Water quality in Jefferson, New Hampshire
Jefferson is in Coos County. 114 active public water systems serve the county; 48 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Coos County
18 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Lancaster Water Dept Lancaster |
2,500 | 0 | 7.1 mi | |
| Carroll Water Works Carroll |
875 | 0 | 9.9 mi | |
| Rosebrook Water Carroll |
1,050 | 1 | 10.3 mi | |
| Lost Nation Water Northumberland |
65 | 0 | 11.5 mi | |
| Gorham Hill Spring Gorham |
55 | 0 | 11.5 mi | |
| Groveton Water Sys Northumberland |
2,650 | 0 | 12.8 mi | |
| Gorham Water and Sewer Dept Gorham |
2,630 | 0 | 13.9 mi | |
| Berlin Water Works Berlin |
9,575 | 0 | 15.4 mi | |
| Deer Estates Milan |
53 | 0 | 18.0 mi | |
| North Stratford MHP Stratford |
50 | 0 | 22.6 mi | |
| Pleasant Valley Park Estates Stratford |
65 | 0 | 22.7 mi | |
| North Stratford Water Dept Stratford |
300 | 0 | 24.3 mi | |
| Errol Water Works/west Errol |
183 | 1 | 30.4 mi | |
| Mountain View Park Estates Columbia |
95 | 1 | 32.5 mi | |
| Colebrook Water Works Colebrook |
1,300 | 2 | 33.8 mi | |
| W Stewartstown Water Pct Stewartstown |
428 | 2 | 40.6 mi | |
| Northern View Apartments Stewartstown |
50 | 0 | 41.0 mi | |
| Pittsburg Water Dept Pittsburg |
233 | 0 | 44.6 mi |
Non-community systems in Coos County (95: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Coos County, nearest to Jefferson first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision files or the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Hampshire records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.