California tap water quality
PFAS results for 707 California water systems from EPA's latest nationwide testing. Enter your address for your own utility's record and a filter recommendation.
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707systems tested
34%had PFAS detected
166over EPA's 4 ppt limit
Highest PFAS levels in California
| Water system | Max PFOA (ppt) | Max PFOS (ppt) |
|---|---|---|
| Running Springs Water District | 15.9 | 236.5 |
| Potrero Elementary School | 188.3 | 64.2 |
| Liberty Utilities - Bellflower-Norwalk | 16 | 59 |
| Montebello Land & Water Co. | 16 | 53 |
| City of Atwater | 33 | 45 |
| Downey - City Water Dept. | 15 | 44 |
| City of Sacramento Main | 17.3 | 41.4 |
| City of Clovis | 18 | 41 |
| Tract 349 Mutual Water Co. | 8.2 | 36.5 |
| Atascadero State Hospital | — | 33 |
All California water systems
- Alameda County Water District
- Alco Water Service
- American Water O&m LLC - Vafb
- Arroyo Grande Water Department ⚠
- Arvin Community Services Dist
- Atascadero Mutual Water Co ⚠
- Azusa Light and Water ⚠
- Bakman Water Company
- Beaumont Cherry Valley WD
- Bella Vista Water District
- Bellflower - Somerset Mwc ⚠
- Beverly Hills-City Water Dept.
- Big Bear City Csd ⚠
- Big Bear Lake Dwp - Big Bear System ⚠
- Brentwood
- Burbank-City Water Dept.
- Butte-Glenn Community College Dist
- Cal Am - Fruitridge Vista
- Cal Am - Suburban Rosemont ⚠
- Cal Am Water Company - Monterey ⚠
- Cal American Water Co
- Cal-Am Water Company - Duarte ⚠
- Cal-Am Water Coronado
- Cal-Water Service Co.-Chico ⚠
- Cal-Water Service Co.-Marysville
- Cal-Water Service Co.-Oroville
- Cal/Am Water Company - Baldwin Hills
- Cal/Am Water Company - San Marino
- Calam - Antelope
- Calam - Lincoln Oaks
- Calam - Parkway ⚠
- Calif State Polytechnical Univ - Pomona
- California Institution for Men
- California Mens Colony
- California State University Fresno ⚠
- California Water Service - Bear Gulch
- California Water Service - Livermore ⚠
- California Water Service - San Carlos
- California Water Service - San Mateo
- California Water Service - Stockton ⚠
- California Water Service Co - Westlake
- California Water Service Co. - Dixon
- California Water Service Co. - Dominguez
- California Water Service Co. - Ela ⚠
- California Water Service Co. - Herm/Redo
- California Water Service Co. - Palos Ver
- California Water Service-S San Francisco
- Camarillo Water Dept
- Camp Pendleton (North)
- Camp Pendleton (South)
- Camrosa Water District ⚠
- Carlsbad MWD
- Carmichael Water District
- Carpinteria Valley Water District
- Casitas Municipal Water Dist
- Ccwd - Ebbetts Pass
- Cerritos - City Water Dept. ⚠
- Chowchilla City Water Dept ⚠
- Citrus Heights Water District
- City of Adelanto ⚠
- City of Alhambra
- City of American Canyon
- City of Anaheim ⚠
- City of Anderson
- City of Antioch
- City of Arcadia ⚠
- City of Arcata
- City of Atwater ⚠
- City of Avenal
- City of Bakersfield ⚠
- City of Banning
- City of Bell Gardens ⚠
- City of Benicia
- City of Brawley
- City of Brea
- City of Buena Park ⚠
- City of Burlingame
- City of Calexico
- City of California City
- City of Ceres ⚠
- City of Chino
- City of Chino Hills
- City of Clovis ⚠
- City of Colton ⚠
- City of Corcoran
- City of Corona
- City of Crescent City
- City of Cupertino
- City of Daly City
- City of Davis
- City of Delano
- City of Dinuba
- City of East Palo Alto
- City of El Centro
- City of Escondido
- City of Eureka
- City of Exeter
- City of Fairfield
- City of Farmersville
- City of Fortuna
- City of Fountain Valley
- City of Fresno ⚠
- City of Fullerton ⚠
- City of Galt
- City of Garden Grove ⚠
- City of Gilroy ⚠
- City of Greenfield
- City of Hanford
- City of Hayward
- City of Healdsburg
- City of Hemet
- City of Hollister
- City of Huntington Beach ⚠
- City of Imperial
- City of Kerman
- City of Kingsburg
- City of La Habra
- City of La Palma
- City of Lathrop ⚠
- City of Lemoore
- City of Lincoln ⚠
- City of Lindsay ⚠
- City of Livermore
- City of Livingston
- City of Lodi ⚠
- City of Loma Linda
- City of Los Banos
- City of Madera
- City of Manteca ⚠
- City of Martinez
- City of Mcfarland
- City of Mendota
- City of Merced ⚠
- City of Millbrae
- City of Milpitas
- City of Modesto ⚠
- City of Modesto - Salida
- City of Morgan Hill
- City of Mountain View
- City of Napa
- City of Newman-Water Department
- City of Newport Beach
- City of Norco ⚠
- City of Oakdale
- City of Oceanside
- City of Orange ⚠
- City of Palo Alto
- City of Parlier
- City of Patterson
- City of Petaluma
- City of Pittsburg
- City of Pleasanton ⚠
- City of Porterville ⚠
- City of Poway
- City of Red Bluff ⚠
- City of Redding ⚠
- City of Redwood City
- City of Reedley
- City of Rialto ⚠
- City of Ripon ⚠
- City of Riverbank
- City of Riverside
- City of Rohnert Park ⚠
- City of Roseville
- City of Sacramento Main ⚠
- City of San Bruno
- City of San Clemente
- City of San Diego
- City of San Jacinto
- City of San Jose - Evg/Edv/Coy
- City of San Jose - Nsj/Alviso
- City of San Juan Capistrano
- City of Sanger ⚠
- City of Santa Ana ⚠
- City of Santa Barbara Water Department
- City of Santa Clara
- City of Santa Rosa
- City of Seal Beach
- City of Shafter
- City of Shasta Lake
- City of Soledad
- City of Sonoma ⚠
- City of South Pasadena
- City of Stockton ⚠
- City of Sunnyvale
- City of Tracy
- City of Tulare
- City of Turlock
- City of Tustin ⚠
- City of Ukiah ⚠
- City of Upland
- City of Vacaville ⚠
- City of Vallejo
- City of Wasco
- City of Watsonville ⚠
- City of West Sacramento
- City of Westminster ⚠
- City of Woodland
- City of Yuba City
- Coachella Vwd: Cove Community
- Coachella Water Authority
- Coalinga-City
- Coastside County Water District
- Compton-City Water Dept. ⚠
- Contra Costa Water District
- Covina-City Water Dept.
- Crescenta Valley CWD ⚠
- Cucamonga Valley Water District
- Cws - Bakersfield ⚠
- Cws - North Garden ⚠
- Cws - Selma
- Cws - Visalia ⚠
- Cwsc King City
- Cwsc Los Altos Suburban
- Cwsc Salinas
- Desert Water Agency
- Diablo Water District
- Downey - City Water Dept. ⚠
- Dublin San Ramon Services District
- East Bay MUD
- East Niles Csd
- East Valley Water District ⚠
- Eastern Municipal WD
- Edwards Afb - Main Base
- El Dorado Id - Main
- El Monte-City Water Dept. ⚠
- El Segundo-City Water Dept.
- El Toro Water District
- Elk Grove Water Service
- Elsinore Valley MWD
- Estero Municipal Improvement District
- Fair Oaks Water District
- Fallbrook PUD
- Fillmore Water Dept
- Folsom City of - Main
- Glendale-City Water Dept. ⚠
- Glendora-City Water Dept.
- Golden State Water Co - Barstow ⚠
- Golden State Water Co. - Cordova
- Golden State Water Co. - Orcutt
- Golden State Water Company - Bay Point
- Golden State Water Company - Simi Valley
- Golden State Wc - Placentia/Yorba Linda ⚠
- Golden State Wc - West Orange County ⚠
- Goleta Water District
- Great Oaks Wc INC ⚠
- Greenfield County WD
- Grover Beach Water Department
- Gswc - Artesia ⚠
- Gswc - Bell Bell Gardens ⚠
- Gswc - Claremont ⚠
- Gswc - Culver City
- Gswc - Florence/Graham
- Gswc - Norwalk
- Gswc - Southwest
- GSWC - Willowbrook
- Gswc-San Dimas ⚠
- Gswc-South Arcadia ⚠
- Gswc-South San Gabriel
- Hawthorne-City Water Dept.
- Helix Water District
- Hesperia WD ⚠
- Hi Desert WD
- Humboldt C.S.D.
- Huntington Park-City Water Dept. ⚠
- Indian Wells Valley W.D.
- Indio Water Authority
- Inglewood- City Water Dept. ⚠
- Irvine Ranch Water District
- Jurupa Community Sd
- La Verne City WD
- Laguna Beach County WD
- Lake Hemet MWD
- Lakeside WD ⚠
- Lakewood - City Water Dept. ⚠
- Lamont Public Utility Dist
- Las Virgenes MWD
- Lemoore Naval Air Station
- Liberty Utilities - Bellflower-Norwalk ⚠
- Liberty Utilities - Compton
- Liberty Utilities - Lynwood ⚠
- Liberty Utilities (Av Ranchos) Corp.
- Lincoln Avenue Water Co.
- Linda County Water District
- Lomita-City Water Dept. ⚠
- Lompoc-City Water Utility Div
- Long Beach-City Water Dept.
- Los Angeles Cwwd 29 & 80-Malibu
- Los Angeles Cwwd 40 R 24 27 33-Pearblsm
- Los Angeles Cwwd 40 Reg 4 & 34-Lancaster
- Los Angeles Cwwd 40 Reg. 38-Lake La
- Los Angeles-City Dept. of Water & Power
- Lynwood-City Water Dept. ⚠
- Manhattan Beach-City Water Dept.
- Marin Municipal Water District
- Marina Coast Water District
- Mckinleyville C.S.D.
- Menlo Park Municipal Water
- Mesa Water District
- Mid-Peninsula Water District
- Mission Springs WD
- Monrovia-City Water Dept. ⚠
- Monte Vista CWD ⚠
- Montebello Land & Water Co. ⚠
- Montecito Water Dist
- Monterey Park-City Water Dept.
- Morro Bay Pw Dept - Water Division
- Moulton Niguel Water District
- Mountain House Community Services Dist.
- Muscoy Mwc No. 1
- Nevada Id - E. George Banner Mountain
- Nevada Id - Loma Rica
- Nipomo Comm Services Dist
- North Coast County Water Dist
- North Marin Water District
- Norwalk - City Water Dept. ⚠
- Nps Ggnra
- Oak Park Water Service
- Oildale Mwc
- Olivehurst Public U.D.
- Olivenhain MWD
- Ontario Municipal Utilities Company ⚠
- Orange Vale Water Company
- Orchard Dale Water District ⚠
- Otay Water District
- Oxnard Water Dept
- Padre Dam MWD
- Palmdale Water Dist.
- Paramount - City Water Dept.
- Pasadena-City Water Dept.
- Paso Robles Water Department ⚠
- Phelan Pinon Hills Csd
- Pico Rivera - City Water Dept. ⚠
- Pico WD ⚠
- Pinedale County Water District ⚠
- Placer Cwa - Auburn/Bowman
- Placer Cwa - Foothill
- Placerville City of - Main
- Pomona - City Water Dept. ⚠
- Port Hueneme Water Dept
- Quartz Hill Water Dist.
- Rainbow Municipal WD
- Ramona Municipal WD
- Rancho California Water District ⚠
- Redlands City MUD-Water Div ⚠
- Rincon Del Diablo MWD (Id-1)
- Rio Linda/Elverta Community Water Dist
- Riverside Highland Water Company ⚠
- Rosamond Csd
- Rowland Water District
- Rubidoux Community Sd
- Sacramento Suburban Water District
- San Bernardino City
- San Dieguito WD ⚠
- San Fernando-City Water Dept.
- San Francisco International Airport
- San Gabriel County WD
- San Gabriel Valley Water Co.-El Monte
- San Gabriel Valley Wc - Fontana
- San Jose Water ⚠
- San Juan Water District
- San Lorenzo Valley Water Dist
- San Luis Obispo Water Department
- Santa Clarita Valley W.A.-Newhall Div.
- Santa Clarita Valley W.A.-Santa Clarita ⚠
- Santa Clarita Valley W.A.-Valencia Divis ⚠
- Santa Cruz Water Department
- Santa Fe I.D.
- Santa Fe Springs - City Water Dept. ⚠
- Santa Margarita Water District
- Santa Maria Water Department
- Santa Monica-City Water Division ⚠
- Santa Paula Water System
- Sbdno County Service Area 64
- Sbndo County Service Area 70j
- Scotts Valley Water District
- Scwa - Arden Park Vista ⚠
- Scwa - Laguna/Vineyard ⚠
- Scwa Mather-Sunrise
- Sfpuc City Distribution Division
- Sfwp-Miners Ranch
- Sierra Madre-City Water Dept.
- Signal Hill - City Water Dept.
- Sonoma State University
- Soquel Creek Water District
- South Coast Water District
- South Gate-City Water Dept. ⚠
- South Tahoe PUD - Main ⚠
- Stanford University
- Suburban Water Systems - Whittier ⚠
- Suburban Water Systems-La Mirada ⚠
- Suburban Water Systems-San Jose
- Suisun-Solano Water Authority
- Sunny Slope Water Co.
- Sunnyslope County Water Dist ⚠
- Sweetwater Authority ⚠
- Tejon Castac WD - I5 & Laval Rd
- Temescal Valley Water District
- Thermalito Water & Sewer Dist ⚠
- Thousand Oaks Water Dept
- Torrance-City Water Dept.
- Town of Discovery Bay
- Town of Hillsborough
- Town of Windsor
- Trabuco Canyon Water District
- Tract 180 Mutual Water Co. ⚠
- Truckee-Donner PUD Main ⚠
- Tud - Sonora/Jamestown Water System
- Twentynine Palms Water District
- UC Davis
- Us Army Fort Irwin
- Usmc - 29 Palms
- Vallecitos WD
- Valley Center MWD
- Valley County Water Dist.
- Valley of the Moon Water District ⚠
- Valley Water Co.
- Vaughn Wc INC
- Ventura Cwwd No. 1 - Moorpark
- Ventura Water Department
- Ventura Wwd No. 8 - Simi Valley
- Vernon-City Water Dept.
- Victorville Water District
- Vista Irrigation District
- Walnut Park Mutual Water Co.
- Walnut Valley Water District
- West Kern Water District
- West Valley Water District
- Westborough County Water Dist
- Western MWD
- Western MWD - Murrieta Division ⚠
- Whittier-City Water Dept. ⚠
- Yorba Linda Water District
- Yucaipa Valley Water District ⚠
- American Valley Csd
- Armona Community Services Dist
- Arrowhead Villas Mutual Service Company
- Atascadero State Hospital ⚠
- Averydale Mwc
- Awa Buckhorn Plant
- Awa Ione
- Awa Tanner
- Bakman Water-Rolling Hills
- Bar-Len Mwc
- Bass Lake Water Company
- Beale Air Force Base
- Bear Valley Csd ⚠
- Bellflower Municipal Water System ⚠
- Blue Lake Springs Mut Wtr
- Bolinas Community PUD
- Borrego WD
- Brooktrails Township Csd
- Buellton Water Department
- Cabrillo College
- Cal Am - Meadowbrook ⚠
- Cal Am - Oakhurst
- Cal-Water Service Co.-Willows
- Calam - Arden ⚠
- Calam - West Placer
- Calaveras PUD
- California Rehabilitation Center - Norco
- California State Fair ⚠
- California State Prison - Solano
- California Water Service Co.-Lancaster
- California Water Service Co.-Travis Afb
- California-American Geyserville (Puc)
- California-American Larkfield (Puc)
- Calipatria State Prison
- Cambria Comm Services Dist
- Canada Woods Wc
- Castroville Community Services District
- Cci - Tehachapi
- Ccwd - Copper Cove
- Ccwd - Jenny Lind
- Cdcr-High Desert State Prison
- Centerville C.S.D.
- Centinela State Prison
- Channel Islands Beach Csd
- China Lake Naval Air Weapons Station
- Chuckawalla Valley State Prison
- City of Alturas
- City of Angels
- City of Bishop
- City of Blue Lake
- City of Blythe -
- City of Calistoga ⚠
- City of Cloverdale
- City of Colusa
- City of Corning
- City of Cotati
- City of Del Mar
- City of Dixon
- City of Dos Palos
- City of Escalon
- City of Fort Bragg
- City of Fowler
- City of Gonzales
- City of Grass Valley
- City of Gridley ⚠
- City of Gustine
- City of Holtville
- City of Hughson
- City of Huron
- City of Industry Waterworks Systems
- City of Jackson
- City of Lakeport
- City of Live Oak Ca
- City of Mt. Shasta
- City of Needles
- City of Orange Cove
- City of Orland
- City of Perris
- City of Rio Dell
- City of Rio Vista
- City of San Joaquin
- City of Sebastopol
- City of St. Helena
- City of Susanville
- City of Tehachapi
- City of Vallejo-Lakes System
- City of Waterford
- City of Wheatland ⚠
- City of Williams
- City of Willits
- City of Winters
- City of Woodlake
- City of Yreka
- Clear Creek Csd-Anderson
- Coachella Vwd: I.D. No. 8
- Commerce-City Water Dept. ⚠
- Correctional Training Facility - Soledad
- Cottonwood County Water Dist.
- Crestline Village CWD - Division 10 ⚠
- Csa 70 W-3 Hacienda
- Cutler PUD
- Cwsc Las Lomas
- Cwsc Oak Hills
- Cwsc Salinas Hills
- Del Paso Manor County Water Di
- Delhi CWD ⚠
- Denair Community Services District
- Earlimart PUD
- East Pasadena Water Co.
- Farm Mutual W.C. (the) ⚠
- Firebaugh City
- Florin County Water District ⚠
- Folsom City of - Ashland
- Folsom State Prison ⚠
- Foresthill Public Utility Dist
- Georgetown Divide PUD
- Glen Helen Water System
- Golden Hills Csd ⚠
- Golden State Water Co - Apple Vly South
- Golden State Water Co - Arden Water Serv
- Golden State Water Co - Wrightwood
- Golden State Water Co.-Clearlake System
- Golden State Water Company - Los Osos
- Golden State Water Company - Nipomo
- Golden State Wc - Cowan Heights
- Groveland Community Serv Dist ⚠
- Gswc - Hollydale
- Gswc-Calipatria
- Guadalupe Valley Mid ⚠
- Guadalupe Water Department
- Heber Public Utility District
- Helendale Community Service District ⚠
- Heritage Ranch Csd
- Hgst INC
- Hidden Valley Lake Csd
- Highlands Mutual Water Company
- Hilmar County Water District
- Imperial Valley College
- Ivanhoe Public Utility Dist
- Jackson Valley Irrigation District
- Joe's Travel Plaza (Eh)
- Joshua Basin Water District
- Kelseyville Co Waterworks District 3
- Kern Valley State Prison
- Keyes Community Services Dist.
- Kirkwood Meadows Public Utility District
- Konocti County Water District
- La Canada Irrigation Dist.
- La Cumbre Mutual Water Co
- La Habra Heights CWD ⚠
- La Puente Valley CWD
- Lake Almanor Country Club Mwc
- Lake Arrowhead Csd ⚠
- Lake of the Springs
- Lakeside Woods Mutual Water Co
- Las Flores Water Co.
- Laton Community Services District ⚠
- Lawrence Livermore National Lab Site 200
- Littlerock Creek Irrigation Dist.
- Loma Linda University ⚠
- Los Angeles Cwwd 36-Val Verde
- Los Angeles Cwwd 37-Acton
- Los Osos Community Services District ⚠
- Lucerne Water Co. - Cal Water Service
- Madera Valley Water Company
- Malaga County Water District
- Mammoth CWD
- Mammoth Mountain Ski Area - Outpost 14
- Maywood Mutual Water Co. #1 ⚠
- Maywood Mutual Water Co. #2 ⚠
- Maywood Mutual Water Co. #3 ⚠
- Meadow Vista CWD
- Meadows Union Elementary School
- Meiners Oaks CWD
- Mid Valley Ag
- Millview County Water District
- Mission Hills Csd
- Mojave PUD
- Montara Water and Sanitary District
- Montebello-City Water Dept.
- Mt. Konocti Mutual Water Company
- Myoma Dunes Mutual Water Company
- Nas North Island & Nab Coronado
- Nasa Ames Research Center
- Nevada Id - Lake of Pines
- Nevada Id - Lake Wildwood
- Nevada Id - North Auburn
- North Perris Water System
- North Tahoe PUD - Main
- Northrop Grumman Corp. ⚠
- Northstar C.S.D.
- Nuevo Water Company ⚠
- Oceano Comm Services Dist.
- Ojai Water System
- Olympia Mobilodge ⚠
- Orosi Public Utility District
- Pajaro Community Services District
- Palm Ranch Irrigation Dist.
- Paradise Irrigation District
- Patterson Tract Csd
- Peter Pitchess Honor Rancho Detn. Ctr ⚠
- Pismo Beach Water Department
- Planada Csd ⚠
- Pleasant Valley Mutual Water Co ⚠
- Plumas Lake
- Ponderosa Basin Mutual Wtr Co
- Porterville-Jones Corner
- Potrero Elementary School ⚠
- Presidio of San Francisco
- Purissima Hills Water District
- Rancheritos Mwc
- Rancho Los Amigos Hospital ⚠
- Rancho Murieta Community Servi
- Redwood Valley County Water District
- Riverside Csa #122-Mesa Verde
- Rodney Strong Vineyards
- Rubio Canon Land & Water Association ⚠
- Running Springs Water District ⚠
- Russian River County Water District
- Sacramento International Airport [sws]
- Salinas Valley State Prison
- San Antonio Water Company
- San Benito High School
- San Francisco Regional Water System
- San Gabriel Valley Water Co.-Montebello
- San Joaquin County - Lincoln Village
- San Joaquin County-Mokelumne Acres ⚠
- San Joaquin River Club INC
- Santa Ana River Water Company
- Santa Clarita Valley W.A.-Castaic Div.
- Santa Clarita Valley W.A.-Pinetree Div.
- Santa Clarita Valley W.A.-Tesoro Div.
- Santa Ynez River Water Cons. Dist. Id#1
- Sativa-L.A. CWD ⚠
- Sea Ranch Water Company the (Puc)
- Serrano Water District
- Sheep Creek Water Company
- Sierra Tahoe Main Lodge ⚠
- Slvwd - Felton Water System
- So. Cal. Edison Co.-Santa Catalina
- Solvang Water Division
- South Mesa Wc
- South Montebello Irrigation Dist. ⚠
- South Shore Recreation Area
- Squaw Valley 8200 Water System
- Stallion Springs Csd
- Storer Transportation
- Suburban Water Systems-Glendora
- Sweetwater Springs CWD - Guerneville
- Tahoe City PUD - Main
- Templeton Csd
- Terra Bella Irrigation District - Tbt
- Thousand Trails San Benito Preserve
- Tipton Community Services Dist
- Town of Yountville
- Tract 349 Mutual Water Co. ⚠
- Trout Gulch Mutual Water Company
- Tud - Columbia Water System
- Tud - Upper Basin Water System
- Tud-Wards Ferry Ranches
- Union Public Utility District
- Valencia Heights Water Co. ⚠
- Valley View Mutual Water Co.
- Vandenberg Village Comm. Serv. Dist.
- Ventura River Water District
- Wasco St. Prison Reception Ctr
- Weaverville C.S.D. ⚠
- Western Heights Water Company
- Whale Gulch Elementary School
- Willow County Water District
- Wine Country Apartments
- Winton Water & Sanitary Dist
- Yosemite Spring Park Util Co ⚠
Questions
Does California tap water have PFAS?
In EPA's UCMR 5 testing, 239 of 707 California water systems (34%) had at least one PFAS compound detected, and 166 had PFOA or PFOS above EPA's 4 ppt limit.
What is the best water filter in California?
It depends on your utility. Where PFAS is above EPA's limit, reverse osmosis is the most effective option. Where the main concern is lead from home plumbing or chlorine taste, a certified carbon filter is enough. Enter your address to get a match.