PFAS in California tap water

166 of 707 tested systems measured above the federal limit. 239 had a detection of any kind.

Every public water system below was required by the EPA to test for 29 PFAS compounds. Sorted by the highest PFOA or PFOS reading, worst first. Find yours for the full set of readings and what removes them.

Water systemHighest PFOAHighest PFOSFoundAgainst the 4 ppt limit
Running Springs Water District15.9 ppt236.5 ppt10 of 29Above
Potrero Elementary School188.3 ppt64.2 ppt9 of 29Above
Liberty Utilities - Bellflower-norwalk16 ppt59 ppt8 of 29Above
Montebello Land & Water Co.16 ppt53 ppt8 of 29Above
City of Atwater33 ppt45 ppt10 of 29Above
Downey - City, Water Dept.15 ppt44 ppt8 of 29Above
City of Sacramento Main17.3 ppt41.4 ppt8 of 29Above
City of Clovis18 ppt41 ppt10 of 29Above
Tract 349 Mutual Water Co.8.2 ppt36.5 ppt4 of 29Above
Atascadero State Hospitalnone detected33 ppt5 of 29Above
Bellflower Municipal Water System7.6 ppt32.6 ppt4 of 29Above
Norco, City of13.7 ppt31.4 ppt7 of 29Above
City of Fresno16 ppt30 ppt10 of 29Above
Ontario Municipal Utilities Company30 ppt5.2 ppt6 of 29Above
Pico Rivera - City, Water Dept.16 ppt30 ppt9 of 29Above
City of Anaheim10.1 ppt29 ppt7 of 29Above
City of Stockton6.7 ppt28 ppt3 of 29Above
Pico Wd14 ppt28 ppt9 of 29Above
Maywood Mutual Water Co. #37.3 ppt26.4 ppt3 of 29Above
Rancho Los Amigos Hospital7.8 ppt26.2 ppt3 of 29Above
City of Pleasanton5.1 ppt26 ppt8 of 29Above
Modesto, City of8.6 ppt26 ppt7 of 29Above
Norwalk - City, Water Dept.5.2 ppt26 ppt5 of 29Above
South Gate-city, Water Dept.10 ppt26 ppt6 of 29Above
Ceres, City of12 ppt24 ppt7 of 29Above
Scwa - Laguna/vineyard14 ppt24 ppt7 of 29Above
Tract 180 Mutual Water Co.6.5 ppt24 ppt4 of 29Above
City of Bell Gardens14 ppt23 ppt7 of 29Above
Helendale Community Service District13 ppt23 ppt7 of 29Above
Huntington Park-city, Water Dept.5.1 ppt23 ppt3 of 29Above
La Habra Heights Cwd11 ppt23 ppt7 of 29Above
Lynwood-city, Water Dept.7.8 ppt23 ppt4 of 29Above
Orchard Dale Water District9.9 ppt23 ppt7 of 29Above
Porterville, City of22 ppt23 ppt8 of 29Above
Cal-water Service Co.-chico6.8 ppt22.5 ppt6 of 29Above
Atascadero Mutual Water Co8.4 ppt22.3 ppt5 of 29Above
Gswc-south Arcadia5.5 ppt22 ppt3 of 29Above
Santa Clarita Valley W.a.-santa Clarita20.5 ppt17.8 ppt8 of 29Above
South Montebello Irrigation Dist.8.2 ppt20.1 ppt6 of 29Above
City of Garden Grove8.1 ppt19 ppt6 of 29Above
Riverside Highland Water Company18 ppt19 ppt9 of 29Above
Rubio Canon Land & Water Association8.5 ppt19 ppt7 of 29Above
Weaverville C.s.d.none detected19 ppt2 of 29Above
Whittier-city, Water Dept.7.5 ppt19 ppt6 of 29Above
Golden Hills Csd18.6 ppt7.8 ppt7 of 29Above
Lakewood - City, Water Dept.none detected18.5 ppt2 of 29Above
Colton, City of5.9 ppt18 ppt6 of 29Above
Pomona - City, Water Dept.7.1 ppt18 ppt6 of 29Above
Bellflower - Somerset Mwcnone detected17 ppt2 of 29Above
Camrosa Water Districtnone detected17 ppt2 of 29Above
City of Lathropnone detected17 ppt3 of 29Above
City of Orange9.3 ppt17 ppt7 of 29Above
Compton-city, Water Dept.4.9 ppt17 ppt3 of 29Above
Liberty Utilities - Lynwood5 ppt17 ppt3 of 29Above
Santa Clarita Valley W.a.-valencia Divis16.9 ppt7.5 ppt8 of 29Above
City of Redding16.2 ppt12.6 ppt7 of 29Above
Golden State Wc - West Orange County8.1 ppt16 ppt5 of 29Above
Rancho California Water District11 ppt16 ppt8 of 29Above
Suburban Water Systems-la Mirada7 ppt16 ppt6 of 29Above
Glendale-city, Water Dept.14.8 ppt15.8 ppt8 of 29Above
Gswc - Bell, Bell Gardensnone detected15 ppt6 of 29Above
Calam - Parkway4.3 ppt14.7 ppt6 of 29Above
Los Osos Community Services District14.7 ppt11.7 ppt8 of 29Above
Planada Csdnone detected14.7 ppt3 of 29Above
City of Santa Ana8.9 ppt14.2 ppt5 of 29Above
California State Fairnone detected14 ppt2 of 29Above
Cws - Bakersfield9.1 ppt14 ppt7 of 29Above
Lake Arrowhead Csd14 ppt7.2 ppt8 of 29Above
Santa Fe Springs - City, Water Dept.6.9 ppt14 ppt5 of 29Above
San Joaquin County-mokelumne Acres8.3 ppt13.5 ppt6 of 29Above
Cal Am - Suburban Rosemont8.2 ppt13.4 ppt7 of 29Above
City of Fullerton10.8 ppt13.3 ppt8 of 29Above
Gswc - Artesianone detected13 ppt2 of 29Above
Suburban Water Systems - Whittier6.3 ppt13 ppt6 of 29Above
Gswc - Claremont12.9 ppt10.4 ppt7 of 29Above
Calistoga, City of6.4 ppt12.2 ppt4 of 29Above
California State University Fresno12 pptnone detected6 of 29Above
California Water Service - Livermore4.8 ppt12 ppt6 of 29Above
East Valley Water District9 ppt12 ppt7 of 29Above
Lindsay, City of9.2 ppt12 ppt4 of 29Above
Pinedale County Water District12 ppt8.8 ppt8 of 29Above
Ripon, City of5.2 ppt12 ppt3 of 29Above
Florin County Water District11.8 ppt6.6 ppt6 of 29Above
Sweetwater Authority11.4 ppt5.7 ppt8 of 29Above
Maywood Mutual Water Co. #1none detected11.3 ppt1 of 29Above
Hesperia Wd10.2 ppt11.1 ppt7 of 29Above
City of Wheatlandnone detected11 ppt2 of 29Above
Pleasant Valley Mutual Water Co10.1 ppt11 ppt5 of 29Above
City of Gridleynone detected10.5 ppt6 of 29Above
City of Arcadianone detected10 ppt2 of 29Above
City of Vacaville5.1 ppt10 ppt4 of 29Above
Big Bear City Csd4.5 ppt9.9 ppt8 of 29Above
Guadalupe Valley Mid9.6 ppt8.3 ppt6 of 29Above
Sativa-l.a. Cwdnone detected9.4 ppt2 of 29Above
Commerce-city, Water Dept.9.3 pptnone detected6 of 29Above
City of Merced6.1 ppt8.9 ppt4 of 29Above
California Water Service Co. - Elanone detected8.6 ppt5 of 29Above
Bakersfield, City ofnone detected8.4 ppt3 of 29Above
Cal Am - Meadowbrooknone detected8.3 ppt1 of 29Above
Scwa - Arden Park Vista5.5 ppt8.3 ppt3 of 29Above
Cal Am Water Company - Monterey8.1 ppt7.3 ppt8 of 29Above
City of Gilroy8 ppt5.8 ppt7 of 29Above
Yosemite Spring Park Util Co7.5 ppt7.9 ppt6 of 29Above
Azusa Light and Water7.7 ppt5.8 ppt3 of 29Above
City of Red Bluff7.4 pptnone detected4 of 29Above
Ukiah, City of6.9 ppt7.4 ppt9 of 29Above
Delhi Cwdnone detected7.3 ppt2 of 29Above
Rialto, City of7.3 pptnone detected7 of 29Above
Manteca, City of7 pptnone detected4 of 29Above
Nuevo Water Company7 ppt4.6 ppt5 of 29Above
Cws - Visalia4.2 ppt6.9 ppt6 of 29Above
Arroyo Grande, Water Department5.8 ppt6.8 ppt6 of 29Above
City of Buena Parknone detected6.8 ppt2 of 29Above
Folsom State Prisonnone detected6.8 ppt1 of 29Above
City of Sanger5.6 ppt6.7 ppt4 of 29Above
Golden State Wc - Placentia/yorba Linda6 ppt6.5 ppt7 of 29Above
Peter Pitchess Honor Rancho Detn. Ctr5 ppt6.5 ppt3 of 29Above
Watsonville, City of6.5 ppt5.1 ppt6 of 29Above
Paso Robles Water Department6.3 pptnone detected7 of 29Above
Laton Community Services District6.2 ppt6.1 ppt3 of 29Above
Lodi, City of6.2 ppt5.6 ppt7 of 29Above
San Jose Waternone detected6.2 ppt2 of 29Above
Sonoma, City of6.2 pptnone detected2 of 29Above
Big Bear Lake Dwp - Big Bear System5.5 ppt6.1 ppt4 of 29Above
City of Huntington Beachnone detected6.1 ppt2 of 29Above
Monrovia-city, Water Dept.5.4 ppt6.1 ppt6 of 29Above
South Tahoe Pud - Main6.1 ppt5.2 ppt8 of 29Above
Calam - Arden6 ppt6 ppt5 of 29Above
Redlands City Mud-water Div4.3 ppt5.8 ppt3 of 29Above
Sunnyslope County Water Dist5.8 ppt5.1 ppt4 of 29Above
Bear Valley Csd5.7 pptnone detected1 of 29Above
Golden State Water Co - Barstow5.7 pptnone detected4 of 29Above
Valencia Heights Water Co.5.7 ppt4.4 ppt6 of 29Above
Western Mwd - Murrieta Division5.5 ppt5.7 ppt3 of 29Above
Monte Vista Cwdnone detected5.6 ppt5 of 29Above
Northrop Grumman Corp.5.5 pptnone detected8 of 29Above
Valley of the Moon Water District5.2 ppt5.4 ppt6 of 29Above
City of Westminsternone detected5.3 ppt2 of 29Above
California Water Service - Stocktonnone detected5.2 ppt1 of 29Above
Crestline Village Cwd - Division 104.5 ppt5.2 ppt7 of 29Above
Cal-am Water Company - Duartenone detected5.1 ppt1 of 29Above
Crescenta Valley Cwd5.1 pptnone detected6 of 29Above
Sierra Tahoe Main Lodge5 pptnone detected2 of 29Above
Groveland Community Serv Distnone detected4.9 ppt2 of 29Above
Cerritos - City, Water Dept.none detected4.8 ppt1 of 29Above
Lakeside Wdnone detected4.8 ppt3 of 29Above
Cws - North Gardennone detected4.6 ppt1 of 29Above
Great Oaks Wc Incnone detected4.6 ppt4 of 29Above
Gswc-san Dimasnone detected4.6 ppt2 of 29Above
Santa Monica-city, Water Division4.6 pptnone detected6 of 29Above
Thermalito Water & Sewer Distnone detected4.6 ppt1 of 29Above
Truckee-donner Pud, Main4.6 pptnone detected3 of 29Above
Adelanto, City ofnone detected4.5 ppt2 of 29Above
Chowchilla City Water Dept4.5 pptnone detected1 of 29Above
Rohnert Park, City ofnone detected4.5 ppt3 of 29Above
El Monte-city, Water Dept.none detected4.4 ppt2 of 29Above
Inglewood- City, Water Dept.4.4 pptnone detected1 of 29Above
City of Lincolnnone detected4.3 ppt2 of 29Above
Farm Mutual W.c. (the)4.2 ppt4.3 ppt5 of 29Above
Lomita-city, Water Dept.none detected4.3 ppt2 of 29Above
Maywood Mutual Water Co. #2none detected4.3 ppt1 of 29Above
San Dieguito Wd4.3 pptnone detected4 of 29Above
City of Tustinnone detected4.2 ppt3 of 29Above
Loma Linda Universitynone detected4.2 ppt2 of 29Above
Olympia Mobilodge4.2 pptnone detected5 of 29Above
Yucaipa Valley Water District4.2 pptnone detected4 of 29Above
Presidio of San Francisco4 pptnone detected7 of 29Within
Riverside, City ofnone detected4 ppt3 of 29Within
Alameda County Water Districtnone detectednone detected0 of 29Within
Alco Water Servicenone detectednone detected0 of 29Within
American Canyon, City ofnone detectednone detected0 of 29Within
American Valley Csdnone detectednone detected1 of 29Within
American Water O&m, Llc - Vafbnone detectednone detected0 of 29Within
Angels, City ofnone detectednone detected0 of 29Within
Arcata, City ofnone detectednone detected0 of 29Within
Armona Community Services Distnone detectednone detected0 of 29Within
Arrowhead Villas Mutual Service Companynone detectednone detected0 of 29Within
Arvin Community Services Distnone detectednone detected0 of 29Within
Avenal, City ofnone detectednone detected0 of 29Within
Averydale Mwcnone detectednone detected0 of 29Within
Awa Buckhorn Plantnone detectednone detected0 of 29Within
Awa, Ionenone detectednone detected0 of 29Within
Awa, Tannernone detectednone detected0 of 29Within
Bakman Water Companynone detectednone detected0 of 29Within
Bakman Water-rolling Hillsnone detectednone detected0 of 29Within
Banning, City ofnone detectednone detected1 of 29Within
Bar-len Mwcnone detectednone detected0 of 29Within
Bass Lake Water Companynone detectednone detected1 of 29Within
Beale Air Force Basenone detectednone detected0 of 29Within
Beaumont Cherry Valley Wdnone detectednone detected0 of 29Within
Bella Vista Water Districtnone detectednone detected0 of 29Within
Beverly Hills-city, Water Dept.none detectednone detected0 of 29Within
Bishop, City ofnone detectednone detected0 of 29Within
Blue Lake Springs Mut Wtrnone detectednone detected0 of 29Within
Blue Lake, City ofnone detectednone detected0 of 29Within
Blythe - City ofnone detectednone detected0 of 29Within
Bolinas Community Pudnone detectednone detected0 of 29Within
Borrego Wdnone detectednone detected0 of 29Within
Brawley, City ofnone detectednone detected0 of 29Within
Brentwoodnone detectednone detected0 of 29Within
Brooktrails Township Csdnone detectednone detected0 of 29Within
Buellton Water Departmentnone detectednone detected0 of 29Within
Burbank-city, Water Dept.none detectednone detected3 of 29Within
Butte-glenn Community College Distnone detectednone detected0 of 29Within
Cabrillo Collegenone detectednone detected0 of 29Within
Cal Am - Fruitridge Vistanone detectednone detected0 of 29Within
Cal Am - Oakhurstnone detectednone detected0 of 29Within
Cal American Water Conone detectednone detected0 of 29Within
Cal-am Water Coronadonone detectednone detected0 of 29Within
Cal-water Service Co.-marysvillenone detectednone detected0 of 29Within
Cal-water Service Co.-orovillenone detectednone detected1 of 29Within
Cal-water Service Co.-willowsnone detectednone detected0 of 29Within
Cal/am Water Company - Baldwin Hillsnone detectednone detected0 of 29Within
Cal/am Water Company - San Marinonone detectednone detected1 of 29Within
Calam - Antelopenone detectednone detected0 of 29Within
Calam - Lincoln Oaksnone detectednone detected1 of 29Within
Calam - West Placernone detectednone detected0 of 29Within
Calaveras Pudnone detectednone detected0 of 29Within
Calexico, City ofnone detectednone detected0 of 29Within
Calif State Polytechnical Univ - Pomonanone detectednone detected4 of 29Within
California City, City ofnone detectednone detected0 of 29Within
California Institution for Mennone detectednone detected0 of 29Within
California Mens Colonynone detectednone detected0 of 29Within
California Rehabilitation Center - Norconone detectednone detected1 of 29Within
California State Prison - Solanonone detectednone detected0 of 29Within
California Water Service - Bear Gulchnone detectednone detected0 of 29Within
California Water Service - San Carlosnone detectednone detected0 of 29Within
California Water Service - San Mateonone detectednone detected0 of 29Within
California Water Service Co - Westlakenone detectednone detected0 of 29Within
California Water Service Co. - Dixonnone detectednone detected0 of 29Within
California Water Service Co. - Domingueznone detectednone detected1 of 29Within
California Water Service Co. - Herm/redonone detectednone detected0 of 29Within
California Water Service Co. - Palos Vernone detectednone detected0 of 29Within
California Water Service Co.-lancasternone detectednone detected0 of 29Within
California Water Service Co.-travis Afbnone detectednone detected0 of 29Within
California Water Service-s San Francisconone detectednone detected0 of 29Within
California-american Geyserville (puc)none detectednone detected0 of 29Within
California-american Larkfield (puc)none detectednone detected0 of 29Within
Calipatria State Prisonnone detectednone detected0 of 29Within
Camarillo Water Deptnone detectednone detected0 of 29Within
Cambria Comm Services Distnone detectednone detected0 of 29Within
Camp Pendleton (north)none detectednone detected1 of 29Within
Camp Pendleton (south)none detectednone detected2 of 29Within
Canada Woods Wcnone detectednone detected0 of 29Within
Carlsbad Mwdnone detectednone detected0 of 29Within
Carmichael Water Districtnone detectednone detected2 of 29Within
Carpinteria Valley Water Districtnone detectednone detected0 of 29Within
Casitas Municipal Water Distnone detectednone detected0 of 29Within
Castroville Community Services Districtnone detectednone detected0 of 29Within
Cci - Tehachapinone detectednone detected0 of 29Within
Ccwd - Copper Covenone detectednone detected0 of 29Within
Ccwd - Ebbetts Passnone detectednone detected0 of 29Within
Ccwd - Jenny Lindnone detectednone detected0 of 29Within
Cdcr-high Desert State Prisonnone detectednone detected0 of 29Within
Centerville C.s.d.none detectednone detected0 of 29Within
Centinela State Prisonnone detectednone detected0 of 29Within
Channel Islands Beach Csdnone detectednone detected0 of 29Within
China Lake Naval Air Weapons Stationnone detectednone detected0 of 29Within
Chino Hills, City ofnone detectednone detected0 of 29Within
Chino, City ofnone detectednone detected0 of 29Within
Chuckawalla Valley State Prisonnone detectednone detected0 of 29Within
Citrus Heights Water Districtnone detectednone detected0 of 29Within
City of Alhambranone detectednone detected0 of 29Within
City of Alturasnone detectednone detected1 of 29Within
City of Andersonnone detectednone detected0 of 4Within
City of Antiochnone detectednone detected0 of 29Within
City of Benicianone detectednone detected3 of 29Within
City of Breanone detectednone detected0 of 29Within
City of Burlingamenone detectednone detected0 of 29Within
City of Colusanone detectednone detected0 of 29Within
City of Corningnone detectednone detected0 of 29Within
City of Crescent Citynone detectednone detected0 of 29Within
City of Cupertinonone detectednone detected0 of 29Within
City of Daly Citynone detectednone detected0 of 29Within
City of Davisnone detectednone detected0 of 29Within
City of Dixonnone detectednone detected0 of 29Within
City of Dos Palosnone detectednone detected0 of 29Within
City of East Palo Altonone detectednone detected0 of 29Within
City of Fairfieldnone detectednone detected0 of 29Within
City of Fountain Valleynone detectednone detected1 of 29Within
City of Fowlernone detectednone detected1 of 29Within
City of Grass Valleynone detectednone detected0 of 29Within
City of Gustinenone detectednone detected0 of 29Within
City of Haywardnone detectednone detected0 of 29Within
City of Industry Waterworks Systemsnone detectednone detected0 of 29Within
City of Jacksonnone detectednone detected0 of 29Within
City of la Habranone detectednone detected0 of 29Within
City of la Palmanone detectednone detected0 of 29Within
City of Live Oak, Canone detectednone detected2 of 29Within
City of Livermorenone detectednone detected0 of 29Within
City of Livingstonnone detectednone detected0 of 29Within
City of Los Banosnone detectednone detected0 of 29Within
City of Maderanone detectednone detected0 of 29Within
City of Martineznone detectednone detected0 of 29Within
City of Millbraenone detectednone detected0 of 29Within
City of Milpitasnone detectednone detected0 of 29Within
City of Modesto - Salidanone detectednone detected0 of 29Within
City of Morgan Hillnone detectednone detected3 of 29Within
City of Mountain Viewnone detectednone detected0 of 29Within
City of Newman-water Departmentnone detectednone detected0 of 29Within
City of Newport Beachnone detectednone detected0 of 29Within
City of Orange Covenone detectednone detected0 of 29Within
City of Orlandnone detectednone detected0 of 29Within
City of Palo Altonone detectednone detected0 of 29Within
City of Parliernone detectednone detected0 of 29Within
City of Pittsburgnone detectednone detected0 of 29Within
City of Redwood Citynone detectednone detected0 of 29Within
City of Rio Vistanone detectednone detected0 of 29Within
City of Rosevillenone detectednone detected0 of 29Within
City of San Brunonone detectednone detected0 of 29Within
City of San Clementenone detectednone detected0 of 29Within
City of San Jose - Evg/edv/coynone detectednone detected0 of 29Within
City of San Jose - Nsj/alvisonone detectednone detected0 of 29Within
City of San Juan Capistranonone detectednone detected0 of 29Within
City of Santa Barbara Water Departmentnone detectednone detected0 of 29Within
City of Santa Claranone detectednone detected0 of 29Within
City of Seal Beachnone detectednone detected0 of 29Within
City of Shasta Lakenone detectednone detected0 of 29Within
City of South Pasadenanone detectednone detected0 of 29Within
City of Sunnyvalenone detectednone detected0 of 29Within
City of Susanvillenone detectednone detected0 of 29Within
City of Vallejonone detectednone detected0 of 29Within
City of Vallejo-lakes Systemnone detectednone detected0 of 29Within
City of Waterfordnone detectednone detected0 of 29Within
City of West Sacramentonone detectednone detected0 of 29Within
City of Williamsnone detectednone detected0 of 29Within
City of Wintersnone detectednone detected1 of 29Within
City of Woodlandnone detectednone detected0 of 29Within
City of Yuba Citynone detectednone detected0 of 29Within
Clear Creek Csd-andersonnone detectednone detected0 of 29Within
Cloverdale, City ofnone detectednone detected0 of 29Within
Coachella Vwd: Cove Communitynone detectednone detected0 of 29Within
Coachella Vwd: I.d. No. 8none detectednone detected0 of 29Within
Coachella Water Authoritynone detectednone detected0 of 29Within
Coalinga-citynone detectednone detected0 of 29Within
Coastside County Water Districtnone detectednone detected0 of 29Within
Contra Costa Water Districtnone detectednone detected0 of 29Within
Corcoran, City ofnone detectednone detected0 of 29Within
Corona, City ofnone detectednone detected4 of 29Within
Correctional Training Facility - Soledadnone detectednone detected0 of 29Within
Cotati, City ofnone detectednone detected0 of 29Within
Cottonwood County Water Dist.none detectednone detected0 of 29Within
Covina-city, Water Dept.none detectednone detected0 of 29Within
Csa 70 W-3 Haciendanone detectednone detected0 of 29Within
Cucamonga Valley Water Districtnone detectednone detected0 of 29Within
Cutler Pudnone detectednone detected0 of 29Within
Cws - Selmanone detectednone detected0 of 29Within
Cwsc King Citynone detectednone detected0 of 29Within
Cwsc Las Lomasnone detectednone detected0 of 29Within
Cwsc Los Altos Suburbannone detectednone detected1 of 29Within
Cwsc Oak Hillsnone detectednone detected0 of 29Within
Cwsc Salinasnone detectednone detected0 of 29Within
Cwsc Salinas Hillsnone detectednone detected0 of 29Within
Del Mar, City ofnone detectednone detected0 of 29Within
Del Paso Manor County Water Dinone detectednone detected0 of 29Within
Delano, City ofnone detectednone detected0 of 29Within
Denair Community Services Districtnone detectednone detected0 of 29Within
Desert Water Agencynone detectednone detected0 of 29Within
Diablo Water Districtnone detectednone detected0 of 29Within
Dinuba, City ofnone detectednone detected0 of 29Within
Dublin San Ramon Services Districtnone detectednone detected0 of 29Within
Earlimart Pudnone detectednone detected0 of 29Within
East Bay Mudnone detectednone detected2 of 29Within
East Niles Csdnone detectednone detected0 of 29Within
East Pasadena Water Co.none detectednone detected0 of 29Within
Eastern Municipal Wdnone detectednone detected0 of 29Within
Edwards Afb - Main Basenone detectednone detected0 of 29Within
El Centro, City ofnone detectednone detected0 of 29Within
El Dorado Id - Mainnone detectednone detected1 of 29Within
El Segundo-city, Water Dept.none detectednone detected0 of 29Within
El Toro Water Districtnone detectednone detected1 of 29Within
Elk Grove Water Servicenone detectednone detected2 of 29Within
Elsinore Valley Mwdnone detectednone detected1 of 29Within
Escalon, City ofnone detectednone detected0 of 29Within
Escondido, City ofnone detectednone detected0 of 29Within
Estero Municipal Improvement Districtnone detectednone detected0 of 29Within
Eureka, City ofnone detectednone detected0 of 29Within
Exeter, City ofnone detectednone detected0 of 29Within
Fair Oaks Water Districtnone detectednone detected0 of 29Within
Fallbrook Pudnone detectednone detected0 of 29Within
Farmersville, City ofnone detectednone detected0 of 29Within
Fillmore Water Deptnone detectednone detected0 of 29Within
Firebaugh Citynone detectednone detected0 of 29Within
Folsom, City of - Ashlandnone detectednone detected0 of 29Within
Folsom, City of - Mainnone detectednone detected0 of 29Within
Foresthill Public Utility Distnone detectednone detected0 of 29Within
Fort Bragg, City ofnone detectednone detected0 of 29Within
Fortuna, City ofnone detectednone detected0 of 29Within
Galt, City ofnone detectednone detected0 of 29Within
Georgetown Divide Pudnone detectednone detected0 of 29Within
Glen Helen Water Systemnone detectednone detected4 of 29Within
Glendora-city, Water Dept.none detectednone detected0 of 29Within
Golden State Water Co - Apple Vly Southnone detectednone detected0 of 29Within
Golden State Water Co - Arden Water Servnone detectednone detected0 of 29Within
Golden State Water Co - Wrightwoodnone detectednone detected1 of 29Within
Golden State Water Co. - Cordovanone detectednone detected0 of 29Within
Golden State Water Co. - Orcuttnone detectednone detected0 of 29Within
Golden State Water Co.-clearlake Systemnone detectednone detected0 of 29Within
Golden State Water Company - Bay Pointnone detectednone detected0 of 29Within
Golden State Water Company - Los Ososnone detectednone detected4 of 29Within
Golden State Water Company - Nipomonone detectednone detected1 of 29Within
Golden State Water Company - Simi Valleynone detectednone detected0 of 29Within
Golden State Wc - Cowan Heightsnone detectednone detected2 of 29Within
Goleta Water Districtnone detectednone detected2 of 29Within
Gonzales, City ofnone detectednone detected0 of 29Within
Greenfield County Wdnone detectednone detected0 of 29Within
Greenfield, City ofnone detectednone detected0 of 29Within
Grover Beach Water Departmentnone detectednone detected0 of 29Within
Gswc - Culver Citynone detectednone detected0 of 29Within
Gswc - Florence/grahamnone detectednone detected0 of 29Within
Gswc - Hollydalenone detectednone detected1 of 29Within
Gswc - Norwalknone detectednone detected3 of 29Within
Gswc - Southwestnone detectednone detected0 of 29Within
GSWC - Willowbrooknone detectednone detected0 of 29Within
Gswc-calipatrianone detectednone detected0 of 29Within
Gswc-south San Gabrielnone detectednone detected1 of 29Within
Guadalupe Water Departmentnone detectednone detected0 of 29Within
Hanford, City ofnone detectednone detected0 of 29Within
Hawthorne-city Water Dept.none detectednone detected0 of 29Within
Healdsburg, City ofnone detectednone detected3 of 29Within
Heber Public Utility Districtnone detectednone detected0 of 29Within
Helix Water Districtnone detectednone detected0 of 29Within
Hemet, City ofnone detectednone detected0 of 29Within
Heritage Ranch Csdnone detectednone detected0 of 29Within
Hgst Incnone detectednone detected0 of 29Within
Hi Desert Wdnone detectednone detected3 of 29Within
Hidden Valley Lake Csdnone detectednone detected0 of 29Within
Highlands Mutual Water Companynone detectednone detected0 of 29Within
Hilmar County Water Districtnone detectednone detected0 of 29Within
Hollister, City ofnone detectednone detected0 of 29Within
Holtville, City ofnone detectednone detected0 of 29Within
Hughson, City ofnone detectednone detected0 of 29Within
Humboldt C.s.d.none detectednone detected0 of 29Within
Huron, City ofnone detectednone detected0 of 29Within
Imperial Valley Collegenone detectednone detected0 of 29Within
Imperial, City ofnone detectednone detected0 of 29Within
Indian Wells Valley W.d.none detectednone detected0 of 29Within
Indio Water Authoritynone detectednone detected0 of 29Within
Irvine Ranch Water Districtnone detectednone detected2 of 29Within
Ivanhoe Public Utility Distnone detectednone detected0 of 29Within
Jackson Valley Irrigation Districtnone detectednone detected0 of 29Within
Joe's Travel Plaza (eh)none detectednone detected0 of 29Within
Joshua Basin Water Districtnone detectednone detected0 of 29Within
Jurupa Community Sdnone detectednone detected0 of 29Within
Kelseyville Co Waterworks District 3none detectednone detected0 of 29Within
Kerman, City ofnone detectednone detected0 of 29Within
Kern Valley State Prisonnone detectednone detected0 of 29Within
Keyes Community Services Dist.none detectednone detected0 of 29Within
Kingsburg, City ofnone detectednone detected0 of 29Within
Kirkwood Meadows Public Utility Districtnone detectednone detected1 of 29Within
Konocti County Water Districtnone detectednone detected2 of 29Within
La Canada Irrigation Dist.none detectednone detected0 of 29Within
La Cumbre Mutual Water Conone detectednone detected0 of 29Within
La Puente Valley Cwdnone detectednone detected0 of 29Within
La Verne, City Wdnone detectednone detected0 of 29Within
Laguna Beach County Wdnone detectednone detected0 of 29Within
Lake Almanor Country Club Mwcnone detectednone detected0 of 29Within
Lake Hemet Mwdnone detectednone detected0 of 29Within
Lake of the Springsnone detectednone detected0 of 29Within
Lakeport, City ofnone detectednone detected0 of 29Within
Lakeside Woods Mutual Water Conone detectednone detected0 of 29Within
Lamont Public Utility Distnone detectednone detected0 of 29Within
Las Flores Water Co.none detectednone detected0 of 29Within
Las Virgenes Mwdnone detectednone detected0 of 29Within
Lawrence Livermore National Lab Site 200none detectednone detected0 of 29Within
Lemoore Naval Air Stationnone detectednone detected0 of 29Within
Lemoore, City ofnone detectednone detected0 of 29Within
Liberty Utilities - Comptonnone detectednone detected0 of 29Within
Liberty Utilities (av Ranchos) Corp.none detectednone detected0 of 29Within
Lincoln Avenue Water Co.none detectednone detected0 of 29Within
Linda County Water Districtnone detectednone detected0 of 29Within
Littlerock Creek Irrigation Dist.none detectednone detected0 of 29Within
Loma Linda, City ofnone detectednone detected0 of 29Within
Lompoc-city Water Utility Divnone detectednone detected0 of 29Within
Long Beach-city, Water Dept.none detectednone detected0 of 29Within
Los Angeles Cwwd 29 & 80-MALIBUnone detectednone detected0 of 29Within
Los Angeles Cwwd 36-VAL Verdenone detectednone detected0 of 29Within
Los Angeles Cwwd 37-ACTONnone detectednone detected0 of 29Within
Los Angeles Cwwd 40, R 24,27,33-PEARBLSMnone detectednone detected0 of 4Within
Los Angeles Cwwd 40, Reg. 38-LAKE lanone detectednone detected0 of 29Within
Los Angeles Cwwd 40,REG 4 & 34-LANCASTERnone detectednone detected0 of 29Within
Los Angeles-city, Dept. of Water & Powernone detectednone detected0 of 29Within
Lucerne Water Co. - Cal Water Servicenone detectednone detected0 of 29Within
Madera Valley Water Companynone detectednone detected0 of 29Within
Malaga County Water Districtnone detectednone detected0 of 29Within
Mammoth Cwdnone detectednone detected0 of 29Within
Mammoth Mountain Ski Area - Outpost 14none detectednone detected0 of 29Within
Manhattan Beach-city, Water Dept.none detectednone detected0 of 29Within
Marin Municipal Water Districtnone detectednone detected0 of 29Within
Marina Coast Water Districtnone detectednone detected0 of 29Within
Mcfarland, City ofnone detectednone detected0 of 29Within
Mckinleyville C.s.d.none detectednone detected0 of 29Within
Meadow Vista Cwdnone detectednone detected0 of 29Within
Meadows Union Elementary Schoolnone detectednone detected0 of 29Within
Meiners Oaks Cwdnone detectednone detected0 of 29Within
Mendota, City ofnone detectednone detected0 of 29Within
Menlo Park Municipal Waternone detectednone detected0 of 29Within
Mesa Water Districtnone detectednone detected0 of 29Within
Mid Valley Agnone detectednone detected0 of 29Within
Mid-peninsula Water Districtnone detectednone detected0 of 29Within
Millview County Water Districtnone detectednone detected0 of 29Within
Mission Hills Csdnone detectednone detected0 of 29Within
Mission Springs Wdnone detectednone detected0 of 29Within
Mojave Pudnone detectednone detected0 of 29Within
Montara Water and Sanitary Districtnone detectednone detected0 of 29Within
Montebello-city, Water Dept.none detectednone detected0 of 29Within
Montecito Water Distnone detectednone detected0 of 29Within
Monterey Park-city, Water Dept.none detectednone detected2 of 29Within
Morro Bay Pw Dept - Water Divisionnone detectednone detected0 of 29Within
Moulton Niguel Water Districtnone detectednone detected0 of 29Within
Mountain House Community Services Dist.none detectednone detected0 of 29Within
Mt. Konocti Mutual Water Companynone detectednone detected0 of 29Within
Mt. Shasta, City ofnone detectednone detected0 of 29Within
Muscoy Mwc No. 1none detectednone detected0 of 29Within
Myoma Dunes Mutual Water Companynone detectednone detected0 of 29Within
Napa, City ofnone detectednone detected0 of 29Within
Nas North Island & Nab Coronadonone detectednone detected0 of 29Within
Nasa Ames Research Centernone detectednone detected0 of 29Within
Needles, City ofnone detectednone detected0 of 29Within
Nevada Id - E. George, Banner Mountainnone detectednone detected0 of 29Within
Nevada Id - Lake of Pinesnone detectednone detected0 of 29Within
Nevada Id - Lake Wildwoodnone detectednone detected0 of 29Within
Nevada Id - Loma Ricanone detectednone detected0 of 29Within
Nevada Id - North Auburnnone detectednone detected0 of 29Within
Nipomo Comm Services Distnone detectednone detected0 of 29Within
North Coast County Water Distnone detectednone detected0 of 29Within
North Marin Water Districtnone detectednone detected0 of 29Within
North Perris Water Systemnone detectednone detected0 of 29Within
North Tahoe Pud - Mainnone detectednone detected0 of 29Within
Northstar C.s.d.none detectednone detected0 of 29Within
Nps Ggnranone detectednone detected0 of 29Within
Oak Park Water Servicenone detectednone detected0 of 29Within
Oakdale, City ofnone detectednone detected0 of 29Within
Oceano Comm Services Dist.none detectednone detected0 of 29Within
Oceanside, City ofnone detectednone detected0 of 29Within
Oildale Mwcnone detectednone detected0 of 29Within
Ojai Water Systemnone detectednone detected0 of 29Within
Olivehurst Public U.d.none detectednone detected0 of 29Within
Olivenhain Mwdnone detectednone detected0 of 29Within
Orange Vale Water Companynone detectednone detected0 of 29Within
Orosi Public Utility Districtnone detectednone detected0 of 29Within
Otay Water Districtnone detectednone detected0 of 29Within
Oxnard Water Deptnone detectednone detected0 of 29Within
Padre Dam Mwdnone detectednone detected1 of 29Within
Pajaro Community Services Districtnone detectednone detected0 of 29Within
Palm Ranch Irrigation Dist.none detectednone detected0 of 29Within
Palmdale Water Dist.none detectednone detected3 of 29Within
Paradise Irrigation Districtnone detectednone detected0 of 29Within
Paramount - City, Water Dept.none detectednone detected0 of 29Within
Pasadena-city, Water Dept.none detectednone detected0 of 29Within
Patterson Tract Csdnone detectednone detected0 of 29Within
Patterson, City ofnone detectednone detected0 of 29Within
Perris, City ofnone detectednone detected3 of 29Within
Petaluma, City ofnone detectednone detected0 of 29Within
Phelan Pinon Hills Csdnone detectednone detected0 of 29Within
Pismo Beach Water Departmentnone detectednone detected0 of 29Within
Placer Cwa - Auburn/bowmannone detectednone detected0 of 29Within
Placer Cwa - Foothillnone detectednone detected0 of 29Within
Placerville, City of - Mainnone detectednone detected0 of 29Within
Plumas Lakenone detectednone detected0 of 29Within
Ponderosa Basin Mutual Wtr Conone detectednone detected0 of 29Within
Port Hueneme Water Deptnone detectednone detected0 of 29Within
Porterville-jones Cornernone detectednone detected0 of 29Within
Poway, City ofnone detectednone detected0 of 29Within
Purissima Hills Water Districtnone detectednone detected0 of 29Within
Quartz Hill Water Dist.none detectednone detected0 of 29Within
Rainbow Municipal Wdnone detectednone detected0 of 29Within
Ramona Municipal Wdnone detectednone detected0 of 29Within
Rancheritos Mwcnone detectednone detected0 of 29Within
Rancho Murieta Community Servinone detectednone detected0 of 29Within
Redwood Valley County Water Districtnone detectednone detected0 of 29Within
Reedley, City ofnone detectednone detected0 of 29Within
Rincon Del Diablo Mwd (id-1)none detectednone detected1 of 29Within
Rio Dell, City ofnone detectednone detected0 of 29Within
Rio Linda/elverta Community Water Distnone detectednone detected2 of 29Within
Riverbank, City ofnone detectednone detected0 of 29Within
Riverside Csa #122-mesa Verdenone detectednone detected0 of 29Within
Rodney Strong Vineyardsnone detectednone detected0 of 29Within
Rosamond Csdnone detectednone detected0 of 29Within
Rowland Water Districtnone detectednone detected1 of 29Within
Rubidoux Community Sdnone detectednone detected3 of 29Within
Russian River County Water Districtnone detectednone detected0 of 29Within
Sacramento International Airport [sws]none detectednone detected0 of 29Within
Sacramento Suburban Water Districtnone detectednone detected4 of 29Within
Salinas Valley State Prisonnone detectednone detected0 of 29Within
San Antonio Water Companynone detectednone detected0 of 29Within
San Benito High Schoolnone detectednone detected0 of 29Within
San Bernardino Citynone detectednone detected4 of 29Within
San Diego, City ofnone detectednone detected0 of 29Within
San Fernando-city, Water Dept.none detectednone detected0 of 29Within
San Francisco International Airportnone detectednone detected0 of 29Within
San Francisco Regional Water Systemnone detectednone detected0 of 29Within
San Gabriel County Wdnone detectednone detected0 of 29Within
San Gabriel Valley Water Co.-el Montenone detectednone detected2 of 29Within
San Gabriel Valley Water Co.-montebellonone detectednone detected0 of 29Within
San Gabriel Valley Wc - Fontananone detectednone detected0 of 29Within
San Jacinto, City ofnone detectednone detected0 of 29Within
San Joaquin County - Lincoln Villagenone detectednone detected0 of 29Within
San Joaquin River Club Incnone detectednone detected0 of 29Within
San Joaquin, City ofnone detectednone detected0 of 29Within
San Juan Water Districtnone detectednone detected0 of 29Within
San Lorenzo Valley Water Distnone detectednone detected1 of 29Within
San Luis Obispo Water Departmentnone detectednone detected0 of 29Within
Santa Ana River Water Companynone detectednone detected0 of 29Within
Santa Clarita Valley W.a.-castaic Div.none detectednone detected0 of 29Within
Santa Clarita Valley W.a.-newhall Div.none detectednone detected1 of 29Within
Santa Clarita Valley W.a.-pinetree Div.none detectednone detected0 of 29Within
Santa Clarita Valley W.a.-tesoro Div.none detectednone detected0 of 29Within
Santa Cruz Water Departmentnone detectednone detected0 of 29Within
Santa Fe I.d.none detectednone detected2 of 29Within
Santa Margarita Water Districtnone detectednone detected0 of 29Within
Santa Maria Water Departmentnone detectednone detected0 of 29Within
Santa Paula Water Systemnone detectednone detected0 of 29Within
Santa Rosa, City ofnone detectednone detected0 of 29Within
Santa Ynez River Water Cons. Dist. Id#1none detectednone detected0 of 29Within
Sbdno County Service Area 64none detectednone detected0 of 29Within
Sbndo County Service Area 70Jnone detectednone detected0 of 29Within
Scotts Valley Water Districtnone detectednone detected2 of 29Within
Scwa Mather-sunrisenone detectednone detected0 of 29Within
Sea Ranch Water Company,the (puc)none detectednone detected1 of 29Within
Sebastopol, City ofnone detectednone detected0 of 29Within
Serrano Water Districtnone detectednone detected2 of 29Within
Sfpuc City Distribution Divisionnone detectednone detected0 of 29Within
Sfwp-miners Ranchnone detectednone detected0 of 29Within
Shafter, City ofnone detectednone detected0 of 29Within
Sheep Creek Water Companynone detectednone detected4 of 29Within
Sierra Madre-city, Water Dept.none detectednone detected0 of 29Within
Signal Hill - City, Water Dept.none detectednone detected0 of 29Within
Slvwd - Felton Water Systemnone detectednone detected0 of 29Within
So. Cal. Edison Co.-santa Catalinanone detectednone detected1 of 29Within
Soledad, City ofnone detectednone detected0 of 29Within
Solvang Water Divisionnone detectednone detected1 of 29Within
Sonoma State Universitynone detectednone detected0 of 29Within
Soquel Creek Water Districtnone detectednone detected0 of 29Within
South Coast Water Districtnone detectednone detected1 of 29Within
South Mesa Wcnone detectednone detected4 of 29Within
South Shore Recreation Areanone detectednone detected0 of 29Within
Squaw Valley 8200 Water Systemnone detectednone detected0 of 29Within
St. Helena, City ofnone detectednone detected0 of 29Within
Stallion Springs Csdnone detectednone detected0 of 29Within
Stanford Universitynone detectednone detected0 of 29Within
Storer Transportationnone detectednone detected0 of 29Within
Suburban Water Systems-glendoranone detectednone detected0 of 29Within
Suburban Water Systems-san Josenone detectednone detected4 of 29Within
Suisun-solano Water Authoritynone detectednone detected0 of 29Within
Sunny Slope Water Co.none detectednone detected0 of 29Within
Sweetwater Springs Cwd - Guernevillenone detectednone detected0 of 29Within
Tahoe City Pud - Mainnone detectednone detected0 of 29Within
Tehachapi, City ofnone detectednone detected0 of 29Within
Tejon Castac Wd - I5 & Laval Rdnone detectednone detected0 of 29Within
Temescal Valley Water Districtnone detectednone detected0 of 29Within
Templeton Csdnone detectednone detected2 of 29Within
Terra Bella Irrigation District - Tbtnone detectednone detected0 of 29Within
Thousand Oaks Water Deptnone detectednone detected0 of 29Within
Thousand Trails San Benito Preservenone detectednone detected0 of 29Within
Tipton Community Services Distnone detectednone detected0 of 29Within
Torrance-city, Water Dept.none detectednone detected0 of 29Within
Town of Discovery Baynone detectednone detected0 of 29Within
Town of Hillsboroughnone detectednone detected0 of 29Within
Town of Yountvillenone detectednone detected0 of 29Within
Trabuco Canyon Water Districtnone detectednone detected0 of 29Within
Tracy, City ofnone detectednone detected0 of 29Within
Trout Gulch Mutual Water Companynone detectednone detected0 of 29Within
Tud - Columbia Water Systemnone detectednone detected0 of 29Within
Tud - Sonora/jamestown Water Systemnone detectednone detected0 of 29Within
Tud - Upper Basin Water Systemnone detectednone detected0 of 29Within
Tud-wards Ferry Ranchesnone detectednone detected3 of 29Within
Tulare, City ofnone detectednone detected0 of 29Within
Turlock, City ofnone detectednone detected0 of 29Within
Twentynine Palms Water Districtnone detectednone detected0 of 29Within
UC Davisnone detectednone detected0 of 29Within
Union Public Utility Districtnone detectednone detected0 of 29Within
Upland, City ofnone detectednone detected3 of 29Within
US Army Fort Irwinnone detectednone detected0 of 29Within
Usmc - 29 Palmsnone detectednone detected0 of 29Within
Vallecitos Wdnone detectednone detected0 of 29Within
Valley Center Mwdnone detectednone detected0 of 29Within
Valley County Water Dist.none detectednone detected0 of 29Within
Valley View Mutual Water Co.none detectednone detected0 of 29Within
Valley Water Co.none detectednone detected0 of 29Within
Vandenberg Village Comm. Serv. Dist.none detectednone detected0 of 29Within
Vaughn Wc Incnone detectednone detected2 of 29Within
Ventura Cwwd No. 1 - Moorparknone detectednone detected0 of 29Within
Ventura River Water Districtnone detectednone detected0 of 29Within
Ventura Water Departmentnone detectednone detected2 of 29Within
Ventura Wwd No. 8 - Simi Valleynone detectednone detected0 of 29Within
Vernon-city, Water Dept.none detectednone detected0 of 29Within
Victorville Water Districtnone detectednone detected0 of 29Within
Vista Irrigation Districtnone detectednone detected0 of 29Within
Walnut Park Mutual Water Co.none detectednone detected0 of 29Within
Walnut Valley Water Districtnone detectednone detected0 of 29Within
Wasco St. Prison Reception Ctrnone detectednone detected0 of 29Within
Wasco, City ofnone detectednone detected0 of 29Within
West Kern Water Districtnone detectednone detected0 of 29Within
West Valley Water Districtnone detectednone detected0 of 29Within
Westborough County Water Distnone detectednone detected0 of 29Within
Western Heights Water Companynone detectednone detected0 of 29Within
Western Mwdnone detectednone detected3 of 29Within
Whale Gulch Elementary Schoolnone detectednone detected0 of 29Within
Willits, City ofnone detectednone detected0 of 29Within
Willow County Water Districtnone detectednone detected0 of 29Within
Windsor, Town ofnone detectednone detected0 of 29Within
Wine Country Apartmentsnone detectednone detected0 of 29Within
Winton Water & Sanitary Distnone detectednone detected0 of 29Within
Woodlake, City ofnone detectednone detected0 of 29Within
Yorba Linda Water Districtnone detectednone detected2 of 29Within
Yreka, City ofnone detectednone detected0 of 29Within

All 707 systems the EPA tested in California, every one of them with its own page. Each was tested for 29 PFAS compounds.

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Source, the EPA’s fifth Unregulated Contaminant Monitoring Rule, final dataset published 2026-10-15. Original data →