PFAS in Maryland drinking water
73 community water systems tested
19.2%
of tested systems detected PFOA or PFOS
(14/73)
(14/73)
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.
| System | City | Population | PFAS (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 |