Water quality in Mason, New Hampshire
Mason is in Hillsborough County. 280 active public water systems serve the county; 96 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Hillsborough County
73 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Frost Trailer Park Greenville |
73 | 0 | 2.3 mi | |
| Greenville Water Dept Greenville |
1,100 | 2 | 3.2 mi | |
| Badger Hill Milford |
455 | 0 | 4.2 mi | |
| Freedom Pond New Ipswich |
104 | 1 | 5.0 mi | |
| Appleton Gardens New Ipswich |
57 | 0 | 5.8 mi | |
| Wilton Water Works Wilton |
1,790 | 2 | 5.8 mi | |
| Heritage Way Milford |
48 | 0 | 6.4 mi | |
| Fairhaven Mobile Home Park Milford |
63 | 3 | 6.5 mi | |
| Ashley Commons Milford |
75 | 0 | 6.5 mi | |
| Milford Water Utilities Dept Milford |
9,500 | 1 | 7.0 mi | |
| Silver Lake Estates Hollis |
100 | 0 | 8.3 mi | |
| Hollis Village Marketplace Hollis |
36 | 3 | 8.3 mi | |
| Rolling Acres MHP Mont Vernon |
100 | 0 | 8.7 mi | |
| Connor Court Amherst |
51 | 0 | 8.8 mi | |
| Wilder Village Cluster New Ipswich |
45 | 0 | 8.9 mi | |
| Ridgewood Estates Amherst |
115 | 1 | 10.5 mi | |
| Hollis Pines Coop MHP West Hollis |
220 | 0 | 10.5 mi | |
| Runnells Landing Hollis |
74 | 0 | 10.7 mi | |
| Farley RD Estates Nashua |
85 | 0 | 10.7 mi | |
| Souhegan Woods Amherst |
298 | 0 | 10.9 mi | |
| Gowing Woods Amherst |
53 | 0 | 11.5 mi | |
| Pennichuck Water Works Nashua |
88,853 | 0 | 12.7 mi | |
| Peterborough Water Works Peterborough |
4,500 | 1 | 13.4 mi | |
| Merrimack Village Dist Merrimack |
25,500 | 0 | 13.9 mi | |
| Greenfield Commons Greenfield |
48 | 2 | 15.0 mi |
Non-community systems in Hillsborough County (206: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Hillsborough County, nearest to Mason 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. Retrieved from ECHO on Oct 11, 2026.