Wisconsin
Sauk County drinking water quality
194 active public water systems serve 67,764 people in Sauk County. 162 are compliant, 32 had at least one EPA violation in the past three years, 0 are designated serious violators, and 2 carry a health flag.
Needs attention
Community water systems
25 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Baraboo Waterworks Baraboo |
12,703 | 0 | 0 | |
|
Reedsburg Waterworks Reedsburg |
9,984 | 0 | 0 | |
|
Prairie DU Sac Waterworks Prairie Du Sac |
4,006 | 2 | 1 | |
|
Sauk City Waterworks Sauk City |
3,518 | 1 | 0 | |
|
Lake Delton Waterworks Lake Delton |
2,914 | 1 | 0 | |
|
Spring Green Waterworks Spring Green |
1,626 | 0 | 0 | |
|
West Baraboo Waterworks West Baraboo |
1,414 | 0 | 0 | |
|
Plain Waterworks Plain |
792 | 2 | 1 | |
|
North Freedom Waterworks North Freedom |
589 | 1 | 1 | |
|
Bluffview Sanitary District Prairie Du Sac |
450 | 2 | 1 | |
|
Merrimac Waterworks Merrimac |
440 | 3 | 2 | |
|
LA Valle Waterworks La Valle |
365 | 1 | 0 | |
|
Loganville Waterworks Loganville |
300 | 0 | 0 | |
|
Spring Green Estates Spring Green |
300 | 0 | 0 | |
|
Rock Springs Waterworks Rock Springs |
292 | 1 | 0 | |
|
Ironton Waterworks La Valle |
253 | 4 | 1 | |
|
Maple Park Condominiums Prairie Du Sac |
150 | 2 | 1 | |
|
Glacier View Subdivision Baraboo |
75 | 3 | 1 | |
|
Lower Dells MHC Lake Delton |
75 | 0 | 0 | |
|
Equinox Rei LLC Dellwood Estates Reedsburg |
70 | 0 | 0 | |
|
Summer Oaks Condo Assoc Merrimac |
70 | 0 | 0 | |
|
Dell Creek Estates Reedsburg |
50 | 3 | 0 | |
|
Spring Green Estates South Spring Green |
40 | 2 | 1 | |
|
Merrimac Estates MHP Merrimac |
37 | 0 | 0 | |
|
Spring Green Estates North Spring Green |
32 | 2 | 0 |
Non-community systems (169: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (388, 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.