PFAS in California water

The EPA tested public water systems across California for 29 PFAS. In 164 of them, at least one came back above a federal limit. Find your system below — you'll get the actual levels, our plain verdict on each compound, and the filter that genuinely removes it. We sell nothing.

Not listed? Your system may not have been sampled, or nothing exceeded a limit — see the national picture.

• Adelanto, City Of 1 over the limit
• Arroyo Grande, Water Department 2 over the limit
• Atascadero Mutual Water Co 2 over the limit
• Atascadero State Hospital 2 over the limit
• Azusa Light And Water 2 over the limit
• Bakersfield, City Of 1 over the limit
• Bear Valley Csd 1 over the limit
• Bellflower - Somerset Mwc 1 over the limit
• Bellflower Municipal Water System 2 over the limit
• Big Bear City Csd 3 over the limit
• Big Bear Lake Dwp - Big Bear System 2 over the limit
• Cal Am - Meadowbrook 1 over the limit
• Cal Am - Suburban Rosemont 3 over the limit
• Cal Am Water Company - Monterey 2 over the limit
• Cal-Am Water Company - Duarte 1 over the limit
• Cal-Water Service Co.-Chico 3 over the limit
• Calam - Arden 2 over the limit
• Calam - Parkway 2 over the limit
• California State Fair 1 over the limit
• California State University Fresno 1 over the limit
• California Water Service - Livermore 2 over the limit
• California Water Service - Stockton 1 over the limit
• California Water Service Co. - Ela 1 over the limit
• Calistoga, City Of 2 over the limit
• Camrosa Water District 1 over the limit
• Ceres, City Of 2 over the limit
• Cerritos - City, Water Dept. 1 over the limit
• Chowchilla City Water Dept 1 over the limit
• City Of Anaheim 3 over the limit
• City Of Arcadia 1 over the limit
• City Of Atwater 3 over the limit
• City Of Bell Gardens 2 over the limit
• City Of Buena Park 1 over the limit
• City Of Clovis 2 over the limit
• City Of Fresno 3 over the limit
• City Of Fullerton 2 over the limit
• City Of Garden Grove 2 over the limit
• City Of Gilroy 2 over the limit
• City Of Gridley 2 over the limit
• City Of Huntington Beach 1 over the limit
• City Of Lathrop 1 over the limit
• City Of Lincoln 1 over the limit
• City Of Merced 3 over the limit
• City Of Orange 3 over the limit
• City Of Pleasanton 3 over the limit
• City Of Red Bluff 1 over the limit
• City Of Redding 2 over the limit
• City Of Sacramento Main 3 over the limit
• City Of Sanger 2 over the limit
• City Of Santa Ana 2 over the limit
• City Of Stockton 1 over the limit
• City Of Tustin 1 over the limit
• City Of Vacaville 2 over the limit
• City Of Westminster 1 over the limit
• City Of Wheatland 1 over the limit
• Colton, City Of 2 over the limit
• Commerce-City, Water Dept. 1 over the limit
• Compton-City, Water Dept. 2 over the limit
• Crescenta Valley Cwd 1 over the limit
• Crestline Village Cwd - Division 10 3 over the limit
• Cws - Bakersfield 2 over the limit
• Cws - North Garden 1 over the limit
• Cws - Visalia 2 over the limit
• Delhi Cwd 1 over the limit
• Downey - City, Water Dept. 2 over the limit
• East Valley Water District 2 over the limit
• El Monte-City, Water Dept. 1 over the limit
• Farm Mutual W.C. (The) 2 over the limit
• Florin County Water District 2 over the limit
• Folsom State Prison 1 over the limit
• Glendale-City, Water Dept. 2 over the limit
• Golden Hills Csd 2 over the limit
• Golden State Water Co - Barstow 1 over the limit
• Golden State Wc - Placentia/Yorba Linda 2 over the limit
• Golden State Wc - West Orange County 2 over the limit
• Great Oaks Wc Inc 1 over the limit
• Groveland Community Serv Dist 1 over the limit
• Gswc - Artesia 1 over the limit
• Gswc - Bell, Bell Gardens 1 over the limit
• Gswc - Claremont 2 over the limit
• Gswc-San Dimas 1 over the limit
• Gswc-South Arcadia 2 over the limit
• Guadalupe Valley Mid 2 over the limit
• Helendale Community Service District 3 over the limit
• Hesperia Wd 3 over the limit
• Huntington Park-City, Water Dept. 2 over the limit
• Inglewood- City, Water Dept. 1 over the limit
• La Habra Heights Cwd 2 over the limit
• Lake Arrowhead Csd 2 over the limit
• Lakeside Wd 1 over the limit
• Lakewood - City, Water Dept. 1 over the limit
• Laton Community Services District 2 over the limit
• Liberty Utilities - Bellflower-Norwalk 3 over the limit
• Liberty Utilities - Lynwood 2 over the limit
• Lindsay, City Of 2 over the limit
• Lodi, City Of 2 over the limit
• Loma Linda University 1 over the limit
• Lomita-City, Water Dept. 1 over the limit
• Los Osos Community Services District 2 over the limit
• Lynwood-City, Water Dept. 2 over the limit
• Manteca, City Of 2 over the limit
• Maywood Mutual Water Co. #1 1 over the limit
• Maywood Mutual Water Co. #2 1 over the limit
• Maywood Mutual Water Co. #3 2 over the limit
• Modesto, City Of 2 over the limit
• Monrovia-City, Water Dept. 2 over the limit
• Monte Vista Cwd 1 over the limit
• Montebello Land & Water Co. 2 over the limit
• Norco, City Of 3 over the limit
• Northrop Grumman Corp. 1 over the limit
• Norwalk - City, Water Dept. 2 over the limit
• Nuevo Water Company 2 over the limit
• Olympia Mobilodge 1 over the limit
• Ontario Municipal Utilities Company 2 over the limit
• Orchard Dale Water District 2 over the limit
• Paso Robles Water Department 1 over the limit
• Peter Pitchess Honor Rancho Detn. Ctr 2 over the limit
• Pico Rivera - City, Water Dept. 2 over the limit
• Pico Wd 2 over the limit
• Pinedale County Water District 2 over the limit
• Planada Csd 1 over the limit
• Pleasant Valley Mutual Water Co 2 over the limit
• Pomona - City, Water Dept. 2 over the limit
• Porterville, City Of 2 over the limit
• Potrero Elementary School 4 over the limit
• Rancho California Water District 2 over the limit
• Rancho Los Amigos Hospital 2 over the limit
• Redlands City Mud-Water Div 2 over the limit
• Rialto, City Of 1 over the limit
• Ripon, City Of 2 over the limit
• Riverside Highland Water Company 3 over the limit
• Rohnert Park, City Of 1 over the limit
• Rubio Canon Land & Water Association 3 over the limit
• Running Springs Water District 3 over the limit
• San Dieguito Wd 1 over the limit
• San Joaquin County-Mokelumne Acres 2 over the limit
• San Jose Water 1 over the limit
• Santa Clarita Valley W.A.-Santa Clarita 2 over the limit
• Santa Clarita Valley W.A.-Valencia Divis 2 over the limit
• Santa Fe Springs - City, Water Dept. 2 over the limit
• Santa Monica-City, Water Division 1 over the limit
• Scwa - Arden Park Vista 1 over the limit
• Scwa - Laguna/Vineyard 2 over the limit
• Sierra Tahoe Main Lodge 1 over the limit
• Sonoma, City Of 1 over the limit
• South Gate-City, Water Dept. 2 over the limit
• South Montebello Irrigation Dist. 2 over the limit
• South Tahoe Pud - Main 2 over the limit
• Suburban Water Systems - Whittier 2 over the limit
• Suburban Water Systems-La Mirada 2 over the limit
• Sunnyslope County Water Dist 1 over the limit
• Sweetwater Authority 2 over the limit
• Thermalito Water & Sewer Dist 1 over the limit
• Tract 180 Mutual Water Co. 2 over the limit
• Tract 349 Mutual Water Co. 2 over the limit
• Truckee-Donner Pud, Main 1 over the limit
• Ukiah, City Of 2 over the limit
• Valencia Heights Water Co. 2 over the limit
• Valley Of The Moon Water District 2 over the limit
• Watsonville, City Of 2 over the limit
• Weaverville C.S.D. 1 over the limit
• Western Mwd - Murrieta Division 2 over the limit
• Yosemite Spring Park Util Co 3 over the limit
• Yucaipa Valley Water District 1 over the limit

Source: US EPA UCMR 5 occurrence data, 2023–2025. · All states