Radium-228 violations in Wisconsin
22 active public water systems in Wisconsin had a Radium-228 violation in the past three years, 7 of them in the latest quarter of EPA's data. What Radium-228 is and why it matters.
Systems with a Radium-228 violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Verona Waterworks Verona · Dane County |
14,030 | 3 | 1 | |
|
Pewaukee Village Waterworks Pewaukee · Waukesha County |
8,166 | 2 | 1 | |
|
Evansville Waterworks Evansville · Rock County |
5,703 | 2 | 0 | |
|
Medford Waterworks Medford · Taylor County |
4,318 | 2 | 0 | |
|
Southern Wisconsin Center Union Grove · Racine County |
950 | 4 | 0 | |
|
Argyle Waterworks Argyle · Lafayette County |
823 | 2 | 0 | |
|
Wheeler Waterworks Assoc Wheeler · Dunn County |
317 | 5 | 2 | |
|
Brookfield Water Utility Brookfield · Waukesha County |
29,070 | 2 | 0 | |
|
North Fond DU Lac Waterworks North Fond Du Lac · Fond du Lac County |
5,414 | 3 | 1 | |
|
Amery Waterworks Amery · Polk County |
2,962 | 3 | 2 | |
|
Augusta Waterworks Augusta · Eau Claire County |
1,450 | 8 | 0 | |
|
Barneveld Waterworks Barneveld · Iowa County |
1,258 | 4 | 1 | |
|
Eleva Waterworks Eleva · Trempealeau County |
635 | 10 | 0 | |
|
Gresham Waterworks Gresham · Shawano County |
534 | 3 | 0 | |
|
Readstown Waterworks Readstown · Vernon County |
395 | 3 | 0 | |
|
Radisson Waterworks Radisson · Sawyer County |
241 | 7 | 1 | |
|
Country Road Estates Galesville · Trempealeau County |
120 | 2 | 0 | |
|
Ludwell Estates Elkhorn · Walworth County |
100 | 6 | 1 | |
|
Wiota Sanitary District South Wayne · Lafayette County |
98 | 2 | 0 | |
|
Marshview Terrace Waupun · Dodge County |
40 | 3 | 1 | |
|
Spring Green Estates North Spring Green · Sauk County |
32 | 2 | 0 | |
|
Keyes Lake Mobile Home Park Florence · Florence County |
30 | 5 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved Radium-228, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Radium-228 alone.
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.