Public Notification Rule violations in Wisconsin
719 active public water systems in Wisconsin had a Public Notification Rule violation in the past three years, 719 of them in the latest quarter of EPA's data. What Public Notification Rule is and why it matters.
Health effects: No direct health risk from the notification violation itself, but delayed notification means customers may have consumed contaminated water without the chance to take protective action (boil water orders, bottled water use).
Systems with a Public Notification Rule violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Racine Waterworks Racine · Racine County |
105,100 | 1 | 1 | |
|
Waukesha Water Utility Waukesha · Waukesha County |
70,718 | 2 | 1 | |
|
Oak Creek Waterworks Oak Creek · Milwaukee County |
32,104 | 2 | 1 | |
|
Superior Water Light & Power Company Superior · Douglas County |
26,084 | 2 | 1 | |
|
Middleton Waterworks Middleton · Dane County |
23,868 | 3 | 1 | |
|
Franklin Water Utility Franklin · Milwaukee County |
22,500 | 1 | 1 | |
|
Caledonia Water Utility Village of Caledonia · Racine County |
21,819 | 3 | 1 | |
|
Germantown Water Utility Germantown · Washington County |
20,027 | 2 | 1 | |
|
Hudson Waterworks Hudson · St. Croix County |
18,558 | 3 | 1 | |
|
River Falls Waterworks River Falls · Pierce County |
16,000 | 2 | 1 | |
|
Menasha Elec & Water Util Menasha · Winnebago County |
15,144 | 1 | 1 | |
|
Verona Waterworks Verona · Dane County |
14,030 | 3 | 1 | |
|
Glendale Waterworks Glendale · Milwaukee County |
12,883 | 3 | 2 | |
|
Sussex Village Hall & Water Utility Sussex · Waukesha County |
11,750 | 2 | 1 | |
|
Pleasant Prairie Water Utility Pleasant Prairie · Kenosha County |
10,754 | 2 | 1 | |
|
Deforest Waterworks Deforest · Dane County |
10,500 | 2 | 1 | |
|
Holmen Waterworks Holmen · La Crosse County |
10,147 | 2 | 1 | |
|
Altoona Waterworks Altoona · Eau Claire County |
9,627 | 2 | 1 | |
|
Cottage Grove Waterworks Cottage Grove · Dane County |
9,345 | 2 | 1 | |
|
Sheboygan Falls Utilities Sheboygan Falls · Sheboygan County |
8,687 | 1 | 1 | |
|
Pewaukee City Water and Sewer Utility Pewaukee · Waukesha County |
8,671 | 2 | 1 | |
|
Rhinelander Water & Wastewater Rhinelander · Oneida County |
8,234 | 2 | 1 | |
|
Mukwonago Waterworks Mukwonago · Waukesha County |
8,190 | 1 | 1 | |
|
Pewaukee Village Waterworks Pewaukee · Waukesha County |
8,166 | 2 | 1 | |
|
Muskego Water Utility Muskego · Waukesha County |
8,150 | 3 | 1 | |
|
Jefferson Waterworks Jefferson · Jefferson County |
7,926 | 3 | 1 | |
|
Antigo Waterworks Antigo · Langlade County |
7,780 | 3 | 2 | |
|
MT Horeb Waterworks Mount Horeb · Dane County |
7,756 | 1 | 1 | |
|
Ripon Water Utility Ripon · Fond du Lac County |
7,716 | 2 | 1 | |
|
Kronenwetter Water & Sewer Utility Kronenwetter · Marathon County |
6,931 | 3 | 1 | |
|
Lake Hallie Waterworks Village of Chippewa Falls · Chippewa County |
6,701 | 4 | 2 | |
|
Lake Mills Waterworks Lake Mills · Jefferson County |
6,211 | 2 | 2 | |
|
Slinger Water Utility Slinger · Washington County |
5,659 | 2 | 1 | |
|
Edgerton Waterworks Edgerton · Rock County |
5,512 | 2 | 1 | |
|
North Fond DU Lac Waterworks North Fond Du Lac · Fond du Lac County |
5,414 | 3 | 1 | |
|
Waterford Waterworks Waterford · Racine County |
5,368 | 3 | 1 | |
|
Columbus Utilities Columbus · Columbia County |
5,173 | 2 | 1 | |
|
Richland Center Waterworks Richland Center · Richland County |
5,100 | 2 | 1 | |
|
Shawano LK San Dist 1 Shawano · Shawano County |
4,950 | 1 | 1 | |
|
Union Grove Waterworks Union Grove · Racine County |
4,900 | 2 | 1 | |
|
Mauston Waterworks Mauston · Juneau County |
4,456 | 2 | 1 | |
|
Bloomfield, Village of Pell Lake · Walworth County |
4,071 | 5 | 1 | |
|
Prairie DU Sac Waterworks Prairie Du Sac · Sauk County |
4,006 | 2 | 1 | |
|
Bloomer Waterworks Bloomer · Chippewa County |
3,680 | 2 | 1 | |
|
Combined Locks Waterworks Combined Locks · Outagamie County |
3,609 | 3 | 1 | |
|
Black River Falls Waterworks Black River Falls · Jackson County |
3,608 | 3 | 1 | |
|
Mosinee Waterworks Mosinee · Marathon County |
3,406 | 1 | 1 | |
|
Somerset Waterworks Somerset · St. Croix County |
3,334 | 3 | 1 | |
|
Johnson Creek Waterworks Johnson Creek · Jefferson County |
3,318 | 4 | 1 | |
|
Ellsworth Waterworks Ellsworth · Pierce County |
3,304 | 2 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Public Notification Rule, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Public Notification Rule 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.