Drinking water / NH
PFAS in New Hampshire drinking water
51 New Hampshire public water systems tested under UCMR5. 18 detected at least one PFAS compound; 33 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.
| Water system | Serves | Highest results (ng/L) | Reading |
|---|---|---|---|
| AQUARION WATER/NH NH1051010 | Rockingham | PFPeA 25.1PFHxA 10.1PFBA 5PFOA 4.7 * | above final limit |
| CENTRAL HOOKSETT WATER PCT NH1181010 | Merrimack | PFBA 28PFOA 4.9 * | above final limit |
| DERRY WATER DEPT NH0611010 | Rockingham | PFOA 4.6 * | above final limit |
| EXETER WATER DEPT NH0801010 | Rockingham | PFBA 13PFOA 6 *PFPeA 4PFHxA 4 | above final limit |
| HAMPSTEAD AREA WATER NH1031010 | Rockingham | PFOS 7.5 *PFOA 7.2 *PFBS 7.2PFHxA 5.1 | above final limit |
| HUDSON WATER DEPT NH1201010 | Hillsborough | PFOA 9 *PFPeA 5PFHxA 4 | above final limit |
| JAFFREY WATER WORKS NH1221010 | Cheshire | PFHxS 11PFOA 6.6 *PFOS 5.6 * | above final limit |
| LITTLE POND ESTATES NH0192080 | Hillsborough | PFOA 5.4 * | above final limit |
| MANCHESTER WATER WORKS, NH NH1471010 | Hillsborough | PFOA 5 * | above final limit |
| PEMBROKE WATER WORKS NH1861010 | Merrimack | PFOS 6.5 *PFBS 5.9 | above final limit |
| PEU/LITCHFIELD NH1371010 | Hillsborough | PFOA 8.1 *PFPeA 7.8PFHxA 5.4PFHpA 3 | above final limit |
| PEU/LONDONDERRY NH1391010 | Rockingham | PFOA 6.4 * | above final limit |
| PORTSMOUTH WATER WORKS NH1951010 | Rockingham | PFBS 9PFPeA 7PFOA 7 *PFHxA 6 | above final limit |
| RYE WATER DIST NH2041010 | Rockingham | PFOA 8.3 *PFOS 7.8 *PFHxA 3.6PFPeA 3.1 | above final limit |
| SALEM WATER DEPT NH2051010 | Rockingham | PFOA 8.5 *PFHxA 3.8PFPeA 3.7 | above final limit |
| SEABROOK WATER DEPT NH2111010 | Rockingham | PFOA 8 *PFOS 5.3 *PFHxA 4.4 | above final limit |
| PEASE TRADE PORT NH1951020 | Rockingham | PFBA 20.6 | detected |
| RAYMOND WATER DEPT NH1971010 | Rockingham | PFHxA 3.1 | detected |
* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.
Systems with no PFAS detected
33 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- BERLIN WATER WORKS
- BRISTOL WATER WORKS
- CLAREMONT WATER DEPT
- CONCORD WATER DEPT, NH
- DOVER WATER DEPT, NH
- FRANKLIN WATER WORKS
- HANOVER WATER DEPT
- KEENE WATER DEPT
- LACONIA WATER WORKS
- LEBANON WATER DEPT
- LITTLETON WATER AND LIGHT DEPT
- LOWER BARTLETT WATER PCT
- MERRIMACK VILLAGE DIST
- MILFORD WATER UTILITIES DEPT
- NEW LONDON SPRINGFIELD WATER
- NEWMARKET WATER WORKS
- NEWPORT WATER WORKS
- NORTH CONWAY WATER PCT
- PENACOOK BOSCAWEN WATER PCT
- PENNICHUCK WATER WORKS
- PETERBOROUGH WATER WORKS
- PLYMOUTH VLG WATER AND SEWER
- PWW/FARLEY RD ESTATES
- RIVER RUN CONDOS
- ROCHESTER WATER DEPT
- SACO RIVER FOREST
- SOMERSWORTH WATER WORKS
- UNH/DURHAM WATER SYS
- UNITED NATURAL FOODS
- VILLAGE DIST OF EASTMAN
- VILLAGE DISTRICT OF EIDELWEISS
- WOLFEBORO WATER AND SEWER
- YANKEE BOOK PEDDLER
A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options