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PFAS in Maryland drinking water

73 community water systems tested

19.2%
of tested systems detected PFOA or PFOS
(14/73)

PFAS — “forever chemicals” — are synthetic compounds that accumulate in the body and are linked to cancer, liver damage and immune effects. In 2024 the EPA set enforceable limits of 4 parts per trillion each for PFOA and PFOS. These are the only nationwide PFAS measurements, from the EPA’s UCMR-5 program.

Water systems

PFAS value per system, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Systems that detected PFOA or PFOS are highlighted and listed first. “Not detected” means the contaminant was measured but not found.
SystemCityPopulationPFAS (ug/L)
TOWN OF THURMONT 6,200 0.0480 ug/L
TOWN OF ELKTON 15,625 0.0233 ug/L
CITY OF SALISBURY 30,343 0.0200 ug/L
TOWN OF MOUNT AIRY 9,890 0.0127 ug/L
CITY OF WESTMINSTER 35,256 0.0124 ug/L
CITY OF TANEYTOWN 6,750 0.0107 ug/L
MARYLAND AMERICAN WATER COMPANY 13,200 0.0093 ug/L
TOWN OF HAMPSTEAD 6,600 0.0091 ug/L
CITY OF ABERDEEN 18,006 0.0086 ug/L
BOONSBORO - KEEDYSVILLE 4,250 0.0067 ug/L
TOWN OF POOLESVILLE 6,005 0.0065 ug/L
TOWN OF MIDDLETOWN 4,288 0.0061 ug/L
TOWN OF MANCHESTER 4,954 0.0047 ug/L
CITY OF FRUITLAND 5,907 0.0041 ug/L
WASHINGTON SUBURBAN SANITARY COMMISSION 1,900,000 Not detected
CITY OF BALTIMORE 1,600,000 Not detected
GLEN BURNIE-BROADNECK 290,606 Not detected
HOWARD COUNTY D.P.W. DISTRIBUTION 286,158 Not detected
HARFORD COUNTY D.P.W. 104,567 Not detected
CITY OF HAGERSTOWN 92,200 Not detected
NEW DESIGN - FREDERICK COUNTY 74,911 Not detected
CROFTON-ODENTON 62,986 Not detected
FORT GEORGE G. MEADE 62,234 Not detected
CITY OF FREDERICK 54,000 Not detected
LEXINGTON PARK 43,030 Not detected
CITY OF ANNAPOLIS 35,000 Not detected
TOWN OF OCEAN CITY 30,000 Not detected
CITY OF CUMBERLAND 27,039 Not detected
BROAD CREEK 26,033 Not detected
CITY OF BOWIE 25,000 Not detected
FREEDOM DISTRICT 24,867 Not detected
PATUXENT NAVAL AIR STATION (NAVFAC-WASH) 22,000 Not detected
EASTON UTILITIES 17,357 Not detected
CHAPEL HILL - ABERDEEN PROVING GROUNDS 15,000 Not detected
CITY OF CAMBRIDGE WATER 15,000 Not detected
CITY OF HAVRE DE GRACE 14,000 Not detected
OCEAN PINES 11,890 Not detected
TOWN OF LA PLATA 11,535 Not detected
CITY OF FROSTBURG 11,000 Not detected
CHESAPEAKE RANCH ESTATES 9,500 Not detected
STEVENSVILLE 9,155 Not detected
U.S. NAVAL ACADEMY 8,700 Not detected
TOWN OF NORTH EAST 8,600 Not detected
TOWN OF WALKERSVILLE 8,440 Not detected
FORT DETRICK 7,900 Not detected
CITY OF BRUNSWICK 7,312 Not detected
MYSTIC HARBOUR 5,945 Not detected
EASTERN REGION ALLEGANY DISTRIB. SYSTEM 5,703 Not detected
LAVALE SANITARY COMMISSION 5,500 Not detected
MARYLAND AMERICAN WATER--SEVERN SYSTEM 5,447 Not detected
TOWN OF CHESTERTOWN 5,400 Not detected
TOWN OF CHESAPEAKE BEACH 5,000 Not detected
MIDLAND-LONACONING 5,000 Not detected
WESTERN REGION ALLEGANY DISTRIB. SYSTEM 4,955 Not detected
TOWN OF DELMAR 4,500 Not detected
TOWN OF DENTON 4,500 Not detected
TOWN OF BERLIN 4,500 Not detected
TOWN OF PERRYVILLE 4,413 Not detected
PRINCE FREDERICK 4,371 Not detected
TOWN OF INDIAN HEAD 4,100 Not detected
CITY OF POCOMOKE CITY 4,100 Not detected
THE PROVINCES 3,991 Not detected
SOLOMONS 3,811 Not detected
TOWN OF CENTREVILLE 3,322 Not detected
NAVAL SUPPORT FACILITY, INDIAN HEAD 3,321 Not detected
TOWN OF PRINCESS ANNE 3,300 Not detected
DELMAR UTILITY COMM (TN OF DELMAR) DELMAR 2,027 Not detected
TOWN OF HANCOCK 1,921 Not detected
SWANN KEYS FENWICK ISLAND 1,764 Not detected
PINEY POINT 672 Not detected
TOWN OF MILLINGTON 625 Not detected
BUEL HILL ESTATES (DBA EAGLES LANDING) 400 Not detected
WHITE PLAINS 2 MHP/JACK BLAIR 70 Not detected