Wisconsin
Iowa County drinking water quality
77 active public water systems serve 25,880 people in Iowa County. 49 are compliant, 28 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 0 carry a health flag.
Needs attention
Community water systems
15 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Dodgeville Waterworks Dodgeville |
4,583 | 0 | 0 | |
|
Mineral Point Waterworks Mineral Point |
2,487 | 3 | 2 | |
|
Barneveld Waterworks Barneveld |
1,258 | 4 | 1 | |
|
Arena Waterworks Arena |
877 | 0 | 0 | |
|
Highland Waterworks Highland |
842 | 0 | 0 | |
|
Ridgeway Waterworks Ridgeway |
690 | 3 | 0 | |
|
Linden Waterworks Linden |
547 | 1 | 1 | |
|
Avoca Waterworks Avoca |
545 | 4 | 1 | |
|
House on the Rock Resort Spring Green |
470 | 1 | 0 | |
|
Cobb Waterworks Cobb |
458 | 2 | 1 | |
|
Rewey Waterworks Rewey |
290 | 1 | 1 | |
|
Hollandale Waterworks Hollandale |
283 | 1 | 1 | |
|
Edmund TN of Linden San Dist 1 Edmund |
110 | 0 | 0 | |
|
Bit O Green LLC MHP Arena |
49 | 5 | 1 | |
|
Zweifels Country View Dodgeville |
40 | 0 | 0 |
Non-community systems (62: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (74, 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.