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PFAS in New Hampshire drinking water

48 community water systems tested

31.3%
of tested systems detected PFOA or PFOS
(15/48)

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)
HUDSON WATER DEPT HUDSON 16,700 0.0090 ug/L
SALEM WATER DEPT SALEM 21,000 0.0085 ug/L
RYE WATER DIST RYE 4,300 0.0083 ug/L
LITCHFIELD LITCHFIELD 6,920 0.0081 ug/L
SEABROOK WATER DEPT SEABROOK 14,000 0.0080 ug/L
HAMPSTEAD AREA WATER HAMPSTEAD 7,153 0.0075 ug/L
PORTSMOUTH WATER WORKS PORTSMOUTH 33,000 0.0070 ug/L
JAFFREY WATER WORKS JAFFREY 3,800 0.0066 ug/L
PEMBROKE WATER WORKS PEMBROKE 5,200 0.0065 ug/L
LONDONDERRY LONDONDERRY 6,255 0.0064 ug/L
EXETER WATER DEPT EXETER 12,236 0.0060 ug/L
LITTLE POND ESTATES BEDFORD 3,000 0.0054 ug/L
MANCHESTER WATER WORKS MANCHESTER 123,500 0.0050 ug/L
CENTRAL HOOKSETT WATER PCT HOOKSETT 4,650 0.0049 ug/L
DERRY WATER DEPT DERRY 17,370 0.0046 ug/L
PENNICHUCK WATER WORKS NASHUA 88,853 Not detected
CONCORD WATER DEPT CONCORD 44,215 Not detected
KEENE WATER DEPT KEENE 30,000 Not detected
DOVER WATER DEPT DOVER 29,000 Not detected
MERRIMACK VILLAGE DIST MERRIMACK 25,500 Not detected
ROCHESTER WATER DEPT ROCHESTER 25,000 Not detected
LACONIA WATER WORKS LACONIA 17,125 Not detected
UNH/DURHAM WATER SYS DURHAM 16,000 Not detected
LEBANON WATER DEPT LEBANON 13,600 Not detected
SOMERSWORTH WATER WORKS SOMERSWORTH 12,200 Not detected
PEASE TRADE PORT PORTSMOUTH 9,900 Not detected
HANOVER WATER DEPT HANOVER 9,600 Not detected
BERLIN WATER WORKS BERLIN 9,575 Not detected
MILFORD WATER UTILITIES DEPT MILFORD 9,500 Not detected
CLAREMONT WATER DEPT CLAREMONT 9,000 Not detected
FRANKLIN WATER WORKS FRANKLIN 7,200 Not detected
PLYMOUTH VLG WATER AND SEWER PLYMOUTH 6,700 Not detected
LITTLETON WATER AND LIGHT LITTLETON 6,500 Not detected
WOLFEBORO WATER AND SEWER WOLFEBORO 6,000 Not detected
NORTH CONWAY WATER PCT CONWAY 5,500 Not detected
NEWMARKET WATER WORKS NEWMARKET 5,030 Not detected
NEWPORT WATER WORKS NEWPORT 5,000 Not detected
PETERBOROUGH WATER WORKS PETERBOROUGH 4,500 Not detected
LOWER BARTLETT WATER PCT BARTLETT 3,850 Not detected
PENACOOK BOSCAWEN WATER PCT BOSCAWEN 3,800 Not detected
BRISTOL WATER WORKS BRISTOL 3,575 Not detected
VILLAGE DIST OF EASTMAN GRANTHAM 3,400 Not detected
RAYMOND WATER DEPT RAYMOND 3,300 Not detected
NEW LONDON SPRINGFIELD WATER NEW LONDON 3,250 Not detected
VILLAGE DISTRICT OF EIDELWEISS MADISON 1,200 Not detected
RIVER RUN CONDOS BARTLETT 750 Not detected
FARLEY RD ESTATES NASHUA 85 Not detected
SACO RIVER FOREST CONWAY 63 Not detected