Water quality in Mashantucket, Connecticut
Mashantucket 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 |
|---|---|---|---|---|
| Ledyard Wpca Ledyard Center Ledyard |
3,294 | 3 | 2.3 mi | |
| Scwa, Ledyard Center Division Ledyard |
652 | 0 | 2.4 mi | |
| Scwa, Barrett Division (bar) Ledyard |
300 | 0 | 3.5 mi | |
| Lincoln Park Elderly Housing Preston |
80 | 1 | 3.5 mi | |
| Aquarion-Arlington Acres Stonington |
392 | 0 | 4.0 mi | |
| Ash Water Company, LLC Ledyard |
108 | 0 | 4.1 mi | |
| Scwa, North Stonington Division (nst) North Stonington |
1,860 | 1 | 4.5 mi | |
| Scwa, Chriswood Division (cwd) Ledyard |
164 | 0 | 4.8 mi | |
| Ledyard Wpca, Gales Ferry System Groton, Ledyard |
2,369 | 1 | 5.1 mi | |
| Mystic Village Apartments Groton |
66 | 2 | 5.2 mi | |
| Northstone Gardens North Stonington |
79 | 3 | 5.3 mi | |
| Scwa, Tower-Ferry View Division Ledyard |
2,567 | 1 | 5.4 mi | |
| Scwa, Cedar Ridge Division North Stonington |
370 | 0 | 5.6 mi | |
| Scwa, Mohegan Division Montville |
1,428 | 0 | 6.0 mi | |
| Kitemaug Orchard Association, Inc. Montville |
490 | 0 | 6.4 mi | |
| Mountview Apartments Montville |
105 | 3 | 6.4 mi | |
| Scwa, Birchwood Division (bwd) Montville |
108 | 0 | 6.4 mi | |
| Marina Cove Montville |
70 | 1 | 6.6 mi | |
| Ctwc Bay Mountain Griswold |
440 | 0 | 6.6 mi | |
| Montville Water Supply Montville, Waterford |
1,300 | 0 | 6.9 mi | |
| Tunnel Hill Mobile Home Park Lisbon |
40 | 1 | 7.2 mi | |
| Aquarion-Mystic Groton, Ledyard, Stonington |
10,788 | 0 | 7.3 mi | |
| Neighbors of Rogers, LLC Groton |
57 | 4 | 7.5 mi | |
| Lisbon Mobile Homes Lisbon |
155 | 0 | 7.6 mi | |
| Meadows Apartments Montville |
301 | 0 | 7.7 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 Mashantucket 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.