California water providers — page 6
Find published drinking-water records, providers, and official agency resources for California. Review sources, sample dates, and coverage.
Official drinking-water resources
The responsible agency may differ for tribal systems. Record availability and sample dates vary by provider.
Community systems appear first. Sort: Population served · A–Z
Public water systems
7,406 systems in the imported directory. Includes community systems, schools, workplaces, and other public systems.
- Western Heights Water CompanyCA3610053 · CWS · Population served: 7,705
- Earlimart PudCA5410021 · CWS · Population served: 7,679
- Oceano Comm Services Dist.CA4010005 · CWS · Population served: 7,601
- City of SebastopolCA4910011 · CWS · Population served: 7,522
- Castroville Community Services DistrictCA2710005 · CWS · Population served: 7,515
- Folsom State PrisonCA3410032 · CWS · Population served: 7,502
- City of HughsonCA5010008 · CWS · Population served: 7,481
- City of Dos PalosCA2410002 · CWS · Population served: 7,452
- City of FowlerCA1010006 · CWS · Population served: 7,448
- City of EscalonCA3910003 · CWS · Population served: 7,429
- Gswc - CalipatriaCA1310003 · CWS · Population served: 7,363
- San Gabriel Valley Water Co-Montebello 2CA1910117 · CWS · Population served: 7,330
- Vandenberg Village Comm. Serv. Dist.CA4210017 · CWS · Population served: 7,308
- City of CotatiCA4910016 · CWS · Population served: 7,303
- City of GridleyCA0410004 · CWS · Population served: 7,269
- Cal-Water Service Co.-WillowsCA1110003 · CWS · Population served: 7,240
- Awa, IoneCA0310002 · CWS · Population served: 7,227
- City of WintersCA5710005 · CWS · Population served: 7,115
- Los Osos Community Services DistrictCA4010016 · CWS · Population served: 7,086
- Lake Arrowhead CsdCA3610005 · CWS · Population served: 7,038
- Santa Ynez River Water Cons. Dist. Id#1CA4210020 · CWS · Population served: 7,022
- Rincon Northern090600147 · CWS · Population served: 7,003
- Peter Pitchess Honor Rancho Detn. CtrCA1900046 · CWS · Population served: 7,000
- Golden State Wc - Cowan HeightsCA3010047 · CWS · Population served: 6,997
- Heber Public Utility DistrictCA1310007 · CWS · Population served: 6,979
- City of Fort BraggCA2310001 · CWS · Population served: 6,919
- Nevada Id - Lake of PinesCA2910014 · CWS · Population served: 6,870
- Nevada Id - North AuburnCA3110026 · CWS · Population served: 6,870
- Ojai Water SystemCA5610014 · CWS · Population served: 6,801
- Beale Air Force BaseCA5810700 · CWS · Population served: 6,785
- Foresthill Public Utility DistCA3110003 · CWS · Population served: 6,782
- Nuevo Water CompanyCA3310026 · CWS · Population served: 6,733
- Joshua Basin Water DistrictCA3610025 · CWS · Population served: 6,640
- China Lake Naval Air Weapons StationCA1510703 · CWS · Population served: 6,600
- Psmcsd - PajaroCA2710020 · CWS · Population served: 6,500
- Madera Valley Water CompanyCA2010010 · CWS · Population served: 6,494
- City of ColusaCA0610002 · CWS · Population served: 6,447
- Los Angeles Cwwd 36-Val VerdeCA1910185 · CWS · Population served: 6,376
- City of HoltvilleCA1310005 · CWS · Population served: 6,355
- Maywood Mutual Water Co. #2CA1910085 · CWS · Population served: 6,349
- Helendale Community Service DistrictCA3610112 · CWS · Population served: 6,347
- North Tahoe Pud - MainCA3110001 · CWS · Population served: 6,321
- Calaveras PudCA0510002 · CWS · Population served: 6,286
- Purissima Hills Water DistrictCA4310021 · CWS · Population served: 6,245
- Hidden Valley Lake CsdCA1710015 · CWS · Population served: 6,235
- Golden State Water Co - Apple Vly SouthCA3610107 · CWS · Population served: 6,208
- Cutler PudCA5410001 · CWS · Population served: 6,200
- City of WillitsCA2310004 · CWS · Population served: 6,175
- City of Industry Waterworks SystemsCA1910029 · CWS · Population served: 6,158
- Solvang Water DivisionCA4210013 · CWS · Population served: 6,126
- City of GustineCA2410003 · CWS · Population served: 6,110
- Ventura River Water DistrictCA5610022 · CWS · Population served: 6,100
- Montara Water And Sanitary DistrictCA4110010 · CWS · Population served: 6,078
- Maywood Mutual Water Co. #3CA1910086 · CWS · Population served: 6,059
- Lake Almanor Country Club MwcCA3210006 · CWS · Population served: 6,000
- Sweetwater Springs Cwd - GuernevilleCA4910004 · CWS · Population served: 6,000
- Bellflower Municipal Water SystemCA1910018 · CWS · Population served: 5,999
- Malaga County Water DistrictCA1010042 · CWS · Population served: 5,979
- Konocti County Water DistrictCA1710006 · CWS · Population served: 5,928
- Golden State Water Company - Los OsosCA4010017 · CWS · Population served: 5,924
- Glen Helen Water SystemCA3600108 · CWS · Population served: 5,900
- Santa Ana River Water CompanyCA3310033 · CWS · Population served: 5,848
- San Joaquin County - Lincoln VillageCA3910010 · CWS · Population served: 5,841
- Rancho Murieta Community ServiCA3410005 · CWS · Population served: 5,728
- Naval Base Ventura County, Point MuguCA5610700 · CWS · Population served: 5,700
- Pauma090605012 · CWS · Population served: 5,700
- Keyes Community Services Dist.CA5010009 · CWS · Population served: 5,672
- Tahoe City Pud - MainCA3110010 · CWS · Population served: 5,661
- Serrano Water DistrictCA3010082 · CWS · Population served: 5,659
- Golden State Water Co - Arden Water ServCA3410003 · CWS · Population served: 5,658
- Cal Am - MeadowbrookCA2410008 · CWS · Population served: 5,656
- City of CalistogaCA2810002 · CWS · Population served: 5,610
- Bear Valley CsdCA1510038 · CWS · Population served: 5,592
- Cdcr California Health Care FacilityCA3910803 · CWS · Population served: 5,551
- City of WilliamsCA0610004 · CWS · Population served: 5,538
- Cambria Comm Services DistCA4010014 · CWS · Population served: 5,532
- Palm Ranch Irrigation Dist.CA1910103 · CWS · Population served: 5,507
- Riverstone/Rootcreek Water DistrictCA2010016 · CWS · Population served: 5,507
- Hilmar County Water DistrictCA2410012 · CWS · Population served: 5,504
- Maywood Mutual Water Co. #1CA1910084 · CWS · Population served: 5,500
- Millview County Water DistrictCA2310006 · CWS · Population served: 5,500
- Tud - Columbia Water SystemCA5510013 · CWS · Population served: 5,463
- City of St. HelenaCA2810004 · CWS · Population served: 5,386
- La Habra Heights CwdCA1910218 · CWS · Population served: 5,325
- Yosemite Spring Park Util CoCA2010005 · CWS · Population served: 5,300
- Cwsc Salinas HillsCA2710012 · CWS · Population served: 5,293
- Running Springs Water DistrictCA3610062 · CWS · Population served: 5,268
- Suburban Water Systems-GlendoraCA1910046 · CWS · Population served: 5,249
- Redwood Valley County Water DistrictCA2310008 · CWS · Population served: 5,200
- Ccwd - Copper CoveCA0510017 · CWS · Population served: 5,187
- City of Buellton Water DivisionCA4210018 · CWS · Population served: 5,161
- Wasco St. Prison Reception CtrCA1510801 · CWS · Population served: 5,124
- California State Prison - SolanoCA4810800 · CWS · Population served: 5,100
- Denair Community Services DistrictCA5010021 · CWS · Population served: 5,090
- City of JacksonCA0310001 · CWS · Population served: 5,019
- Kern Valley State PrisonCA1510802 · CWS · Population served: 5,000
- Pleasant Valley Mutual Water CoCA5610008 · CWS · Population served: 5,000
- City of Grass ValleyCA2910001 · CWS · Population served: 4,947
- Awa, TannerCA0310003 · CWS · Population served: 4,940
- Stallion Springs CsdCA1510025 · CWS · Population served: 4,910