Wisconsin
Marathon County drinking water quality
195 active public water systems serve 103,492 people in Marathon County. 144 are compliant, 51 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
23 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Wausau Waterworks Wausau |
39,994 | 0 | 0 | |
|
Weston Municipal Utilities Weston |
16,000 | 1 | 1 | |
|
Kronenwetter Water & Sewer Utility Kronenwetter |
6,931 | 3 | 1 | |
|
Rib Mountain Water Utility Wausau |
6,398 | 0 | 0 | |
|
Mosinee Waterworks Mosinee |
3,406 | 1 | 1 | |
|
Rothschild Waterworks Rothschild |
3,190 | 2 | 0 | |
|
Abbotsford Waterworks Abbotsford |
2,502 | 3 | 2 | |
|
Schofield Waterworks Schofield |
2,205 | 2 | 1 | |
|
Spencer Waterworks Spencer |
1,848 | 4 | 2 | |
|
Colby Waterworks Colby |
1,829 | 0 | 0 | |
|
Marathon City Waterworks Marathon City |
1,695 | 2 | 1 | |
|
Stratford Waterworks Stratford |
1,643 | 3 | 1 | |
|
Edgar Waterworks Edgar |
1,491 | 2 | 1 | |
|
Mosinee East System Mosinee |
1,046 | 0 | 0 | |
|
Athens Waterworks Athens |
1,025 | 3 | 1 | |
|
Hatley Waterworks Hatley |
550 | 1 | 1 | |
|
Maine Water Utility Wausau |
271 | 2 | 1 | |
|
Maizefield MHC (manufactured Home Community) Mosinee |
145 | 2 | 1 | |
|
Boardwalk MHC LLC Marshfield |
130 | 3 | 1 | |
|
Deer Trail Village Mosinee |
120 | 7 | 0 | |
|
Edgewood Country Estates Mosinee |
49 | 1 | 1 | |
|
West Gate Estates Mobile Hms Marathon |
43 | 2 | 1 | |
|
2yk LLC Antigo |
25 | 5 | 1 |
Non-community systems (172: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (319, 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 Wisconsin 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.