PFAS Hotspots · EPA UCMR5

U.S. water systems over the EPA PFAS limit

The EPA finalized the first-ever federal limits for six PFAS compounds in April 2024 — 4 ng/L for PFOA and PFOS, 10 ng/L for three others. Across the 2023–2025 UCMR5 sampling round, the systems below exceeded those limits. 176 exceedances across 81 systems.

≥ 10× the limit

≥ 5× the limit

≥ 2× the limit

106

1×–2× the limit

Method. EPA UCMR5 requires every U.S. community water system serving more than 3,300 people to sample for 29 PFAS + lithium at entry points to the distribution system, 2023–2025. We compute each system's highest detected value per analyte per year and compare against the April 2024 EPA MCL. Rows below show systems we already publish a landing page for; others are loaded but not yet listed. Full source + methodology.

System	PFAS	Measured	EPA limit	Ratio	Year
Broken Arrow Municipal Authority, OK BROKEN ARROW MUNICIPAL AUTHORITY · PWSID OK1021508	PFOS (Perfluorooctane sulfonic acid)	51.3 ng/L	4 ng/L	12.8×	2023
City of Clovis, CA CITY OF CLOVIS · PWSID CA1010003	PFOS (Perfluorooctane sulfonic acid)	41 ng/L	4 ng/L	10.3×	2023
Pembroke Pines, FL PEMBROKE PINES, CITY OF · PWSID FL4061083	PFOS (Perfluorooctane sulfonic acid)	34.7 ng/L	4 ng/L	8.7×	2023
Columbus, GA COLUMBUS · PWSID GA2150000	PFOA (Perfluorooctanoic acid)	33.9 ng/L	4 ng/L	8.5×	2024
Miami Dade 2024, FL MDWASA - MAIN SYSTEM · PWSID FL4130871	PFOS (Perfluorooctane sulfonic acid)	33 ng/L	4 ng/L	8.3×	2023
Ontario Municipal Utilities Company, CA ONTARIO MUNICIPAL UTILITIES COMPANY · PWSID CA3610034	PFOA (Perfluorooctanoic acid)	30 ng/L	4 ng/L	7.5×	2023
Miami Dade 2024, FL MDWASA - MAIN SYSTEM · PWSID FL4130871	PFOS (Perfluorooctane sulfonic acid)	29.9 ng/L	4 ng/L	7.5×	2024
Hialeah, City of, FL HIALEAH, CITY OF · PWSID FL4130604	PFOS (Perfluorooctane sulfonic acid)	27.6 ng/L	4 ng/L	6.9×	2024
Hialeah, City of, FL HIALEAH, CITY OF · PWSID FL4130604	PFOS (Perfluorooctane sulfonic acid)	23.5 ng/L	4 ng/L	5.9×	2023
Cal-water Service Co.-chico, CA CAL-WATER SERVICE CO.-CHICO · PWSID CA0410002	PFOS (Perfluorooctane sulfonic acid)	22.5 ng/L	4 ng/L	5.6×	2024
Hollywood, FL HOLLYWOOD, CITY OF · PWSID FL4060642	PFOS (Perfluorooctane sulfonic acid)	20 ng/L	4 ng/L	5.0×	2024
North Miami Beach, FL NORTH MIAMI BEACH · PWSID FL4131618	PFOS (Perfluorooctane sulfonic acid)	20 ng/L	4 ng/L	5.0×	2024
West Palm Beach, FL PALM BEACH COUNTY WATER UTILITIES · PWSID FL4504393	PFOS (Perfluorooctane sulfonic acid)	20 ng/L	4 ng/L	5.0×	2025
Pompano Beach, FL POMPANO BEACH, CITY OF · PWSID FL4061129	PFOS (Perfluorooctane sulfonic acid)	20 ng/L	4 ng/L	5.0×	2023
Vancouver, WA VANCOUVER CITY OF · PWSID WA5391200	PFOS (Perfluorooctane sulfonic acid)	18.6 ng/L	4 ng/L	4.6×	2023
City of Clovis, CA CITY OF CLOVIS · PWSID CA1010003	PFOA (Perfluorooctanoic acid)	18 ng/L	4 ng/L	4.5×	2023
West Palm Beach, FL PALM BEACH COUNTY WATER UTILITIES · PWSID FL4504393	PFOS (Perfluorooctane sulfonic acid)	18 ng/L	4 ng/L	4.5×	2024
Pomona - City, Water Dept., CA POMONA - CITY, WATER DEPT. · PWSID CA1910126	PFOS (Perfluorooctane sulfonic acid)	18 ng/L	4 ng/L	4.5×	2024
Hollywood, FL HOLLYWOOD, CITY OF · PWSID FL4060642	PFOS (Perfluorooctane sulfonic acid)	17 ng/L	4 ng/L	4.3×	2023
Coral Springs, FL CORAL SPRINGS, CITY OF · PWSID FL4060290	PFOS (Perfluorooctane sulfonic acid)	15.9 ng/L	4 ng/L	4.0×	2024
Glendale-city, Water Dept., CA GLENDALE-CITY, WATER DEPT. · PWSID CA1910043	PFOS (Perfluorooctane sulfonic acid)	15.8 ng/L	4 ng/L	4.0×	2025
Coral Springs, FL CORAL SPRINGS, CITY OF · PWSID FL4060290	PFOS (Perfluorooctane sulfonic acid)	15.4 ng/L	4 ng/L	3.9×	2025
Glendale-city, Water Dept., CA GLENDALE-CITY, WATER DEPT. · PWSID CA1910043	PFOA (Perfluorooctanoic acid)	14.8 ng/L	4 ng/L	3.7×	2025
Glendale-city, Water Dept., CA GLENDALE-CITY, WATER DEPT. · PWSID CA1910043	PFOS (Perfluorooctane sulfonic acid)	14.7 ng/L	4 ng/L	3.7×	2024
Pembroke Pines, FL PEMBROKE PINES, CITY OF · PWSID FL4061083	PFOA (Perfluorooctanoic acid)	14.4 ng/L	4 ng/L	3.6×	2023
City of Santa Ana, CA CITY OF SANTA ANA · PWSID CA3010038	PFOS (Perfluorooctane sulfonic acid)	14.2 ng/L	4 ng/L	3.6×	2025
Miami Dade 2024, FL MDWASA - MAIN SYSTEM · PWSID FL4130871	PFOA (Perfluorooctanoic acid)	14 ng/L	4 ng/L	3.5×	2023
Glendale-city, Water Dept., CA GLENDALE-CITY, WATER DEPT. · PWSID CA1910043	PFOA (Perfluorooctanoic acid)	13.6 ng/L	4 ng/L	3.4×	2024
Avondale City of, AZ City of Avondale · PWSID AZ0407088	PFOA (Perfluorooctanoic acid)	13.5 ng/L	4 ng/L	3.4×	2024
City of Fullerton, CA CITY OF FULLERTON · PWSID CA3010010	PFOS (Perfluorooctane sulfonic acid)	13.3 ng/L	4 ng/L	3.3×	2024
City of Santa Ana, CA CITY OF SANTA ANA · PWSID CA3010038	PFOS (Perfluorooctane sulfonic acid)	12.9 ng/L	4 ng/L	3.2×	2024
Fort Lauderdale, FL SUNRISE SOUTHWEST · PWSID FL4064326	PFOA (Perfluorooctanoic acid)	12.3 ng/L	4 ng/L	3.1×	2024
City of Fullerton, CA CITY OF FULLERTON · PWSID CA3010010	PFOS (Perfluorooctane sulfonic acid)	11.9 ng/L	4 ng/L	3.0×	2025
Avondale City of, AZ City of Avondale · PWSID AZ0407088	PFOS (Perfluorooctane sulfonic acid)	11.7 ng/L	4 ng/L	2.9×	2024
Vancouver, WA VANCOUVER CITY OF · PWSID WA5391200	PFOA (Perfluorooctanoic acid)	11.5 ng/L	4 ng/L	2.9×	2023
Hesperia Wd, CA HESPERIA WD · PWSID CA3610024	PFOS (Perfluorooctane sulfonic acid)	11.1 ng/L	4 ng/L	2.8×	2023
Cal-water Service Co.-chico, CA CAL-WATER SERVICE CO.-CHICO · PWSID CA0410002	PFOS (Perfluorooctane sulfonic acid)	11 ng/L	4 ng/L	2.8×	2023
High Point, City of, NC HIGH POINT, CITY OF · PWSID NC0241020	PFOS (Perfluorooctane sulfonic acid)	11 ng/L	4 ng/L	2.8×	2025
Pomona - City, Water Dept., CA POMONA - CITY, WATER DEPT. · PWSID CA1910126	PFOS (Perfluorooctane sulfonic acid)	11 ng/L	4 ng/L	2.8×	2023
Aquarion-eastern Fairfield County, CT AQUARION WATER CO OF CT-MAIN SYSTEM · PWSID CT0150011	PFOA (Perfluorooctanoic acid)	10.9 ng/L	4 ng/L	2.7×	2023
City of Fullerton, CA CITY OF FULLERTON · PWSID CA3010010	PFOA (Perfluorooctanoic acid)	10.8 ng/L	4 ng/L	2.7×	2024
Miami Dade 2024, FL MDWASA - MAIN SYSTEM · PWSID FL4130871	PFOA (Perfluorooctanoic acid)	10.7 ng/L	4 ng/L	2.7×	2024
Regional Water Authority, CT REGIONAL WATER AUTHORITY · PWSID CT0930011	PFOS (Perfluorooctane sulfonic acid)	10.7 ng/L	4 ng/L	2.7×	2024
City of Fort Worth, TX CITY OF FORT WORTH · PWSID TX2200012	PFHxS (Perfluorohexane sulfonic acid)	25.8 ng/L	10 ng/L	2.6×	2023
South Bend Water Works, IN SOUTH BEND WATER WORKS · PWSID IN5271014	PFHxS (Perfluorohexane sulfonic acid)	25.6 ng/L	10 ng/L	2.6×	2023
City of Fullerton, CA CITY OF FULLERTON · PWSID CA3010010	PFOA (Perfluorooctanoic acid)	10.2 ng/L	4 ng/L	2.6×	2025
Hesperia Wd, CA HESPERIA WD · PWSID CA3610024	PFOA (Perfluorooctanoic acid)	10.2 ng/L	4 ng/L	2.6×	2023
Hialeah, City of, FL HIALEAH, CITY OF · PWSID FL4130604	PFOA (Perfluorooctanoic acid)	10.2 ng/L	4 ng/L	2.6×	2024
City of Vacaville, CA CITY OF VACAVILLE · PWSID CA4810008	PFOS (Perfluorooctane sulfonic acid)	10 ng/L	4 ng/L	2.5×	2024
Dayton, OH DAYTON PUBLIC WATER SYSTEM · PWSID OH5703512	PFOS (Perfluorooctane sulfonic acid)	10 ng/L	4 ng/L	2.5×	2023
South Bend Water Works, IN SOUTH BEND WATER WORKS · PWSID IN5271014	PFOA (Perfluorooctanoic acid)	10 ng/L	4 ng/L	2.5×	2023
Hesperia Wd, CA HESPERIA WD · PWSID CA3610024	PFOS (Perfluorooctane sulfonic acid)	9.9 ng/L	4 ng/L	2.5×	2024
Gilbert, Town of, AZ GILBERT, TOWN OF · PWSID AZ0407092	PFOS (Perfluorooctane sulfonic acid)	9.8 ng/L	4 ng/L	2.4×	2024
Palm Bay, FL PALM BAY, CITY OF · PWSID FL3050442	PFOS (Perfluorooctane sulfonic acid)	9.5 ng/L	4 ng/L	2.4×	2024
Fort Lauderdale, FL SUNRISE SOUTHWEST · PWSID FL4064326	PFOA (Perfluorooctanoic acid)	9.3 ng/L	4 ng/L	2.3×	2023
Brownsville, TX BROWNSVILLE PUBLIC UTILITIES BOARD · PWSID TX0310001	PFOS (Perfluorooctane sulfonic acid)	9.2 ng/L	4 ng/L	2.3×	2024
Jersey City Mua, NJ JERSEY CITY MUA · PWSID NJ0906001	PFOA (Perfluorooctanoic acid)	9.2 ng/L	4 ng/L	2.3×	2024
Anchorage, AK MOA MUNICIPALITY OF ANCHORAGE · PWSID AK2210906	PFOA (Perfluorooctanoic acid)	9.1 ng/L	4 ng/L	2.3×	2023
High Point, City of, NC HIGH POINT, CITY OF · PWSID NC0241020	PFOS (Perfluorooctane sulfonic acid)	9 ng/L	4 ng/L	2.3×	2024
Huntsville, AL HUNTSVILLE UTILITIES · PWSID AL0000882	PFOS (Perfluorooctane sulfonic acid)	9 ng/L	4 ng/L	2.3×	2023
West Palm Beach, FL PALM BEACH COUNTY WATER UTILITIES · PWSID FL4504393	PFOA (Perfluorooctanoic acid)	9 ng/L	4 ng/L	2.3×	2025
City of Santa Ana, CA CITY OF SANTA ANA · PWSID CA3010038	PFOA (Perfluorooctanoic acid)	8.9 ng/L	4 ng/L	2.2×	2025
Cal-water Service Co.-chico, CA CAL-WATER SERVICE CO.-CHICO · PWSID CA0410002	PFHxS (Perfluorohexane sulfonic acid)	22.1 ng/L	10 ng/L	2.2×	2024
Columbia, SC COLUMBIA CITY OF (SC4010001) · PWSID SC4010001	PFOS (Perfluorooctane sulfonic acid)	8.6 ng/L	4 ng/L	2.1×	2025
Palm Bay, FL PALM BAY, CITY OF · PWSID FL3050442	PFOA (Perfluorooctanoic acid)	8.5 ng/L	4 ng/L	2.1×	2024
Columbus, GA COLUMBUS · PWSID GA2150000	PFOS (Perfluorooctane sulfonic acid)	8.4 ng/L	4 ng/L	2.1×	2024
City of Fort Worth, TX CITY OF FORT WORTH · PWSID TX2200012	PFOA (Perfluorooctanoic acid)	8.3 ng/L	4 ng/L	2.1×	2023
Philadelphia Water Department, PA PHILADELPHIA WATER DEPARTMENT · PWSID PA1510001	PFOA (Perfluorooctanoic acid)	8.1 ng/L	4 ng/L	2.0×	2024
Regional Water Authority, CT REGIONAL WATER AUTHORITY · PWSID CT0930011	PFOS (Perfluorooctane sulfonic acid)	8.1 ng/L	4 ng/L	2.0×	2023
Brownsville, TX BROWNSVILLE PUBLIC UTILITIES BOARD · PWSID TX0310001	PFOS (Perfluorooctane sulfonic acid)	8 ng/L	4 ng/L	2.0×	2025
Bend, OR BEND WATER DEPARTMENT · PWSID OR4100100	PFOA (Perfluorooctanoic acid)	7.9 ng/L	4 ng/L	2.0×	2023
Goodyear Water Department, AZ GOODYEAR WATER DEPARTMENT · PWSID AZ0407094	PFOS (Perfluorooctane sulfonic acid)	7.9 ng/L	4 ng/L	2.0×	2024
Tallahassee, FL TALLAHASSEE, CITY OF · PWSID FL1370655	PFOS (Perfluorooctane sulfonic acid)	7.9 ng/L	4 ng/L	2.0×	2024
Hialeah, City of, FL HIALEAH, CITY OF · PWSID FL4130604	PFOA (Perfluorooctanoic acid)	7.8 ng/L	4 ng/L	1.9×	2023
Jersey City Mua, NJ JERSEY CITY MUA · PWSID NJ0906001	PFOS (Perfluorooctane sulfonic acid)	7.7 ng/L	4 ng/L	1.9×	2024
City of Fort Worth, TX CITY OF FORT WORTH · PWSID TX2200012	PFHxS (Perfluorohexane sulfonic acid)	19.2 ng/L	10 ng/L	1.9×	2024
Bakersfield, City of, CA BAKERSFIELD, CITY OF · PWSID CA1510031	PFOS (Perfluorooctane sulfonic acid)	7.6 ng/L	4 ng/L	1.9×	2025
Jersey City Mua, NJ JERSEY CITY MUA · PWSID NJ0906001	PFOA (Perfluorooctanoic acid)	7.6 ng/L	4 ng/L	1.9×	2023
South Saint Paul, MN South Saint Paul · PWSID MN1190020	PFOA (Perfluorooctanoic acid)	7.6 ng/L	4 ng/L	1.9×	2024
City of Santa Ana, CA CITY OF SANTA ANA · PWSID CA3010038	PFOA (Perfluorooctanoic acid)	7.5 ng/L	4 ng/L	1.9×	2024
Louisville, KY LOUISVILLE WATER COMPANY · PWSID KY0560258	PFOA (Perfluorooctanoic acid)	7.5 ng/L	4 ng/L	1.9×	2023
Lakewood, NJ NJ AMERICAN WATER - COASTAL NORTH · PWSID NJ1345001	PFOA (Perfluorooctanoic acid)	7.5 ng/L	4 ng/L	1.9×	2023
Nj American Water - Raritan, NJ NJ AMERICAN WATER - RARITAN · PWSID NJ2004002	PFOA (Perfluorooctanoic acid)	7.5 ng/L	4 ng/L	1.9×	2024
Hesperia Wd, CA HESPERIA WD · PWSID CA3610024	PFOA (Perfluorooctanoic acid)	7.4 ng/L	4 ng/L	1.9×	2024
Akron City Pws, OH AKRON CITY PWS · PWSID OH7700011	PFOA (Perfluorooctanoic acid)	7.3 ng/L	4 ng/L	1.8×	2023
City of Fort Worth, TX CITY OF FORT WORTH · PWSID TX2200012	PFOS (Perfluorooctane sulfonic acid)	7.3 ng/L	4 ng/L	1.8×	2023
West Palm Beach, FL PALM BEACH COUNTY WATER UTILITIES · PWSID FL4504393	PFOA (Perfluorooctanoic acid)	7.3 ng/L	4 ng/L	1.8×	2024
Rialto, City of, CA RIALTO, CITY OF · PWSID CA3610038	PFOA (Perfluorooctanoic acid)	7.3 ng/L	4 ng/L	1.8×	2023
Columbia, SC COLUMBIA CITY OF (SC4010001) · PWSID SC4010001	PFOS (Perfluorooctane sulfonic acid)	7.2 ng/L	4 ng/L	1.8×	2024
Boca Raton, FL BOCA RATON WTP · PWSID FL4500130	PFOS (Perfluorooctane sulfonic acid)	7.1 ng/L	4 ng/L	1.8×	2025
Pomona - City, Water Dept., CA POMONA - CITY, WATER DEPT. · PWSID CA1910126	PFOA (Perfluorooctanoic acid)	7.1 ng/L	4 ng/L	1.8×	2024
Regional Water Authority, CT REGIONAL WATER AUTHORITY · PWSID CT0930011	PFOA (Perfluorooctanoic acid)	7.1 ng/L	4 ng/L	1.8×	2024
City of Fort Worth, TX CITY OF FORT WORTH · PWSID TX2200012	PFOS (Perfluorooctane sulfonic acid)	7 ng/L	4 ng/L	1.8×	2024
Goodyear Water Department, AZ GOODYEAR WATER DEPARTMENT · PWSID AZ0407094	PFOS (Perfluorooctane sulfonic acid)	7 ng/L	4 ng/L	1.8×	2023
City of Tampa Water Department, FL CITY OF TAMPA WATER DEPARTMENT · PWSID FL6290327	PFOS (Perfluorooctane sulfonic acid)	6.9 ng/L	4 ng/L	1.7×	2023
Columbia, SC COLUMBIA CITY OF (SC4010001) · PWSID SC4010001	PFOA (Perfluorooctanoic acid)	6.9 ng/L	4 ng/L	1.7×	2025
Cws - Visalia, CA CWS - VISALIA · PWSID CA5410016	PFOS (Perfluorooctane sulfonic acid)	6.9 ng/L	4 ng/L	1.7×	2024
Cal-water Service Co.-chico, CA CAL-WATER SERVICE CO.-CHICO · PWSID CA0410002	PFOA (Perfluorooctanoic acid)	6.8 ng/L	4 ng/L	1.7×	2024
Nj American Water - Raritan, NJ NJ AMERICAN WATER - RARITAN · PWSID NJ2004002	PFOS (Perfluorooctane sulfonic acid)	6.8 ng/L	4 ng/L	1.7×	2024
Washington / 0210002 Boonsboro Keedysville, MD BOONSBORO - KEEDYSVILLE · PWSID MD0210002	PFOA (Perfluorooctanoic acid)	6.7 ng/L	4 ng/L	1.7×	2025
Jersey City Mua, NJ JERSEY CITY MUA · PWSID NJ0906001	PFOS (Perfluorooctane sulfonic acid)	6.7 ng/L	4 ng/L	1.7×	2023
Aquarion-eastern Fairfield County, CT AQUARION WATER CO OF CT-MAIN SYSTEM · PWSID CT0150011	PFOS (Perfluorooctane sulfonic acid)	6.6 ng/L	4 ng/L	1.6×	2023
Pompano Beach, FL POMPANO BEACH, CITY OF · PWSID FL4061129	PFOA (Perfluorooctanoic acid)	6.6 ng/L	4 ng/L	1.6×	2023
Charleston, SC CHARLESTON WATER SYSTEM (SC1010001) · PWSID SC1010001	PFOS (Perfluorooctane sulfonic acid)	6.5 ng/L	4 ng/L	1.6×	2025
Gilbert, Town of, AZ GILBERT, TOWN OF · PWSID AZ0407092	PFOA (Perfluorooctanoic acid)	6.5 ng/L	4 ng/L	1.6×	2024
Edmond Pwa, OK EDMOND PWA - ARCADIA · PWSID OK1020723	PFOS (Perfluorooctane sulfonic acid)	6.4 ng/L	4 ng/L	1.6×	2024
Dallas, TX DALLAS WATER UTILITY · PWSID TX0570004	PFOA (Perfluorooctanoic acid)	6.3 ng/L	4 ng/L	1.6×	2023
Regional Water Authority, CT REGIONAL WATER AUTHORITY · PWSID CT0930011	PFOA (Perfluorooctanoic acid)	6.3 ng/L	4 ng/L	1.6×	2023
City of Fort Worth, TX CITY OF FORT WORTH · PWSID TX2200012	PFOA (Perfluorooctanoic acid)	6.2 ng/L	4 ng/L	1.6×	2024
City of Huntington Beach, CA CITY OF HUNTINGTON BEACH · PWSID CA3010053	PFOS (Perfluorooctane sulfonic acid)	6.1 ng/L	4 ng/L	1.5×	2025
Columbia, SC COLUMBIA CITY OF (SC4010001) · PWSID SC4010001	PFOA (Perfluorooctanoic acid)	6.1 ng/L	4 ng/L	1.5×	2024
Newport News, City of, VA NEWPORT NEWS, CITY OF · PWSID VA3700500	PFOS (Perfluorooctane sulfonic acid)	6.1 ng/L	4 ng/L	1.5×	2023
Spokane Valley, WA SPOKANE CITY OF · PWSID WA5383100	PFOS (Perfluorooctane sulfonic acid)	6.1 ng/L	4 ng/L	1.5×	2024
Broken Arrow Municipal Authority, OK BROKEN ARROW MUNICIPAL AUTHORITY · PWSID OK1021508	PFHxS (Perfluorohexane sulfonic acid)	15.2 ng/L	10 ng/L	1.5×	2023
Hollywood, FL HOLLYWOOD, CITY OF · PWSID FL4060642	PFOA (Perfluorooctanoic acid)	6 ng/L	4 ng/L	1.5×	2024
Philadelphia Water Department, PA PHILADELPHIA WATER DEPARTMENT · PWSID PA1510001	PFOS (Perfluorooctane sulfonic acid)	6 ng/L	4 ng/L	1.5×	2024
Fort Myers, FL LEE COUNTY UTILITIES · PWSID FL5364048	PFOS (Perfluorooctane sulfonic acid)	5.9 ng/L	4 ng/L	1.5×	2023
Boca Raton, FL BOCA RATON WTP · PWSID FL4500130	PFOS (Perfluorooctane sulfonic acid)	5.8 ng/L	4 ng/L	1.4×	2024
Durham, City of, NC DURHAM, CITY OF · PWSID NC0332010	PFOS (Perfluorooctane sulfonic acid)	5.8 ng/L	4 ng/L	1.4×	2023
City of Poquoson, VA NORFOLK VA, CITY OF · PWSID VA3710100	PFOS (Perfluorooctane sulfonic acid)	5.8 ng/L	4 ng/L	1.4×	2023
Pomona - City, Water Dept., CA POMONA - CITY, WATER DEPT. · PWSID CA1910126	PFOA (Perfluorooctanoic acid)	5.8 ng/L	4 ng/L	1.4×	2023
City of Lighthouse Point, FL BAGDAD-GARCON POINT WATER SYSTEM · PWSID FL1570042	PFOS (Perfluorooctane sulfonic acid)	5.7 ng/L	4 ng/L	1.4×	2023
Georgetown, TX CITY OF GEORGETOWN · PWSID TX2460001	PFOS (Perfluorooctane sulfonic acid)	5.7 ng/L	4 ng/L	1.4×	2023
Western MWD - Murrieta Division, CA WESTERN MWD - MURRIETA DIVISION · PWSID CA3310036	PFOS (Perfluorooctane sulfonic acid)	5.7 ng/L	4 ng/L	1.4×	2025
Gilbert, Town of, AZ GILBERT, TOWN OF · PWSID AZ0407092	PFOS (Perfluorooctane sulfonic acid)	5.6 ng/L	4 ng/L	1.4×	2023
Hampton, VA LANGLEY AIR FORCE BASE · PWSID VA3650350	PFOS (Perfluorooctane sulfonic acid)	5.6 ng/L	4 ng/L	1.4×	2023
Raleigh, City of, NC RALEIGH, CITY OF · PWSID NC0392010	PFOS (Perfluorooctane sulfonic acid)	5.6 ng/L	4 ng/L	1.4×	2023
North Charleston, SC DCWS ASHLEY PHOSPHATE (1820008) · PWSID SC1820008	PFOS (Perfluorooctane sulfonic acid)	5.5 ng/L	4 ng/L	1.4×	2024
Western MWD - Murrieta Division, CA WESTERN MWD - MURRIETA DIVISION · PWSID CA3310036	PFOA (Perfluorooctanoic acid)	5.5 ng/L	4 ng/L	1.4×	2025
City of Lighthouse Point, FL BAGDAD-GARCON POINT WATER SYSTEM · PWSID FL1570042	PFOS (Perfluorooctane sulfonic acid)	5.3 ng/L	4 ng/L	1.3×	2024
Newark Water Department, NJ NEWARK WATER DEPARTMENT, NJ · PWSID NJ0714001	PFOA (Perfluorooctanoic acid)	5.3 ng/L	4 ng/L	1.3×	2023
North Miami Beach, FL NORTH MIAMI BEACH · PWSID FL4131618	PFOA (Perfluorooctanoic acid)	5.3 ng/L	4 ng/L	1.3×	2024
Ontario Municipal Utilities Company, CA ONTARIO MUNICIPAL UTILITIES COMPANY · PWSID CA3610034	PFOS (Perfluorooctane sulfonic acid)	5.2 ng/L	4 ng/L	1.3×	2023
City of Vacaville, CA CITY OF VACAVILLE · PWSID CA4810008	PFOA (Perfluorooctanoic acid)	5.1 ng/L	4 ng/L	1.3×	2024
Dallas, TX DALLAS WATER UTILITY · PWSID TX0570004	PFOS (Perfluorooctane sulfonic acid)	5.1 ng/L	4 ng/L	1.3×	2023
Coral Springs, FL CORAL SPRINGS, CITY OF · PWSID FL4060290	PFOA (Perfluorooctanoic acid)	5 ng/L	4 ng/L	1.3×	2025
Manchester, NH MANCHESTER WATER WORKS, NH · PWSID NH1471010	PFOA (Perfluorooctanoic acid)	5 ng/L	4 ng/L	1.3×	2023
Bakersfield, City of, CA BAKERSFIELD, CITY OF · PWSID CA1510031	PFOS (Perfluorooctane sulfonic acid)	4.9 ng/L	4 ng/L	1.2×	2024
Georgetown, TX CITY OF GEORGETOWN · PWSID TX2460001	PFOA (Perfluorooctanoic acid)	4.9 ng/L	4 ng/L	1.2×	2023
Meridian Water Dept, ID MERIDIAN WATER DEPT · PWSID ID4010097	PFOS (Perfluorooctane sulfonic acid)	4.9 ng/L	4 ng/L	1.2×	2025
Cambridge, MA CAMBRIDGE WATER DEPARTMENT · PWSID MA3049000	PFOA (Perfluorooctanoic acid)	4.8 ng/L	4 ng/L	1.2×	2023
League City, TX CITY OF LEAGUE CITY · PWSID TX0840007	PFOS (Perfluorooctane sulfonic acid)	4.8 ng/L	4 ng/L	1.2×	2024
City of Stockton, CA CITY OF STOCKTON · PWSID CA3910012	PFOS (Perfluorooctane sulfonic acid)	4.8 ng/L	4 ng/L	1.2×	2023
Coral Springs, FL CORAL SPRINGS, CITY OF · PWSID FL4060290	PFOA (Perfluorooctanoic acid)	4.8 ng/L	4 ng/L	1.2×	2024
Goodyear Water Department, AZ GOODYEAR WATER DEPARTMENT · PWSID AZ0407094	PFOA (Perfluorooctanoic acid)	4.8 ng/L	4 ng/L	1.2×	2024
South Bend Water Works, IN SOUTH BEND WATER WORKS · PWSID IN5271014	PFOA (Perfluorooctanoic acid)	4.8 ng/L	4 ng/L	1.2×	2024
Cal-water Service Co.-chico, CA CAL-WATER SERVICE CO.-CHICO · PWSID CA0410002	PFHxS (Perfluorohexane sulfonic acid)	11.8 ng/L	10 ng/L	1.2×	2023
Brownsville, TX BROWNSVILLE PUBLIC UTILITIES BOARD · PWSID TX0310001	PFOA (Perfluorooctanoic acid)	4.7 ng/L	4 ng/L	1.2×	2025
Huntsville, AL HUNTSVILLE UTILITIES · PWSID AL0000882	PFOA (Perfluorooctanoic acid)	4.7 ng/L	4 ng/L	1.2×	2023
Lynn, MA LYNN WATER AND SEWER COMM · PWSID MA3163000	PFOA (Perfluorooctanoic acid)	4.7 ng/L	4 ng/L	1.2×	2023
Western MWD - Murrieta Division, CA WESTERN MWD - MURRIETA DIVISION · PWSID CA3310036	PFOA (Perfluorooctanoic acid)	4.7 ng/L	4 ng/L	1.2×	2024
Arlington, TX CITY OF ARLINGTON · PWSID TX2200001	PFOS (Perfluorooctane sulfonic acid)	4.6 ng/L	4 ng/L	1.1×	2024
City of Tampa Water Department, FL CITY OF TAMPA WATER DEPARTMENT · PWSID FL6290327	PFOA (Perfluorooctanoic acid)	4.6 ng/L	4 ng/L	1.1×	2023
Catoosa Utility District Authority, TN LENOIR CITY UTILITY BOARD · PWSID TN0000396	PFOS (Perfluorooctane sulfonic acid)	4.6 ng/L	4 ng/L	1.1×	2024
New Orleans Algiers Water Works, LA NEW ORLEANS ALGIERS WATER WORKS · PWSID LA1071001	PFOS (Perfluorooctane sulfonic acid)	4.5 ng/L	4 ng/L	1.1×	2023
Park City, City of, KS PARK CITY, CITY OF · PWSID KS2017303	PFOS (Perfluorooctane sulfonic acid)	4.5 ng/L	4 ng/L	1.1×	2024
Anchorage, AK MOA MUNICIPALITY OF ANCHORAGE · PWSID AK2210906	PFHxS (Perfluorohexane sulfonic acid)	11.2 ng/L	10 ng/L	1.1×	2023
Charleston, SC CHARLESTON WATER SYSTEM (SC1010001) · PWSID SC1010001	PFOA (Perfluorooctanoic acid)	4.4 ng/L	4 ng/L	1.1×	2025
City of Tampa Water Department, FL CITY OF TAMPA WATER DEPARTMENT · PWSID FL6290327	PFOS (Perfluorooctane sulfonic acid)	4.4 ng/L	4 ng/L	1.1×	2024
El Monte-city, Water Dept., CA EL MONTE-CITY, WATER DEPT. · PWSID CA1910038	PFOS (Perfluorooctane sulfonic acid)	4.4 ng/L	4 ng/L	1.1×	2024
Hollywood, FL HOLLYWOOD, CITY OF · PWSID FL4060642	PFOA (Perfluorooctanoic acid)	4.4 ng/L	4 ng/L	1.1×	2023
Inglewood- City, Water Dept., CA INGLEWOOD- CITY, WATER DEPT. · PWSID CA1910051	PFOA (Perfluorooctanoic acid)	4.4 ng/L	4 ng/L	1.1×	2024
Lca Allentown Division, PA LCA ALLENTOWN DIVISION · PWSID PA3390024	PFOS (Perfluorooctane sulfonic acid)	4.4 ng/L	4 ng/L	1.1×	2023
North Charleston, SC DCWS ASHLEY PHOSPHATE (1820008) · PWSID SC1820008	PFOA (Perfluorooctanoic acid)	4.3 ng/L	4 ng/L	1.1×	2024
Aquarion-eastern Fairfield County, CT AQUARION WATER CO OF CT-MAIN SYSTEM · PWSID CT0150011	PFOA (Perfluorooctanoic acid)	4.2 ng/L	4 ng/L	1.1×	2024
Arlington, TX CITY OF ARLINGTON · PWSID TX2200001	PFOS (Perfluorooctane sulfonic acid)	4.2 ng/L	4 ng/L	1.1×	2023
Cws - Visalia, CA CWS - VISALIA · PWSID CA5410016	PFOA (Perfluorooctanoic acid)	4.2 ng/L	4 ng/L	1.1×	2024
Hesperia Wd, CA HESPERIA WD · PWSID CA3610024	PFHxS (Perfluorohexane sulfonic acid)	10.5 ng/L	10 ng/L	1.1×	2023
High Point, City of, NC HIGH POINT, CITY OF · PWSID NC0241020	PFOA (Perfluorooctanoic acid)	4.2 ng/L	4 ng/L	1.1×	2025
Fort Myers, FL LEE COUNTY UTILITIES · PWSID FL5364048	PFOA (Perfluorooctanoic acid)	4.2 ng/L	4 ng/L	1.1×	2023
Sugar Land, TX CITY OF SUGAR LAND · PWSID TX0790005	PFOA (Perfluorooctanoic acid)	4.1 ng/L	4 ng/L	1.0×	2023
Durham, City of, NC DURHAM, CITY OF · PWSID NC0332010	PFOA (Perfluorooctanoic acid)	4.1 ng/L	4 ng/L	1.0×	2023
Western MWD - Murrieta Division, CA WESTERN MWD - MURRIETA DIVISION · PWSID CA3310036	PFOS (Perfluorooctane sulfonic acid)	4.1 ng/L	4 ng/L	1.0×	2024
Goodyear Water Department, AZ GOODYEAR WATER DEPARTMENT · PWSID AZ0407094	PFOA (Perfluorooctanoic acid)	4 ng/L	4 ng/L	1.0×	2023
New Orleans Algiers Water Works, LA NEW ORLEANS ALGIERS WATER WORKS · PWSID LA1071001	PFOA (Perfluorooctanoic acid)	4 ng/L	4 ng/L	1.0×	2023
Riverside, City of, CA RIVERSIDE, CITY OF · PWSID CA3310031	PFOS (Perfluorooctane sulfonic acid)	4 ng/L	4 ng/L	1.0×	2023

Data: EPA UCMR5 occurrence dataset, updated January 2026. Limits: EPA PFAS National Primary Drinking Water Regulation, April 2024. Lists only systems with a published Water Map landing page; systems we've loaded UCMR5 data for but don't yet have a city page will appear as we expand coverage.