Water quality in Union, Maine
Union is in Knox County. 46 active public water systems serve the county; 22 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Knox County
15 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Crawford Commons Union |
50 | 2 | 1.0 mi | |
| Mountainside Mobile Home Park Camden |
130 | 0 | 9.3 mi | |
| Village at Rockport #4 Rockport |
43 | 0 | 9.5 mi | |
| Village at Rockport #1 Rockport |
30 | 1 | 9.5 mi | |
| Village at Rockport #2 Rockport |
30 | 0 | 9.5 mi | |
| Village at Rockport #3 Rockport |
25 | 0 | 9.5 mi | |
| Maine Water Company Warren Division Warren |
815 | 0 | 9.6 mi | |
| Maine Water Company Camden & Rockland Camden, Owls Head, Rockland and 3 more |
21,315 | 0 | 9.9 mi | |
| Four Winds Homeowners Assn South Thomaston |
43 | 0 | 10.8 mi | |
| Elliott Apartments Owls Head |
55 | 4 | 14.5 mi | |
| Friendship Water Department Friendship |
85 | 0 | 16.7 mi | |
| Tenants Harbor Water District St George |
378 | 0 | 18.0 mi | |
| Port Clyde Water District St George |
330 | 1 | 20.4 mi | |
| North Haven Water Department North Haven |
740 | 0 | 20.6 mi | |
| Vinalhaven Water District Vinalhaven |
1,053 | 3 | 24.5 mi |
Non-community systems in Knox County (30: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Knox County, nearest to Union 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.
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 Maine 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.