By State · NH
Based on EPA UCMR 5 testing of 23 public water systems with PFAS detected in New Hampshire.
See New Hampshire on the national heatmapState totals reflect systems with at least one PFAS detection in UCMR 5 (the canonical EPA dataset). The 6,151 national total includes ~123 additional systems in US territories and on tribal lands not browsable as state pages.
Most contaminated in New Hampshire
16 New Hampshire water systems tested above EPA PFAS limits. The most severe is HUDSON WATER DEPT, where PFOA measured 9.0 ppt — 2.3× the federal limit.
State context
Industrial context
New Hampshire is one of the most-studied PFAS contamination states in the US. The former Pease Air Force Base (Portsmouth, closed 1991) was one of the first sites where AFFF-related PFOS in drinking water was systematically measured; the resulting state-led response set early national precedent.
Regulatory stance
New Hampshire was the first US state to set its own drinking-water MCL for PFAS in 2019 — stricter than what was federal practice at the time. The state Department of Environmental Services operates one of the most-resourced state PFAS programs in the country.
Notable sites
Pease Air National Guard Base, the Saint-Gobain Performance Plastics facility in Merrimack, and the towns of Litchfield and Bedford have all had documented PFAS impacts requiring municipal action.
Editorial summary compiled from public DoD, EPA, and state agency disclosures. Not a comprehensive site inventory — for the authoritative list of PFAS investigation locations in New Hampshire, consult your state environmental agency.
Systems with detections · EPA UCMR 5 (2023–2025)
Get specific results for your neighborhood's water utility.
City overviews aggregate every utility and ZIP code in the area. Don't see your city? Use the ZIP lookup above — every New Hampshire ZIP has a result.
| Water System ↕ | PWSID | PFAS Detected ↕ | Above MCL ↕ | Risk |
|---|---|---|---|---|
| JAFFREY WATER WORKS Groundwater | NH1221010 | 3 | 3 | High Risk |
| PORTSMOUTH WATER WORKS Surface Water | NH1951010 | 9 | 2 | High Risk |
| HAMPSTEAD AREA WATER Groundwater | NH1031010 | 6 | 2 | High Risk |
| AQUARION WATER/NH Groundwater | NH1051010 | 6 | 2 | High Risk |
| RYE WATER DIST Groundwater | NH2041010 | 4 | 2 | High Risk |
| SEABROOK WATER DEPT Groundwater | NH2111010 | 3 | 2 | High Risk |
| EXETER WATER DEPT Surface Water | NH0801010 | 7 | 1 | High Risk |
| PEU/LITCHFIELD Groundwater | NH1371010 | 4 | 1 | High Risk |
| HUDSON WATER DEPT Groundwater | NH1201010 | 3 | 1 | High Risk |
| SALEM WATER DEPT Surface Water | NH2051010 | 3 | 1 | High Risk |
| CENTRAL HOOKSETT WATER PCT Surface Water | NH1181010 | 2 | 1 | High Risk |
| PEMBROKE WATER WORKS Groundwater | NH1861010 | 2 | 1 | High Risk |
| LITTLE POND ESTATES Surface Water | NH0192080 | 1 | 1 | High Risk |
| DERRY WATER DEPT Surface Water | NH0611010 | 1 | 1 | High Risk |
| PEU/LONDONDERRY Surface Water | NH1391010 | 1 | 1 | High Risk |
| MANCHESTER WATER WORKS, NH Surface Water | NH1471010 | 1 | 1 | High Risk |
| RAYMOND WATER DEPT Groundwater | NH1971010 | 2 | 0 | Low Level |
| BRISTOL WATER WORKS Groundwater | NH0301010 | 1 | 0 | Low Level |
| SACO RIVER FOREST Groundwater | NH0512120 | 1 | 0 | Low Level |
| DOVER WATER DEPT, NH Groundwater | NH0651010 | 1 | 0 | Low Level |
| VILLAGE DISTRICT OF EIDELWEISS Groundwater | NH1461010 | 1 | 0 | Low Level |
| PWW/FARLEY RD ESTATES Groundwater | NH1622010 | 1 | 0 | Low Level |
| PEASE TRADE PORT Groundwater | NH1951020 | 1 | 0 | Low Level |
Click any row to see ZIP-level details. Click PWSID to see the full utility page.
Test your water
EPA UCMR 5 tested 23 public water systems in New Hampshire — but at the utility entry point, not your tap. Aging pipes and indoor plumbing can change what reaches your home, and private wells aren't covered by UCMR 5 at all. To find out what's actually in your water, test it with a certified lab.
How PFAS water testing works
EPA Method 537.1 in plain English — what a certified lab actually measures
Order a certified mail-in test kit
PFAS mail-in kits from about $85 (Cyclopure, Tap Score)
On a private well in New Hampshire?
Wells aren't covered by EPA testing — your own testing guide
New Hampshire testing resources
Own state limitsCompiled from official New Hampshire state sources. Programs and eligibility change — confirm current details with the agency.
