PFAS Contamination in California
468 contamination sites tracked
California leads the nation in PFAS regulation, with 468 identified contamination sites. Major hotspots include military bases, airports, and industrial facilities throughout the Central Valley and coastal regions. The state has set some of the strictest PFAS notification levels in the country.
California PFAS contamination exceeding state MCLs? Connect with certified professionals familiar with stringent state requirements.
Get a Free Assessment →California faces the nation's most extensive PFAS contamination challenges, with over 1,000 known contamination sites spanning military installations, airports, and industrial facilities. The state has taken the most aggressive regulatory approach, establishing the nation's first PFAS drinking water standards and requiring comprehensive monitoring. Major contamination sources include Naval Air Station North Island, Travis Air Force Base, and Edwards Air Force Base, each creating multi-mile contamination plumes.
The San Francisco Bay Area has numerous industrial PFAS sources, including semiconductor manufacturers in Silicon Valley and oil refineries in Richmond. Los Angeles County faces contamination from aerospace facilities, airports, and wastewater treatment plants. Orange County has implemented advanced treatment technologies to address contamination from John Wayne Airport and industrial sources.
Key Facts
- Over 1,000 known PFAS contamination sites statewide
- First state to establish enforceable PFAS drinking water standards
- Major military bases create multi-mile contamination plumes
State Regulations
California has established Maximum Contaminant Levels (MCLs) for PFOA and PFOS at 10 and 40 ppt respectively, with notification levels at 5.1 and 6.5 ppt. The state requires quarterly monitoring for all public water systems and mandates treatment when MCLs are exceeded.
Cities (321)
Sites (468)
Rolling Hills Casino
Corning, CA · Public Water System · 1 contaminants
Barona
Lakeside, CA · Public Water System · 2 contaminants
Dry Creek Rancheria
Geyserville, CA · Public Water System · 1 contaminants
Rincon Northern
Valley Center, CA · Public Water System · 5 contaminants
Viejas Community System
Alpine, CA · Public Water System · 2 contaminants
California Village
Needles, CA · Public Water System · 1 contaminants
Pechanga
Temecula, CA · Public Water System · 4 contaminants
Sycuan
El Cajon, CA · Public Water System · 1 contaminants
Pala North
Pala, CA · Public Water System · 5 contaminants
Chukchansi Gold Resort
Coarsegold, CA · Public Water System · 5 contaminants
Graton Resort and Casino
Rohnert Park, CA · Public Water System · 1 contaminants
KATHERINE RESORTS WATER COMPANY
LA JOLLA, CA · Public Water System · 1 contaminants
CALIFORNIA WATER SERVICE - LIVERMORE
SAN JOSE, CA · Public Water System · 7 contaminants
EAST BAY MUD
OAKLAND, CA · Public Water System · 1 contaminants
CITY OF PLEASANTON
PLEASANTON, CA · Public Water System · 9 contaminants
KIRKWOOD MEADOWS PUBLIC UTILITY DISTRICT
KIRKWOOD, CA · Public Water System · 1 contaminants
CAL-WATER SERVICE CO.-CHICO
SAN JOSE, CA · Public Water System · 7 contaminants
CITY OF GRIDLEY
GRIDLEY, CA · Public Water System · 6 contaminants
CAL-WATER SERVICE CO.-OROVILLE
SAN JOSE, CA · Public Water System · 2 contaminants
THERMALITO WATER & SEWER DIST
OROVILLE, CA · Public Water System · 2 contaminants
UNION PUBLIC UTILITY DISTRICT
MURPHYS, CA · Public Water System · 1 contaminants
BLUE LAKE SPRINGS MUT WTR
ARNOLD, CA · Public Water System · 1 contaminants
CITY OF COLUSA
COLUSA, CA · Public Water System · 1 contaminants
CITY OF WILLIAMS
WILLIAMS, CA · Public Water System · 1 contaminants
BRENTWOOD
BRENTWOOD, CA · Public Water System · 1 contaminants
DIABLO WATER DISTRICT
OAKLEY, CA · Public Water System · 1 contaminants
CITY OF PITTSBURG
PITTSBURG, CA · Public Water System · 1 contaminants
TOWN OF DISCOVERY BAY
DISCOVERY BAY, CA · Public Water System · 1 contaminants
SIERRA TAHOE MAIN LODGE
TWIN BRIDGES, CA · Public Water System · 2 contaminants
EL DORADO ID - MAIN
PLACERVILLE, CA · Public Water System · 1 contaminants
SOUTH TAHOE PUD - MAIN
SOUTH LAKE TAHOE, CA · Public Water System · 9 contaminants
CITY OF CLOVIS
CLOVIS, CA · Public Water System · 10 contaminants
FIREBAUGH CITY
FIREBAUGH, CA · Public Water System · 1 contaminants
CITY OF FOWLER
FOWLER, CA · Public Water System · 1 contaminants
CITY OF FRESNO
FRESNO, CA · Public Water System · 10 contaminants
LATON COMMUNITY SERVICES DISTRICT
LATON, CA · Public Water System · 3 contaminants
PINEDALE COUNTY WATER DISTRICT
PINEDALE, CA · Public Water System · 8 contaminants
CITY OF SANGER
SANGER, CA · Public Water System · 4 contaminants
SAN JOAQUIN, CITY OF
SAN JOAQUIN, CA · Public Water System · 1 contaminants
CALIFORNIA STATE UNIVERSITY FRESNO
FRESNO, CA · Public Water System · 6 contaminants
CITY OF ORLAND
ORLAND, CA · Public Water System · 1 contaminants
CAL-WATER SERVICE CO.-WILLOWS
SAN JOSE, CA · Public Water System · 1 contaminants
HUMBOLDT C.S.D.
CUTTEN, CA · Public Water System · 1 contaminants
IMPERIAL VALLEY COLLEGE
IMPERIAL, CA · Public Water System · 1 contaminants
BRAWLEY, CITY OF
BRAWLEY, CA · Public Water System · 1 contaminants
CALEXICO, CITY OF
CALEXICO, CA · Public Water System · 1 contaminants
GSWC - CALIPATRIA
SAN DIMAS, CA · Public Water System · 1 contaminants
EL CENTRO, CITY OF
EL CENTRO, CA · Public Water System · 1 contaminants
HOLTVILLE, CITY OF
HOLTVILLE, CA · Public Water System · 1 contaminants
IMPERIAL, CITY OF
IMPERIAL, CA · Public Water System · 1 contaminants
HEBER PUBLIC UTILITY DISTRICT
HEBER, CA · Public Water System · 1 contaminants
CALIPATRIA STATE PRISON
IMPERIAL, CA · Public Water System · 1 contaminants
CENTINELA STATE PRISON
IMPERIAL, CA · Public Water System · 1 contaminants
CWS - BAKERSFIELD
SAN JOSE, CA · Public Water System · 8 contaminants
DELANO, CITY OF
DELANO, CA · Public Water System · 1 contaminants
EAST NILES CSD
BAKERSFIELD, CA · Public Water System · 1 contaminants
LAMONT PUBLIC UTILITY DIST
LAMONT, CA · Public Water System · 1 contaminants
MOJAVE PUD
MOJAVE, CA · Public Water System · 1 contaminants
OILDALE MWC
BAKERSFIELD, CA · Public Water System · 1 contaminants
INDIAN WELLS VALLEY W.D.
RIDGECREST, CA · Public Water System · 1 contaminants
ROSAMOND CSD
ROSAMOND, CA · Public Water System · 1 contaminants
GREENFIELD COUNTY WD
BAKERSFIELD, CA · Public Water System · 1 contaminants
STALLION SPRINGS CSD
TEHACHAPI, CA · Public Water System · 1 contaminants
VAUGHN WC INC
BAKERSFIELD, CA · Public Water System · 2 contaminants
BAKERSFIELD, CITY OF
SAN JOSE, CA · Public Water System · 4 contaminants
CALIFORNIA CITY, CITY OF
CALIFORNIA CITY, CA · Public Water System · 1 contaminants
BEAR VALLEY CSD
TEHACHAPI, CA · Public Water System · 2 contaminants
GOLDEN HILLS CSD
TEHACHAPI, CA · Public Water System · 7 contaminants
CWS - NORTH GARDEN
SAN JOSE, CA · Public Water System · 2 contaminants
EDWARDS AFB - MAIN BASE
EDWARDS AFB, CA · Public Water System · 1 contaminants
CHINA LAKE NAVAL AIR WEAPONS STATION
CHINA LAKE, CA · Public Water System · 1 contaminants
CCI - TEHACHAPI
TEHACHAPI, CA · Public Water System · 1 contaminants
WASCO ST. PRISON RECEPTION CTR
WASCO, CA · Public Water System · 1 contaminants
LA CANADA IRRIGATION DIST.
LA CANADA, CA · Public Water System · 1 contaminants
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM
RANCHO CORDOVA, CA · Public Water System · 1 contaminants
HIGHLANDS MUTUAL WATER COMPANY
CLEARLAKE, CA · Public Water System · 1 contaminants
LAKEPORT, CITY OF
LAKEPORT, CA · Public Water System · 1 contaminants
LUCERNE WATER CO. - CAL WATER SERVICE
SAN JOSE, CA · Public Water System · 1 contaminants
KONOCTI COUNTY WATER DISTRICT
CLEARLAKE, CA · Public Water System · 3 contaminants
MT. KONOCTI MUTUAL WATER COMPANY
KELSEYVILLE, CA · Public Water System · 1 contaminants
HIDDEN VALLEY LAKE CSD
HIDDEN VALLEY LAKE, CA · Public Water System · 1 contaminants
CITY OF SUSANVILLE
SUSANVILLE, CA · Public Water System · 1 contaminants
PETER PITCHESS HONOR RANCHO DETN. CTR
CASTAIC, CA · Public Water System · 4 contaminants
RANCHO LOS AMIGOS HOSPITAL
ALHAMBRA, CA · Public Water System · 3 contaminants
CITY OF ALHAMBRA
ALHAMBRA, CA · Public Water System · 1 contaminants
CITY OF ARCADIA
ARCADIA, CA · Public Water System · 2 contaminants
GSWC - ARTESIA
ANAHEIM, CA · Public Water System · 2 contaminants
SO. CAL. EDISON CO.-SANTA CATALINA
AVALON, CA · Public Water System · 2 contaminants
AZUSA LIGHT AND WATER
AZUSA, CA · Public Water System · 3 contaminants
CALIFORNIA WATER SERVICE CO.-LANCASTER
SAN JOSE, CA · Public Water System · 1 contaminants
GSWC - BELL, BELL GARDENS
ANAHEIM, CA · Public Water System · 7 contaminants
BELLFLOWER - SOMERSET MWC
BELLFLOWER, CA · Public Water System · 2 contaminants
SANTA CLARITA VALLEY W.A.-SANTA CLARITA
NEWHALL, CA · Public Water System · 9 contaminants
BELLFLOWER MUNICIPAL WATER SYSTEM
ROSEMEAD, CA · Public Water System · 4 contaminants
CERRITOS - CITY, WATER DEPT.
CERRITOS, CA · Public Water System · 2 contaminants
LIBERTY UTILITIES - COMPTON
DOWNEY, CA · Public Water System · 1 contaminants
GSWC - CLAREMONT
SAN DIMAS, CA · Public Water System · 7 contaminants
COMPTON-CITY, WATER DEPT.
COMPTON, CA · Public Water System · 4 contaminants
CRESCENTA VALLEY CWD
LA CRESCENTA, CA · Public Water System · 7 contaminants
GSWC - CULVER CITY
ANAHEIM, CA · Public Water System · 1 contaminants
Showing 100 of 468 sites. Use the map for complete coverage.
Nearby States
Frequently Asked Questions
How many PFAS contamination sites are in California?
California has 468 PFAS contamination sites tracked in our database, sourced from EPA data.
How do I find PFAS sites near me in California?
Use our interactive map to search for PFAS contamination sites near any address in California. You can also browse by city below.
How can I get help with PFAS contamination in California?
Click "Get Help" to connect with certified PFAS remediation contractors in California. We offer free assessments.