EPA UCMR 5 results for 51 public water systems. 18 had at least one PFAS detected; 16 had a highest single PFOA or PFOS result above 4.0 ppt.
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
| Water system | Serves | PFOA max (ppt) | PFOS max (ppt) | PFAS detected |
|---|---|---|---|---|
| Aquarion Water/Nh NH1051010 | Hampton | 4.7 | 4.5 | 5 |
| Berlin Water Works NH0231010 | Berlin | ND | ND | 0 |
| Bristol Water Works NH0301010 | Bristol | ND | ND | 0 |
| Central Hooksett Water PCT NH1181010 | Hooksett | 4.9 | ND | 2 |
| Claremont Water Dept NH0461010 | Claremont | ND | ND | 0 |
| Concord Water Dept, NH NH0501010 | Concord | ND | ND | 0 |
| Derry Water Dept NH0611010 | Derry | 4.6 | ND | 1 |
| Dover Water Dept, NH NH0651010 | Dover | ND | ND | 0 |
| Exeter Water Dept NH0801010 | Exeter | 6 | 4 | 7 |
| Franklin Water Works NH0851010 | Franklin | ND | ND | 0 |
| Hampstead Area Water NH1031010 | Hampstead | 7.2 | 7.5 | 5 |
| Hanover Water Dept NH1071010 | Hanover | ND | ND | 0 |
| Hudson Water Dept NH1201010 | Hudson | 9 | ND | 3 |
| Jaffrey Water Works NH1221010 | Jaffrey | 6.6 | 5.6 | 3 |
| Keene Water Dept NH1241010 | Keene | ND | ND | 0 |
| Laconia Water Works NH1281010 | Laconia | ND | ND | 0 |
| Lebanon Water Dept NH1321010 | Lebanon | ND | ND | 0 |
| Little Pond Estates NH0192080 | Bedford | 5.4 | ND | 1 |
| Littleton Water and Light Dept NH1381010 | Littleton | ND | ND | 0 |
| Lower Bartlett Water PCT NH0161020 | Bartlett | ND | ND | 0 |
| Manchester Water Works, NH NH1471010 | Manchester | 5 | ND | 1 |
| Merrimack Village Dist NH1531010 | Merrimack | ND | ND | 0 |
| Milford Water Utilities Dept NH1561010 | Milford | ND | ND | 0 |
| New London Springfield Water NH1721010 | New London | ND | ND | 0 |
| Newmarket Water Works NH1731010 | Newmarket | ND | ND | 0 |
| Newport Water Works NH1741010 | Newport | ND | ND | 0 |
| North Conway Water PCT NH0511030 | Conway | ND | ND | 0 |
| Pease Trade Port NH1951020 | Portsmouth | ND | ND | 1 |
| Pembroke Water Works NH1861010 | Pembroke | ND | 6.5 | 2 |
| Penacook Boscawen Water PCT NH0251010 | Boscawen | ND | ND | 0 |
| Pennichuck Water Works NH1621010 | Nashua | ND | ND | 0 |
| Peterborough Water Works NH1871010 | Peterborough | ND | ND | 0 |
| Peu/Litchfield NH1371010 | Litchfield | 8.1 | ND | 4 |
| Peu/Londonderry NH1391010 | Londonderry | 6.4 | ND | 1 |
| Plymouth VLG Water and Sewer NH1941010 | Plymouth | ND | ND | 0 |
| Portsmouth Water Works NH1951010 | Portsmouth | 7 | 5 | 8 |
| Pww/Farley Rd Estates NH1622010 | Nashua | ND | ND | 0 |
| Raymond Water Dept NH1971010 | Raymond | ND | ND | 1 |
| River Run Condos NH0162170 | Bartlett | ND | ND | 0 |
| Rochester Water Dept NH2001010 | Rochester | ND | ND | 0 |
| Rye Water Dist NH2041010 | Rye | 8.3 | 7.8 | 4 |
| Saco River Forest NH0512120 | Conway | ND | ND | 0 |
| Salem Water Dept NH2051010 | Salem | 8.5 | ND | 3 |
| Seabrook Water Dept NH2111010 | Seabrook | 8 | 5.3 | 3 |
| Somersworth Water Works NH2151010 | Somersworth | ND | ND | 0 |
| Unh/Durham Water Sys NH0691010 | Durham | ND | ND | 0 |
| United Natural Foods NH0446020 | Chesterfield | ND | ND | 0 |
| Village Dist of Eastman NH0951010 | Grantham | ND | ND | 0 |
| Village District of Eidelweiss NH1461010 | Madison | ND | ND | 0 |
| Wolfeboro Water and Sewer NH2561010 | Wolfeboro | ND | ND | 0 |
| Yankee Book Peddler NH1196050 | Hopkinton | ND | ND | 0 |
ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.