New Hampshire
Hillsborough County drinking water quality
280 active public water systems serve 336,745 people in Hillsborough County. 184 are compliant, 96 had at least one EPA violation in the past three years, 0 are designated serious violators, and 4 carry a health flag.
Needs attention
Community water systems
74 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Manchester Water Works Manchester |
123,500 | 0 | 0 | |
|
Pennichuck Water Works Nashua |
88,853 | 0 | 0 | |
|
Merrimack Village Dist Merrimack |
25,500 | 0 | 0 | |
|
Hudson Water Dept Hudson |
16,700 | 1 | 0 | |
|
Milford Water Utilities Dept Milford |
9,500 | 1 | 0 | |
|
Litchfield Litchfield |
6,920 | 0 | 0 | |
|
Peterborough Water Works Peterborough |
4,500 | 1 | 0 | |
|
Goffstown Village Pct Goffstown |
3,250 | 3 | 0 | |
|
Little Pond Estates Bedford |
3,000 | 0 | 0 | |
|
Hillsborough Water Works Hillsborough |
2,000 | 0 | 0 | |
|
Wilton Water Works Wilton |
1,790 | 2 | 2 | |
|
Emerald Lake Hillsborough |
1,300 | 3 | 2 | |
|
Powder Hill Bedford |
1,148 | 0 | 0 | |
|
Grasmere Water Pct/main Goffstown |
1,125 | 1 | 0 | |
|
Greenville Water Dept Greenville |
1,100 | 2 | 0 | |
|
Cabot Preserve Bedford |
965 | 0 | 0 | |
|
Antrim Dpw/utilities Div Antrim |
920 | 0 | 0 | |
|
Williamsburg Pelham |
910 | 0 | 0 | |
|
Bennington Water Dept Bennington |
775 | 0 | 0 | |
|
Greenville Est Village Dist Greenville |
472 | 3 | 0 | |
|
Badger Hill Milford |
455 | 0 | 0 | |
|
Hancock Water Works Hancock |
450 | 0 | 0 | |
|
Crotched Mountain School Greenfield |
300 | 7 | 1 | |
|
Souhegan Woods Amherst |
298 | 0 | 0 | |
|
Wediko School Windsor |
280 | 3 | 1 | |
|
Contoocook River Cooperative Deering |
245 | 0 | 0 | |
|
Hollis Pines Coop MHP West Hollis |
220 | 0 | 0 | |
|
Hudson Mobile Home Ests Hudson |
220 | 0 | 0 | |
|
South Weare Water Weare |
200 | 3 | 0 | |
|
Collins Landing Weare |
180 | 0 | 0 | |
|
Mountainside at Crotched Mtn Bennington |
180 | 0 | 0 | |
|
Sky View Estates Pelham |
168 | 0 | 0 | |
|
Francestown Village Water Francestown |
130 | 0 | 0 | |
|
Revel Pelham Pelham |
123 | 1 | 0 | |
|
Highland Estates Apartments Pelham |
120 | 0 | 0 | |
|
Crotched Mountain Mntnc Francestown |
115 | 0 | 0 | |
|
Garland Woods Pelham |
115 | 0 | 0 | |
|
MT Laurel Estates Goffstown |
115 | 1 | 0 | |
|
Ridgewood Estates Amherst |
115 | 1 | 0 | |
|
Briar Court Estates Goffstown |
113 | 0 | 0 | |
|
Landmark Estates Condos Pelham |
105 | 0 | 0 | |
|
Orchard Highlands Goffstown |
105 | 0 | 0 | |
|
Freedom Pond New Ipswich |
104 | 1 | 0 | |
|
Long Pond Woods Pelham |
102 | 1 | 0 | |
|
Rolling Acres MHP Mont Vernon |
100 | 0 | 0 | |
|
Silver Lake Estates Hollis |
100 | 0 | 0 | |
|
Stonegate Estates Pelham |
95 | 0 | 0 | |
|
Grasmere Wp/landmark Goffstown |
90 | 1 | 0 | |
|
Farley RD Estates Nashua |
85 | 0 | 0 | |
|
Daniels Lake Weare |
78 | 0 | 0 |
Non-community systems (206: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (277, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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. Retrieved from ECHO on Oct 11, 2026.