Water quality for ZIP code 03303
ZIP 03303 covers Concord in Merrimack County, New Hampshire, one of 28 ZIP codes in the county. 246 active public water systems serve the county; 80 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 Merrimack County
62 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Pillsbury Lake/peninsula Webster |
90 | 0 | 1.8 mi | |
| Pillsbury Lake/franklin Pierce Webster |
75 | 2 | 2.2 mi | |
| Deer Meadows Hopkinton |
150 | 2 | 3.8 mi | |
| Canterbury Spruces Housing Canterbury |
25 | 0 | 5.7 mi | |
| The Meadows Hopkinton |
200 | 0 | 5.7 mi | |
| Pleasant Pond Coop and Cmpgrnd Warner |
218 | 0 | 6.4 mi | |
| Contoocook Village Pct Hopkinton |
1,600 | 3 | 6.8 mi | |
| Warner Village Water Dist Warner |
660 | 0 | 8.0 mi | |
| Hopkinton Village Pct Hopkinton |
215 | 1 | 8.3 mi | |
| Cross Mill Village Northfield |
28 | 0 | 8.3 mi | |
| Highlands Village District Northfield |
95 | 0 | 8.7 mi | |
| Concord Water Dept Concord |
44,215 | 0 | 8.8 mi | |
| Elm Brook Village Hopkinton |
90 | 0 | 8.9 mi | |
| Franklin Water Works Franklin |
7,200 | 0 | 9.3 mi | |
| Kos Manufactured Housing Cmnty Loudon |
137 | 1 | 9.4 mi | |
| Presidential Pines/upper Loudon |
60 | 2 | 9.4 mi | |
| Presidential Pines/lower Loudon |
51 | 0 | 9.5 mi | |
| Villages at Loudon Loudon |
250 | 0 | 9.9 mi | |
| Tilton Northfield Water Dist Northfield |
2,500 | 0 | 10.0 mi | |
| Flintlock Apts Loudon |
30 | 1 | 10.1 mi | |
| Voa/nne Senior Housing Loudon |
50 | 0 | 10.3 mi | |
| Freedom Hill/pine Ridge Est Loudon |
370 | 3 | 10.6 mi | |
| Liberty Ridge MHP Henniker |
91 | 0 | 10.8 mi | |
| Evergreen Drive Water Bow |
80 | 0 | 11.1 mi | |
| Soda Brook Northfield |
64 | 2 | 11.1 mi |
Non-community systems in Merrimack County (183: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Merrimack 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.