Water quality for ZIP code 06378
ZIP 06378 covers Mystic and Stonington in New London County, Connecticut, one of 33 ZIP codes in the 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 |
|---|---|---|---|---|
| Aquarion-Arlington Acres Stonington |
392 | 0 | 2.6 mi | |
| Northstone Gardens North Stonington |
79 | 3 | 2.8 mi | |
| Scwa, Cedar Ridge Division North Stonington |
370 | 0 | 2.9 mi | |
| Scwa, North Stonington Division (nst) North Stonington |
1,860 | 1 | 4.1 mi | |
| Mystic Village Apartments Groton |
66 | 2 | 4.3 mi | |
| Ctwc Shoreline Region-Masons Island Stonington |
445 | 0 | 4.8 mi | |
| Ledyard Wpca Ledyard Center Ledyard |
3,294 | 3 | 4.9 mi | |
| Neighbors of Rogers, LLC Groton |
57 | 4 | 5.3 mi | |
| Noank Fire District Groton |
1,947 | 2 | 5.9 mi | |
| Scwa, Chriswood Division (cwd) Ledyard |
164 | 0 | 5.9 mi | |
| Scwa, Barrett Division (bar) Ledyard |
300 | 0 | 6.4 mi | |
| Scwa, Ledyard Center Division Ledyard |
652 | 0 | 6.7 mi | |
| Groton Long Point Association Groton |
2,400 | 2 | 7.1 mi | |
| Groton Utilities Groton, Ledyard |
30,200 | 1 | 7.4 mi | |
| Ash Water Company, LLC Ledyard |
108 | 0 | 7.6 mi | |
| Preston Plains Water Company Preston |
550 | 2 | 8.5 mi | |
| Scwa, Tower-Ferry View Division Ledyard |
2,567 | 1 | 8.5 mi | |
| Ledyard Wpca, Gales Ferry System Groton, Ledyard |
2,369 | 1 | 9.3 mi | |
| Lincoln Park Elderly Housing Preston |
80 | 1 | 9.9 mi | |
| New London Dept. of Public Utilities New London, Waterford |
27,620 | 1 | 10.5 mi | |
| Marina Cove Montville |
70 | 1 | 10.7 mi | |
| Kitemaug Orchard Association, Inc. Montville |
490 | 0 | 10.8 mi | |
| Ctwc Bay Mountain Griswold |
440 | 0 | 11.1 mi | |
| Scwa, Mohegan Division Montville |
1,428 | 0 | 11.3 mi | |
| Mountview Apartments Montville |
105 | 3 | 11.4 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, 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 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.