What is PFAS?
Water suppliers
PFAS value per supplier, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Suppliers that detected PFOA or PFOS
are highlighted and listed first. “Not detected” means the contaminant was measured but
not found.
| Supplier | City | Population | PFAS (ug/L) |
|---|---|---|---|
| Town of Thurmont | Thurmont | 6,200 | 0.0480 µg/L |
| Town of Elkton | Elkton | 15,625 | 0.0233 µg/L |
| City of Salisbury | Salisbury | 30,343 | 0.0200 µg/L |
| Town of Mount Airy | Mount Airy | 9,890 | 0.0127 µg/L |
| City of Westminster | Westminster | 35,256 | 0.0124 µg/L |
| City of Taneytown | Taneytown | 6,750 | 0.0107 µg/L |
| Maryland American Water Company | Bel Air | 13,200 | 0.0093 µg/L |
| Town of Hampstead | Hampstead | 6,600 | 0.0091 µg/L |
| City of Aberdeen | Aberdeen | 18,006 | 0.0086 µg/L |
| Boonsboro - Keedysville | Boonsboro | 4,250 | 0.0067 µg/L |
| Town of Poolesville | Poolesville | 6,005 | 0.0065 µg/L |
| Town of Middletown | Middletown | 4,288 | 0.0061 µg/L |
| Town of Manchester | Manchester | 4,954 | 0.0047 µg/L |
| City of Fruitland | Fruitland | 5,907 | 0.0041 µg/L |
| Washington Suburban Sanitary Commission | — | 1,900,000 | Not detected |
| City of Baltimore | — | 1,600,000 | Not detected |
| Glen Burnie-Broadneck | Millersville | 290,606 | Not detected |
| Howard County D.P.W. Distribution | — | 286,158 | Not detected |
| Harford County D.P.W. | Abingdon | 104,567 | Not detected |
| City of Hagerstown | Hagerstown | 92,200 | Not detected |
| New Design - Frederick County | Frederick | 74,911 | Not detected |
| Crofton-Odenton | Millersville | 62,986 | Not detected |
| Fort George G. Meade | Fort Meade | 62,234 | Not detected |
| City of Frederick | Frederick | 54,000 | Not detected |
| Lexington Park | California | 43,030 | Not detected |
| City of Annapolis | Annapolis | 35,000 | Not detected |
| Town of Ocean City | Ocean City | 30,000 | Not detected |
| City of Cumberland | Cumberland | 27,039 | Not detected |
| Broad Creek | Millersville | 26,033 | Not detected |
| City of Bowie | Bowie | 25,000 | Not detected |
| Freedom District | Westminster | 24,867 | Not detected |
| Patuxent Naval Air Station (Navfac-Wash) | Patuxent River | 22,000 | Not detected |
| Easton Utilities | Easton | 17,357 | Not detected |
| Chapel Hill - Aberdeen Proving Grounds | Aberdeen | 15,000 | Not detected |
| City of Cambridge Water | Cambridge | 15,000 | Not detected |
| City of Havre De Grace | Havre De Grace | 14,000 | Not detected |
| Ocean Pines | Berlin | 11,890 | Not detected |
| Town of La Plata | La Plata | 11,535 | Not detected |
| City of Frostburg | Frostburg | 11,000 | Not detected |
| Chesapeake Ranch Estates | Lusby | 9,500 | Not detected |
| Stevensville | Stevensville | 9,155 | Not detected |
| U.S. Naval Academy | Annapolis | 8,700 | Not detected |
| Town of North East | North East | 8,600 | Not detected |
| Town of Walkersville | Walkersville | 8,440 | Not detected |
| Fort Detrick | Frederick | 7,900 | Not detected |
| City of Brunswick | Brunswick | 7,312 | Not detected |
| Mystic Harbour | Berlin | 5,945 | Not detected |
| Eastern Region Allegany Distrib. System | Cumberland | 5,703 | Not detected |
| Lavale Sanitary Commission | Lavale | 5,500 | Not detected |
| Maryland American Water--Severn System | — | 5,447 | Not detected |
| Town of Chestertown | Chestertown | 5,400 | Not detected |
| Town of Chesapeake Beach | Chesapeake Beach | 5,000 | Not detected |
| Midland-Lonaconing | Lonaconing | 5,000 | Not detected |
| Western Region Allegany Distrib. System | Cumberland | 4,955 | Not detected |
| Town of Delmar | Delmar | 4,500 | Not detected |
| Town of Denton | Denton | 4,500 | Not detected |
| Town of Berlin | Berlin | 4,500 | Not detected |
| Town of Perryville | Perryville | 4,413 | Not detected |
| Prince Frederick | Prince Frederick | 4,371 | Not detected |
| Town of Indian Head | Indian Head | 4,100 | Not detected |
| City of Pocomoke City | Pocomoke City | 4,100 | Not detected |
| The Provinces | — | 3,991 | Not detected |
| Solomons | Prince Frederick | 3,811 | Not detected |
| Town of Centreville | Centreville | 3,322 | Not detected |
| Naval Support Facility, Indian Head | Indian Head | 3,321 | Not detected |
| Town of Princess Anne | Princess Anne | 3,300 | Not detected |
| Delmar Utility Comm (Tn of Delmar) | Delmar | 2,027 | Not detected |
| Town of Hancock | Hancock | 1,921 | Not detected |
| Swann Keys | Fenwick Island | 1,764 | Not detected |
| Piney Point | California | 672 | Not detected |
| Town of Millington | Millington | 625 | Not detected |
| Buel Hill Estates (Dba Eagles Landing) | — | 400 | Not detected |
| White Plains 2 Mhp/Jack Blair | — | 70 | Not detected |