

http://www.roginawater.com/

Mendocino

SEAFAIR ROAD AND WATER COMPANY

Mendocino, CA

Mendocino

Woods, The

Little River, CA

Monterey

Aromas Water District

Aromas, CA

http://www.aromaswaterdistrict.org/

Monterey

Cachagua Mutual WS

Carmel Valley, CA

Monterey

California Water Service - King City

King City, CA

http://www.calwater.com

Monterey

California Water Service - Salinas

Salinas, CA

http://www.calwater.com

Monterey

California-American Water Company (Monterey)

Pacific Grove, CA

https://amwater.com/caaw/

Monterey

Carmel Area Wastewater District

Carmel, CA

http://cawd.org

Monterey

Castroville Community Services District

Castroville, CA

http://www.castrovillecsd.org/

Monterey

Countryside Estates Mutual Water Company

Prunedale, CA

Monterey

LAGUNA SECA WC

Salinas, CA

Monterey

LOMAS DEL SOL MWS

Aromas, CA

Monterey

Marina Coast Water District

Marina, CA

http://www.mcwd.org/

Monterey

Monterey One Water

Monterey, CA

http://www.mrwpca.com

Monterey

NATIVIDAD RD WS #02

Salinas, CA

Monterey

Seaside County Sanitation District

Seaside, CA

https://www.ci.seaside.ca.us/362/Seaside-County-Sanitation-District

Monterey

Seaside Municipal Water System

Seaside, CA

https://www.ci.seaside.ca.us/435/Seaside-Municipal-Water-System

Monterey

Spreckels Water Company (Tasco)

Salinas, CA

https://www.taproduce.com/

Monterey

Woodside Water System

Carmel, CA

Napa

American Canyon, City of

American Canyon, CA

http://www.cityofamericancanyon.org/

Napa

Calistoga, City of

Calistoga, CA

http://www.ci.calistoga.ca.us

Napa

Howell Mountain Mutual Water Co.

Angwin, CA

https://www.hmmwco.com/

Napa

Meyers Water Company

Napa, CA

Napa

Napa Sanitation District

Napa, CA

http://www.napasan.com/

Napa

Napa, City of

Napa, CA

http://cityofnapa.org/water

Napa

Pope Valley Union Elementary School District

Pope Valley, CA

http://www.pvk8.org/

Napa

St Helena, City of

St. Helena, CA

https://www.cityofsthelena.gov/

Napa

Tucker Acres Mutual Water Company

Calistoga, CA

http://tuckeracres.org

Napa

Yountville, Town Of

Yountville, CA

http://townofyountville.com/

San Benito

Ashford Highlands MCW

Hollister, CA

https://www.ashford-mwc.com/

San Benito

Best Road Mutual Water Co.

Hollister, CA

http://brmwc.com/

San Benito

San Juan Bautista, City of

San Juan Bautista, CA

http://www.san-juan-bautista.ca.us/

San Benito

Sunnyslope County Water District

Hollister, CA

http://www.sscwd.org/

San Benito

Venture Estates Mutual Water Co.

Hollister, CA

http://none

San Francisco

Hayward Water Company

San Francisco, CA

San Francisco

San Francisco PUC - Water, Power & Wastewater

San Francisco, CA

http://sfwater.org/

San Francisco

San Francisco, City and County of, PUC, Wastewater Enterprise

San Francisco, CA

http://sfwater.org

San Mateo

Bayshore Sanitary District

Brisbane, CA

http://bayshoresanitary.com/

San Mateo

Burlingame, City of - Water Department

Burlingame, CA

https://www.burlingame.org/

San Mateo

California Water Service - Bayshore

San Mateo, CA

http://www.calwater.com

San Mateo

California Water Service - Bear Gulch

Menlo Park, CA

http://www.calwater.com

San Mateo

Coastside County Water District

Half Moon Bay, CA

http://www.coastsidewater.org

San Mateo

Daly City, City of

Daly City, CA

http://www.dalycity.org/

San Mateo

East Palo Alto Sanitary District

Palo Alto, CA

http://www.epasd.com/

San Mateo

Foster City, EMID

Foster City, CA

http://www.fostercity.org/

San Mateo

Hillsborough, Town of

Burlingame, CA

http://www.hillsborough.net/

San Mateo

Menlo Park Municipal Water District

Menlo Park, CA

https://www.menlopark.org/water

San Mateo

Mid - Peninsula Water District

Belmont, CA

http://www.midpeninsulawater.org

San Mateo

Millbrae, City of

Millbrae, CA

http://www.ci.millbrae.ca.us/

San Mateo

Montara Sanitary District

Montara, CA

http://mwsd.montara.org/

San Mateo

North Coast County Water District

Pacifica, CA

http://www.nccwd.com/

San Mateo

O'Connor Tract Cooperative Water Company

Menlo Park, CA

http://www.oconnorwater.org/

San Mateo

Pacifica, City of Public Works Department Wastewater Division

Pacifica, CA

https://www.cityofpacifica.org/

San Mateo

Palo Alto Park Mutual Water Company

Palo Alto, CA

San Mateo

Portola Improvement Association Mutual Water Company

La Honda, CA

San Mateo

Redwood City

Redwood City, CA

http://www.redwoodcity.org/

San Mateo

Redwood Glen Camp & Conference CTR

Loma Mar, CA

http://www.redwoodglen.com

San Mateo

San Bruno, City of

San Bruno, CA

https://sanbruno.ca.gov/

San Mateo

San Carlos, City of - Public Works

San Carlos, CA

http://www.cityofsancarlos.org

San Mateo

San Mateo, City of

San Mateo, CA

http://Cityofsanmateo.org

San Mateo

Sewer Authority Mid-Coastside

Half Moon Bay, CA

http://www.samcleanswater.org/

San Mateo

Silicon Valley Clean Water

Redwood City, CA

http://www.svcw.org

San Mateo

West Bay Sanitary District

Menlo Park, CA

http://www.westbaysanitary.org

San Mateo

Westborough Water District

South San Francisco, CA

https://www.westboroughwater.org

Santa Clara

California Water Service - Corporate Offices

San Jose, CA

https://www.calwater.com/

Santa Clara

California Water Service - Los Altos

Los Altos, CA

http://www.calwater.com

Santa Clara

Emerald Valley Mutual Water Company

Gilroy, CA

Santa Clara

Gilroy, City of

Gilroy, CA

http://www.cityofgilroy.org/

Santa Clara

Great Oaks Water Company

San Jose, CA

http://www.greatoakswater.com/

Santa Clara

Green Acres Mutual Water Company

Morgan Hill, CA

Santa Clara

Milpitas, City of

Milpitas, CA

http://www.ci.milpitas.ca.gov/

Santa Clara

Morgan Hill, City of

San Jose, CA

http://www.morganhill.ca.gov

Santa Clara

Mountain View, City of

Mountain View, CA

http://www.mountainview.gov/

Santa Clara

Palo Alto, City of

Palo Alto, CA

http://www.cityofpaloalto.org/

Santa Clara

Purissima Hills Water District

Los Altos Hills, CA

http://www.purissimawater.org/

Santa Clara

Rancho Robles Mutual Water and Road Company

Morgan Hill, CA

Santa Clara

Roseview Heights Mutual Water Company

San Jose, CA

https://roseviewwater.com/

Santa Clara

San Jose Municipal Water System

San Jose, CA

https://www.sanjoseca.gov/index.aspx?nid=1573

Santa Clara

San Jose Santa Clara Regional Wastewater Facility

San Jose, CA

https://www.sanjoseca.gov/your-government/environment/water-utilities/regional-wastewater-facility

Santa Clara

San Jose Water Company

San Jose, CA

http://www.sjwater.com

Santa Clara

Santa Clara Valley Water District

San Jose, CA

http://www.valleywater.org

Santa Clara

Santa Clara, City of

Santa Clara, CA

http://www.santaclaraca.gov/

Santa Clara

Stanford University

Stanford, CA

Santa Clara

Sunnyvale, City of

Sunnyvale, CA

http://sunnyvale.ca.gov/

Santa Clara

Water-Water-Water

San Jose, CA

Santa Clara

West Valley Sanitation District

Campbell, CA

http://www.westvalleysan.org/

Santa Cruz

Big Basin Water Company

Boulder Creek, CA

http://www.bigbasinwater.com/

Santa Cruz

Bracken Brae Country Club

Boulder Creek, CA

Santa Cruz

Central Water District

Aptos, CA

http://www.cmsa.us

Santa Cruz

Forest Lakes Mutual Water Company

Felton, CA

https://www.forestlakesfelton.com/

Santa Cruz

Las Cumbres Mutual Water Co.

Los Gatos, CA

https://www.lacumbrewater.com/

Santa Cruz

Melody Woods Water Company

Los Gatos, CA

Santa Cruz

Pajaro Valley Unified School District

Watsonville, CA

http://www.pvusd.net/

Santa Cruz

Pure Source Water, Inc.

Aptos, CA

http://www.psh2o.com

Santa Cruz

Rancho Corralitos

Corralitos, CA

Santa Cruz

Redwood Lodge Water Company

Los Gatos, CA

Santa Cruz

River Grove Mutual Water Association

Felton, CA

Santa Cruz

San Lorenzo Valley Water District

Boulder Creek, CA

http://www.slvwd.com

Santa Cruz

Santa Cruz Water Department, City of

Santa Cruz, CA

http://cityofsantacruz.com/

Santa Cruz

Santa Cruz, City of

Santa Cruz, CA

http://cityofsantacruz.com/

Santa Cruz

Scotts Valley Water District

Scotts Valley, CA

http://www.svwd.org

Santa Cruz

Soquel Creek Water District

Soquel, CA

http://www.soquelcreekwater.org

Santa Cruz

Sunset Beach Mutual Water Company (CA4400599)

Watsonville, CA

Santa Cruz

Trout Gulch Mutual Water Co.

Aptos, CA

http://www.troutgulchwater.org

Santa Cruz

Watsonville, City of

Watsonville, CA

http://www.cityofwatsonville.org/

Solano

Benicia, City of

Benicia, CA

http://ci.benicia.ca.us

Solano

California Water Service- Dixon District

Dixon, CA

Solano

Dixon, City of

Dixon, CA

https://www.cityofdixon.us/

Solano

Fairfield, City of

Fairfield, CA

https://www.fairfield.ca.gov/

Solano

Fairfield-Suisun Sewer District

Fairfield, CA

http://www.fssd.com/

Solano

Solano Irrigation District

Vacaville, CA

http://www.sidwater.org/

Solano

Vacaville, City of

Elmira, CA

http://www.ci.vacaville.ca.us/

Solano

Vallejo Flood & Wastewater District

Vallejo, CA

https://www.vsfcd.com/

Solano

Vallejo, City of - Water Department

Vallejo, CA

http://www.ci.vallejo.ca.us/

Sonoma

Alexander Valley Acres Mutual Water Company

Healdsburg, CA

Sonoma

Athena Terrace Mutual Water Company

Santa Rosa, CA

Sonoma

BELMONT TERRACE MUTUAL WATER

Sebastopol, CA

http://belmontterrace.org/

Sonoma

Boulevard Heights Mutual Water Company

Petaluma, CA

Sonoma

Camp Meeker Recreation & Park District

Camp Meeker, CA

http://campmeeker.org/

Sonoma

Canon Manor Water Company

Santa Rosa, CA

Sonoma

CARMET BY THE SEA WATER CO.

Forestville, CA

Sonoma

Cloverdale, City of

Cloverdale, CA

http://www.cloverdale.com

Sonoma

Cotati, City of

Cotati, CA

http://ci.cotati.ca.us/

Sonoma

Diamond A Mutual Water Co.

Sonoma, CA

https://diamondasonoma.com/diamond-a-ranch-water-company.html

Sonoma

Fircrest Mutual Water Company

Sebastopol, CA

Sonoma

Forestville County Water District

Forestville, CA

http://www.forestvillewd.com

Sonoma

Gill Creek Mutual Water Co

Geyserville, CA

Sonoma

Healdsburg, City of

Healdsburg, CA

http://www.ci.healdsburg.ca.us/

Sonoma

Heights Mutual Water Company

Forestville, CA

http://www.rruwater.com/

Sonoma

Holland Heights Mutual Water Company

Healdsburg, CA

Sonoma

Kelly Mutual Water Company

Sebastopol, CA

Sonoma

Kenwood Water Company

Santa Rosa, CA

Sonoma

Madrone Mutual Water Company

Cotati, CA

http://None

Sonoma

Melita Heights Mutual Water Company

Santa Rosa, CA

https://www.facebook.com/melitaheightsmutualwatercompany

Sonoma

Michele Mutual Water Company

Fulton, CA

Sonoma

Mt. Weske Estates Water Company

Windsor, CA

Sonoma

Occidental Community Services District

Occidental, CA

Sonoma

Penngrove Water Company

Santa Rosa, CA

http://www.pkwaterco.com

Sonoma

Petaluma Public Works and Utilities, City of

Petaluma, CA

http://cityofpetaluma.org

Sonoma

Rohnert Park, City of

Rohnert Park, CA

https://www.rpcity.org/

Sonoma

Russian River County Water District

Forestville, CA

http://www.rrcwater.org/

Sonoma

Russian River Mutual Water Co.

Healdsburg, CA

https://www.rruwater.com/mutualWater.shtml

Sonoma

Santa Rosa, City of

Santa Rosa, CA

http://www.ci.santa-rosa.ca.us/

Sonoma

Sea Ranch Water Company, The

The Sea Ranch, CA

http://www.tsra.org

Sonoma

Sebastopol, City of - Public Works

Sebastopol, CA

http://ci.sebastopol.ca.us

Sonoma

Sereno Del Mar Water Company

Forestville, CA

Sonoma

Sonoma County Water Agency

Santa Rosa, CA

http://www.scwa.ca.gov

Sonoma

Sonoma, City of

Sonoma, CA

https://www.sonomacity.org/

Sonoma

Sweetwater Springs Water District

17081 Hwy 116, XX

http://www.sweetwatersprings.com/

Sonoma

Valley of the Moon Water District

Sonoma, CA

http://www.vomwd.com

Sonoma

Vinehill Vista Mutual Water

Sebastopol, CA

Sonoma

Wendell Lane Mutual Water Company

Sebastopol, CA

Sonoma

Willowside Mutual Water Company

Fulton, CA

Sonoma

Windsor, Town of

Windsor, CA

https://townofwindsor.com/

Tuolumne

Sonora Water Company, Inc.

Jamestown, CA

 

 

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