Water quality for ZIP code 03820
ZIP 03820 covers Dover and Somersworth in Strafford County, New Hampshire, one of 16 ZIP codes in the county. 132 active public water systems serve the county; 45 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Strafford County
47 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Madbury Woods Apartments Madbury |
30 | 4 | 3.0 mi | |
| Johnson Creek Durham |
63 | 0 | 3.6 mi | |
| Rollinsford Water Sewer Dist Rollinsford |
1,688 | 1 | 4.1 mi | |
| Somersworth Water Works Somersworth |
12,200 | 0 | 4.2 mi | |
| Unh/durham Water Sys Durham |
16,000 | 0 | 4.3 mi | |
| Rochester Consecutive Wtr Sys Rochester |
171 | 0 | 5.2 mi | |
| Oyster River Condos Lee |
53 | 1 | 5.6 mi | |
| Country Ridge Mobile Home Park Rochester |
35 | 2 | 5.8 mi | |
| Brookdale Spruce Wood Durham |
225 | 0 | 5.8 mi | |
| Drew Pond Barrington |
100 | 0 | 5.8 mi | |
| Lee Oak Cooperative Barrington |
163 | 0 | 5.9 mi | |
| Profile Apartments Rochester |
90 | 4 | 6.0 mi | |
| Green Hills MHP Barrington |
50 | 0 | 6.0 mi | |
| Packers Falls Village Lee |
60 | 1 | 6.3 mi | |
| Cedar Wood Estates Lee |
30 | 0 | 6.3 mi | |
| Stagecoach Farms Durham |
167 | 0 | 6.7 mi | |
| Halcyon Hill Barrington |
58 | 0 | 7.0 mi | |
| Emerald Acres Barrington |
250 | 0 | 7.2 mi | |
| Greystone Commons Lee |
25 | 0 | 7.2 mi | |
| Oyster River Apts East/west Barrington |
60 | 0 | 7.2 mi | |
| Old Stagecoach Arms Barrington |
35 | 0 | 7.3 mi | |
| Evergreen Terrace Lee |
45 | 2 | 7.3 mi | |
| Ellison Farm Apts Barrington |
48 | 0 | 7.4 mi | |
| Swains Lake Village Water Barrington |
227 | 1 | 7.5 mi | |
| Crossings at Village Ctr Barrington |
60 | 0 | 7.8 mi |
Non-community systems in Strafford County (84: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Strafford 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.