Maine
Knox County drinking water quality
46 active public water systems serve 30,632 people in Knox County. 24 are compliant, 22 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
16 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Maine Water Company Camden & Rockland Camden, Owls Head, Rockland and 3 more |
21,315 | 0 | 0 | |
|
Vinalhaven Water District Vinalhaven |
1,053 | 3 | 1 | |
|
Maine Water Company Warren Division Warren |
815 | 0 | 0 | |
|
North Haven Water Department North Haven |
740 | 0 | 0 | |
|
Tenants Harbor Water District St George |
378 | 0 | 0 | |
|
Port Clyde Water District St George |
330 | 1 | 0 | |
|
Maine Water Company Union Division Union |
238 | 0 | 0 | |
|
Mountainside Mobile Home Park Camden |
130 | 0 | 0 | |
|
Friendship Water Department Friendship |
85 | 0 | 0 | |
|
Elliott Apartments Owls Head |
55 | 4 | 2 | |
|
Crawford Commons Union |
50 | 2 | 0 | |
|
Four Winds Homeowners Assn South Thomaston |
43 | 0 | 0 | |
|
Village at Rockport #4 Rockport |
43 | 0 | 0 | |
|
Village at Rockport #1 Rockport |
30 | 1 | 0 | |
|
Village at Rockport #2 Rockport |
30 | 0 | 0 | |
|
Village at Rockport #3 Rockport |
25 | 0 | 0 |
Non-community systems (30: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (151, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.