Water quality for ZIP code 03809
ZIP 03809 covers Alton in Belknap County, New Hampshire, one of 13 ZIP codes in the county. 256 active public water systems serve the county; 72 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Belknap County
69 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Merrymeeting MHP Alton |
265 | 0 | 1.9 mi | |
| Eagles Rest MHP Alton |
138 | 0 | 2.1 mi | |
| Lakeside at Winnipesaukee Alton |
85 | 0 | 5.7 mi | |
| Locke Lake Barnstead |
2,308 | 0 | 6.0 mi | |
| Lily Pond MHP Gilford |
26 | 1 | 9.6 mi | |
| Country Village Way Gilford |
100 | 0 | 9.9 mi | |
| Cherry Valley Condos Gilford |
90 | 0 | 10.2 mi | |
| Samoset at Winnipesaukee Gilford |
343 | 0 | 10.2 mi | |
| Chalet Village Gilford |
35 | 0 | 10.4 mi | |
| Lake Shore Park Gilford |
150 | 1 | 10.7 mi | |
| Gunstock Acres Village Dist Gilford |
1,440 | 4 | 10.7 mi | |
| Brake Hill Acres Gilford |
98 | 0 | 11.1 mi | |
| Gunstock Glen Water Gilford |
138 | 0 | 11.3 mi | |
| Brookside Crossing Gilford |
138 | 1 | 11.4 mi | |
| Liberty Highlands Water Gilford |
50 | 0 | 11.5 mi | |
| Abenaki Water/gilford Village Gilford |
190 | 0 | 11.7 mi | |
| Gilford Forest Estates Gilford |
113 | 0 | 11.7 mi | |
| Winnstock Condos Gilford |
125 | 0 | 11.8 mi | |
| Belknap Heights Water Gilford |
60 | 0 | 12.0 mi | |
| Broadview Condos Gilford |
128 | 0 | 12.0 mi | |
| Hampshire Village Gilford |
40 | 0 | 12.4 mi | |
| Lrmhv Gilford |
233 | 0 | 12.5 mi | |
| Old Lake Shore Gilford |
128 | 0 | 12.6 mi | |
| Gilford Meadows Gilford |
75 | 0 | 12.7 mi | |
| Edge of Woods Gilford |
123 | 0 | 12.7 mi |
Non-community systems in Belknap County (186: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Belknap County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.