Combined Radium (-226 and -228) violations in Wisconsin
31 active public water systems in Wisconsin had a Combined Radium (-226 and -228) violation in the past three years, 9 of them in the latest quarter of EPA's data. What Combined Radium (-226 and -228) is and why it matters.
Systems with a Combined Radium (-226 and -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 | |
|
Evansville Waterworks Evansville · Rock County |
5,703 | 2 | 0 | |
|
Medford Waterworks Medford · Taylor County |
4,318 | 2 | 0 | |
|
Lomira Waterworks Lomira · Dodge County |
2,701 | 4 | 1 | |
|
Argyle Waterworks Argyle · Lafayette County |
823 | 2 | 0 | |
|
Wheeler Waterworks Assoc Wheeler · Dunn County |
317 | 5 | 2 | |
|
Hidden Meadows Watertown · Dodge County |
166 | 4 | 0 | |
|
Twin Lakes Park Water Coop Twin Lakes · Kenosha County |
150 | 3 | 2 | |
|
Marshview Terrace Waupun · Dodge County |
40 | 3 | 1 | |
|
Waukesha Water Utility Waukesha · Waukesha County |
70,718 | 2 | 1 | |
|
Brookfield Water Utility Brookfield · Waukesha County |
29,070 | 2 | 0 | |
|
Pewaukee Village Waterworks Pewaukee · Waukesha County |
8,166 | 2 | 1 | |
|
Jefferson Waterworks Jefferson · Jefferson County |
7,926 | 3 | 1 | |
|
North Fond DU Lac Waterworks North Fond Du Lac · Fond du Lac County |
5,414 | 3 | 1 | |
|
Bloomfield, Village of Pell Lake · Walworth County |
4,071 | 5 | 1 | |
|
Amery Waterworks Amery · Polk County |
2,962 | 3 | 2 | |
|
Randolph Water Dept Randolph · Columbia County |
1,800 | 2 | 1 | |
|
Augusta Waterworks Augusta · Eau Claire County |
1,450 | 8 | 0 | |
|
Barneveld Waterworks Barneveld · Iowa County |
1,258 | 4 | 1 | |
|
Ridgeway Waterworks Ridgeway · Iowa County |
690 | 3 | 0 | |
|
Eleva Waterworks Eleva · Trempealeau County |
635 | 10 | 0 | |
|
Villa Diann MHP Eau Claire · Eau Claire County |
420 | 3 | 1 | |
|
Readstown Waterworks Readstown · Vernon County |
395 | 3 | 0 | |
|
Leroy Sanitary District 1 Leroy · Dodge County |
320 | 4 | 1 | |
|
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 | |
|
Dells Club Condo Assoc 3 Wisconsin Dells · Adams County |
75 | 4 | 0 | |
|
Cottage Glen Condominiums Ellison Bay · Door County |
52 | 1 | 0 | |
|
Spring Green Estates North Spring Green · Sauk County |
32 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Combined Radium (-226 and -228), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Combined Radium (-226 and -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.