States / CA

California

116

Superfund NPL sites

239

water systems with PFAS detections

166

systems above a final limit

36.0M lb

reported 2024 releases

Superfund NPL sites, by county

none
1 to 3
4 to 8
9 to 13
14 or more

Counties

County	NPL	Cleanup sites	PFAS systems	TRI facilities	Open tank releases
Los Angeles County	19	194	68	307	522
San Diego County	1	35	9	68	101
Orange County	4	32	18	95	201
Riverside County	3	19	14	48	79
San Bernardino County	5	51	24	101	43
Santa Clara County	23	47	5	40	67
Alameda County	4	30	3	36	268
Sacramento County	5	7	15	20	72
Contra Costa County	3	14	0	34	59
Fresno County	7	23	7	33	43
Kern County	2	23	6	35	16
Ventura County	2	9	3	21	17
San Francisco County	1	11	1	1	53
San Joaquin County	3	6	7	34	73
San Mateo County	0	9	1	6	70
Stanislaus County	3	14	2	24	12
Sonoma County	2	12	5	11	101
Tulare County	2	6	3	23	27
Solano County	2	3	2	16	20
Santa Barbara County	1	7	2	11	29
Monterey County	3	12	1	6	32
Placer County	0	1	1	8	11
Merced County	1	2	5	14	35
San Luis Obispo County	1	3	8	12	3
Santa Cruz County	1	5	3	1	15
Marin County	0	6	0	0	16
Yolo County	1	5	1	5	14
Butte County	3	8	4	0	7
El Dorado County	0	7	3	0	12
Shasta County	2	5	1	8	14
Imperial County	1	8	0	5	25
Madera County	0	1	3	11	8
Kings County	0	0	0	10	9
Humboldt County	2	4	0	2	31
Napa County	0	2	1	3	12
Nevada County	1	5	1	0	7
Sutter County	0	3	1	0	4
Mendocino County	1	5	1	1	44
Yuba County	0	1	1	3	11
San Benito County	1	1	1	5	0
Lake County	1	3	1	1	4
Tehama County	0	0	1	1	2
Tuolumne County	0	3	2	1	13
Calaveras County	0	1	0	0	4
Siskiyou County	2	6	0	3	7
Amador County	1	2	0	1	3
Lassen County	0	3	0	2	8
Glenn County	0	2	0	1	3
Del Norte County	1	4	0	1	5
Colusa County	0	1	0	2	2
Plumas County	0	4	1	2	5
Inyo County	0	3	0	1	6
Mariposa County	0	5	0	0	6
Trinity County	0	3	1	0	4
Mono County	0	1	0	1	0
Modoc County	0	1	1	0	3
Sierra County	0	0	0	0	2
Alpine County	1	1	1	0	0

Superfund sites in California

Advanced Micro Devices, Inc.Sunnyvale
Advanced Micro Devices, Inc. (Building 915)Sunnyvale
Aerojet General Corp.Rancho Cordova
Afterthought MineBella Vista
Alameda Naval Air StationAlameda
Alark Hard ChromeRiverside
AMCO ChemicalOakland
Applied MaterialsSanta Clara
Argonaut MineJackson
Atlas Asbestos MineFresno County
Barstow Marine Corps Logistics BaseBarstow
Beckman Instruments (Porterville Plant)Porterville
Blue Ledge MineRogue River - Siskiyou National Forest
Brown & Bryant, Inc. (Arvin Plant)Arvin
Camp Pendleton Marine Corps BaseSan Diego County
Casmalia ResourcesCasmalia
Castle Air Force Base (6 Areas)Merced
Celtor Chemical WorksHoopa
Coalinga Asbestos MineCoalinga
Coast Wood PreservingUkiah
Concord Naval Weapons StationConcord
Cooper Drum CompanySouth Gate
Copper Bluff MineHoopa
Crazy Horse Sanitary LandfillSalinas
CTS Printex, Inc.Mountain View
Del AmoLos Angeles
Del Norte Pesticide StorageCrescent City
Edwards Air Force BaseKern County
El Toro Marine Corps Air StationEl Toro
Exide Technologies - VernonVernon
Fairchild Semiconductor Corp. (Mountain View Plant)Mountain View
Fairchild Semiconductor Corp. (South San Jose Plant)South San Jose
Firestone Tire & Rubber Co. (Salinas Plant)Salinas
Fort OrdMarina
Fresno Municipal Sanitary LandfillFresno
Frontier FertilizerDavis
George Air Force BaseVictorville
Halaco Engineering CompanyOxnard
Hewlett-Packard (620-640 Page Mill Road)Palo Alto
Hunters Point Naval ShipyardSan Francisco
Industrial Waste ProcessingFresno
Intel Corp. (Mountain View Plant)Mountain View
Intel Corp. (Santa Clara III)Santa Clara
Intel MagneticsSanta Clara
Intersil Inc./Siemens ComponentsCupertino
Iron Mountain MineRedding
J.H. Baxter & Co.Weed
JASCO Chemical Corp.Mountain View
Jervis B. Webb Co.South Gate
Jet Propulsion Laboratory (NASA)Pasadena
Jibboom JunkyardSacramento
Klau/Buena Vista MinePaso Robles
Koppers Co., Inc. (Oroville Plant)Oroville
Laboratory for Energy-Related Health Research/Old Campus Landfill (USDOE)Davis
Lava Cap MineNevada City
Lawrence Livermore Laboratory (USDOE)Livermore
Lawrence Livermore National Laboratory (Site 300) (USDOE)Livermore
Leviathan MineMarkleeville
Liquid Gold Oil Corp.Richmond
Lorentz Barrel & Drum Co.San Jose
Louisiana-Pacific Corp.Oroville
March Air Force BaseRiverside
Mather Air Force BaseSacramento
McClellan Air Force Base (Ground Water Contamination)Sacramento
McCollFullerton
McCormick & Baxter Creosoting Co.Stockton
MGM BrakesCloverdale
Modesto Ground Water ContaminationModesto
Moffett Naval Air StationSunnyvale
Monolithic MemoriesSunnyvale
Montrose Chemical Corp.Torrance
National Semiconductor Corp.Santa Clara
New Idria Mercury MineIdria
Newmark Ground Water ContaminationSan Bernardino
Norton Air Force BaseSan Bernardino
Omega Chemical CorporationWhittier
Operating Industries, Inc., LandfillMonterey Park
Orange County North BasinOrange County
Pacific Coast Pipe LinesFillmore
Pemaco MaywoodMaywood
Purity Oil Sales, Inc.Malaga
Ralph Gray Trucking Co.Westminster
Raytheon Corp.Mountain View
Riverbank Army Ammunition PlantRiverbank
Rockets, Fireworks, and Flares (RFF)Rialto
Sacramento Army DepotSacramento
San Fernando Valley (Area 1)Los Angeles
San Fernando Valley (Area 2)Glendale, Los Angeles
San Fernando Valley (Area 3)Glendale
San Fernando Valley (Area 4)Los Angeles
San Gabriel Valley (Area 1)El Monte
San Gabriel Valley (Area 2)Baldwin Park Area
San Gabriel Valley (Area 3)Alhambra
San Gabriel Valley (Area 4)La Puente
Selma Treating Co.Selma
Sharpe Army DepotLathrop
Sola Optical USA, Inc.Petaluma
South Bay Asbestos AreaAlviso
Southern Avenue Industrial AreaSouth Gate
Southern California Edison Co. (Visalia Poleyard)Visalia
Spectra-Physics, Inc.Mountain View
Stoker CompanyImperial
StringfellowGlen Avon Heights
Sulphur Bank Mercury MineClear Lake
Synertek, Inc. (Building 1)Santa Clara
T.H. Agriculture & Nutrition Co.Fresno
Teledyne SemiconductorMountain View
Tracy Defense Depot (USARMY)Tracy
Travis Air Force BaseSolano County
TRW Microwave, Inc. (Building 825)Sunnyvale
United Heckathorn Co.Richmond
Valley Wood Preserving, Inc.Turlock
Waste Disposal, Inc.Santa Fe Springs
Watkins-Johnson Co. (Stewart Division Plant)Scotts Valley
Western Pacific Railroad Co.Oroville
Westinghouse Electric Corp. (Sunnyvale Plant)Sunnyvale