Water quality in North Stonington, Connecticut
North Stonington is in New London County. 392 active public water systems serve the county; 204 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in New London County
87 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Scwa, Cedar Ridge Division North Stonington |
370 | 0 | 2.1 mi | |
| Northstone Gardens North Stonington |
79 | 3 | 2.2 mi | |
| Aquarion-Arlington Acres Stonington |
392 | 0 | 3.9 mi | |
| Ledyard Wpca Ledyard Center Ledyard |
3,294 | 3 | 5.5 mi | |
| Preston Plains Water Company Preston |
550 | 2 | 6.4 mi | |
| Ctwc Bay Mountain Griswold |
440 | 0 | 6.6 mi | |
| Scwa, Ledyard Center Division Ledyard |
652 | 0 | 7.2 mi | |
| Mystic Village Apartments Groton |
66 | 2 | 7.4 mi | |
| Aquarion-Mystic Groton, Ledyard, Stonington |
10,788 | 0 | 7.5 mi | |
| Scwa, Barrett Division (bar) Ledyard |
300 | 0 | 7.7 mi | |
| Griswold MHP LLC Griswold |
99 | 3 | 8.1 mi | |
| Scwa, Chriswood Division (cwd) Ledyard |
164 | 0 | 8.2 mi | |
| Voluntown Housing Authority Voluntown |
42 | 2 | 8.6 mi | |
| Lincoln Park Elderly Housing Preston |
80 | 1 | 8.7 mi | |
| Ash Water Company, LLC Ledyard |
108 | 0 | 8.8 mi | |
| Ctwc Country Mobile Div. Griswold |
186 | 0 | 8.9 mi | |
| Neighbors of Rogers, LLC Groton |
57 | 4 | 9.4 mi | |
| Ctwc Sdc Water Voluntown |
216 | 0 | 9.5 mi | |
| Ctwc Shoreline Region-Masons Island Stonington |
445 | 0 | 9.7 mi | |
| Scwa, Tower-Ferry View Division Ledyard |
2,567 | 1 | 10.1 mi | |
| Ledyard Wpca, Gales Ferry System Groton, Ledyard |
2,369 | 1 | 10.2 mi | |
| Jewett City Water Co., S & W System Griswold |
320 | 0 | 10.3 mi | |
| Noank Fire District Groton |
1,947 | 2 | 10.5 mi | |
| Tunnel Hill Mobile Home Park Lisbon |
40 | 1 | 10.9 mi | |
| Groton Utilities Groton, Ledyard |
30,200 | 1 | 11.2 mi |
Non-community systems in New London County (304: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to New London County, nearest to North Stonington 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 Connecticut 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.