Water quality in Groton, Connecticut
Groton 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
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in New London County
87 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Neighbors of Rogers, LLC Groton |
57 | 4 | 0.6 mi | |
| Mystic Village Apartments Groton |
66 | 2 | 2.2 mi | |
| Noank Fire District Groton |
1,947 | 2 | 2.6 mi | |
| Scwa, Chriswood Division (cwd) Ledyard |
164 | 0 | 2.7 mi | |
| Aquarion-Mystic Groton, Ledyard, Stonington |
10,788 | 0 | 3.1 mi | |
| Ctwc Shoreline Region-Masons Island Stonington |
445 | 0 | 3.4 mi | |
| Groton Long Point Association Groton |
2,400 | 2 | 3.5 mi | |
| Scwa, Barrett Division (bar) Ledyard |
300 | 0 | 4.3 mi | |
| Ash Water Company, LLC Ledyard |
108 | 0 | 4.7 mi | |
| Scwa, Tower-Ferry View Division Ledyard |
2,567 | 1 | 4.8 mi | |
| New London Dept. of Public Utilities New London, Waterford |
27,620 | 1 | 4.8 mi | |
| Ledyard Wpca Ledyard Center Ledyard |
3,294 | 3 | 5.0 mi | |
| Scwa, Ledyard Center Division Ledyard |
652 | 0 | 5.4 mi | |
| Aquarion-Arlington Acres Stonington |
392 | 0 | 5.5 mi | |
| Ledyard Wpca, Gales Ferry System Groton, Ledyard |
2,369 | 1 | 6.1 mi | |
| Waterford Wpca Montville, New London, Waterford |
16,578 | 2 | 6.6 mi | |
| Marina Cove Montville |
70 | 1 | 7.0 mi | |
| Kitemaug Orchard Association, Inc. Montville |
490 | 0 | 7.2 mi | |
| Northstone Gardens North Stonington |
79 | 3 | 7.6 mi | |
| Independence Village Elderly Housing Montville |
55 | 1 | 7.8 mi | |
| Waterford Country School, Inc. Waterford |
180 | 0 | 7.8 mi | |
| Scwa, Cedar Ridge Division North Stonington |
370 | 0 | 7.9 mi | |
| Scwa, Hillcrest Division (hlc) Montville |
450 | 0 | 8.0 mi | |
| Montville Water Supply Montville, Waterford |
1,300 | 0 | 8.0 mi | |
| Scwa, North Stonington Division (nst) North Stonington |
1,860 | 1 | 8.2 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 Groton 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. Retrieved from ECHO on Oct 11, 2026.