Water quality for ZIP code 03801
ZIP 03801 covers Portsmouth in Rockingham County, New Hampshire, one of 36 ZIP codes in the county. 554 active public water systems serve the county; 154 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 Rockingham County
198 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Portsmouth Water Works Portsmouth |
33,000 | 0 | 0.5 mi | |
| Summerwind Place SR Hsng Greenland |
28 | 0 | 3.6 mi | |
| Pheasant Run Condos Stratham |
70 | 0 | 4.3 mi | |
| Burnhaven Stratham |
150 | 0 | 4.4 mi | |
| New Castle Water Works New Castle |
910 | 1 | 4.4 mi | |
| Balmoral Condos Stratham |
105 | 0 | 4.5 mi | |
| Aberdeen/west Stratham |
46 | 1 | 4.6 mi | |
| Rye Water Dist Rye |
4,300 | 1 | 4.7 mi | |
| Salt River Condos Stratham |
195 | 0 | 5.2 mi | |
| Glengarry Condos Stratham |
171 | 0 | 5.4 mi | |
| Lamington Hill Stratham |
35 | 5 | 5.6 mi | |
| Muirfield Cluster Stratham |
69 | 0 | 6.0 mi | |
| Jewett Hill Stratham |
55 | 0 | 6.0 mi | |
| Chisholm Farm Stratham |
168 | 0 | 6.1 mi | |
| Wade Farm Condos Newmarket |
40 | 0 | 6.2 mi | |
| Stratham Green Condos Stratham |
150 | 0 | 6.4 mi | |
| Montrose Condos Stratham |
210 | 0 | 6.6 mi | |
| Four Seasons Mobile Home Park Hampton |
55 | 0 | 6.9 mi | |
| Newmarket Water Works Newmarket |
5,030 | 0 | 7.0 mi | |
| Peninsula at Winding Brook Stratham |
128 | 0 | 7.2 mi | |
| Stratham Woods Stratham |
38 | 3 | 7.3 mi | |
| Newfields Vlg Water and Sewer Newfields |
550 | 0 | 7.4 mi | |
| Thornhill Condos Stratham |
175 | 1 | 7.5 mi | |
| Stonearch Condo Assn/kirkwall Stratham |
52 | 1 | 7.7 mi | |
| Aquarion Water/nh Hampton |
34,000 | 1 | 8.1 mi |
Non-community systems in Rockingham County (355: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Rockingham 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.