Revised Total Coliform Rule (RTCR) violations in Wisconsin
888 active public water systems in Wisconsin had a Revised Total Coliform Rule (RTCR) violation in the past three years, 97 of them in the latest quarter of EPA's data. What Revised Total Coliform Rule (RTCR) is and why it matters.
Systems with a Revised Total Coliform Rule (RTCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
WI Dnr Merrick Entrance Station Fountain City · Buffalo County |
75 | 1 | 0 | |
|
Regency Club Condominiums Kansasville · Racine County |
74 | 1 | 0 | |
|
Holy Rosary School Durand · Pepin County |
70 | 2 | 0 | |
|
Horseshoe Bay Golf Public Egg Harbor · Door County |
70 | 2 | 1 | |
|
Indue Sales and Services Hudson · St. Croix County |
70 | 2 | 0 | |
|
Mogasheen Resort Cable · Bayfield County |
70 | 1 | 0 | |
|
Northport Ferry Terminal Northport · Door County |
70 | 2 | 1 | |
|
Williamsburg 207 209 and 214 Thiensville · Ozaukee County |
70 | 4 | 3 | |
|
Bayside Tavern Fish Creek · Door County |
68 | 2 | 1 | |
|
U S F W S Horicon Hdqrts Bldg Mayville · Dodge County |
68 | 1 | 0 | |
|
Lakeview Heights Mobile Home Park Algoma · Kewaunee County |
66 | 1 | 0 | |
|
Allstate Peterbilt Group Eau Claire · Eau Claire County |
65 | 1 | 0 | |
|
Center House Ripon · Green Lake County |
65 | 3 | 0 | |
|
Goetschs Welding & Machine INC Merrill · Marathon County |
65 | 1 | 0 | |
|
High Point Inn Ephraim · Door County |
65 | 2 | 1 | |
|
Holy Assumption Church Lublin · Taylor County |
65 | 2 | 0 | |
|
Ritchie Implement Lancaster · Grant County |
65 | 3 | 1 | |
|
Settlement Courtyard Inn Fish Creek · Door County |
65 | 1 | 0 | |
|
Subway Sandwiches Pioneer Mall Westfield · Marquette County |
65 | 2 | 1 | |
|
Acton Academy Main Oshkosh · Winnebago County |
64 | 1 | 0 | |
|
Grande Custom Ingredients Juda · Green County |
64 | 8 | 2 | |
|
Seaquist Orchards Farm Market LLC Sister Bay · Door County |
62 | 2 | 1 | |
|
Baer Manufacturing Hudson · St. Croix County |
60 | 2 | 0 | |
|
Carebare Daycare Osceola · Polk County |
60 | 3 | 0 | |
|
Carlton Heights MHP CT 2 Sturgeon Bay · Door County |
60 | 2 | 1 | |
|
Inn at Little Sister Hill Sister Bay · Door County |
60 | 2 | 1 | |
|
Mequon Parc Apartments LLC Mequon · Ozaukee County |
60 | 1 | 0 | |
|
Silver Oak Apts Silver Lake · Kenosha County |
60 | 3 | 1 | |
|
Traders Island Campground Arena · Iowa County |
60 | 1 | 0 | |
|
Washington Island Recreation Ctr Washington Island · Door County |
58 | 3 | 1 | |
|
K K Fiske Restaurant Wash Island · Door County |
57 | 2 | 1 | |
|
WI Dnr Pike Lake Hdqtrs Hartford · Washington County |
57 | 1 | 0 | |
|
Birch Creek Egg Harbor · Door County |
56 | 2 | 1 | |
|
Coyote Roadhouse Bar Baileys Harbor · Door County |
56 | 2 | 1 | |
|
Greenwood Supper Club INC Fish Creek · Door County |
56 | 2 | 1 | |
|
Honkers Muscoda · Richland County |
56 | 3 | 1 | |
|
UP the Street Glen Haven · Grant County |
56 | 3 | 1 | |
|
Log Den Egg Harbor · Door County |
55 | 2 | 1 | |
|
Mink River Basin Ellison Bay · Door County |
55 | 2 | 0 | |
|
WI Dnr Kmsf Lapham Peak Hausman Nature Center Delafield · Waukesha County |
55 | 1 | 0 | |
|
Jump River Bears Den Sheldon · Taylor County |
54 | 2 | 1 | |
|
Lake Fire Winery Baileys Harbor · Door County |
54 | 2 | 1 | |
|
Mug ZS Pub and Grill Muskego · Waukesha County |
54 | 1 | 0 | |
|
Red Cup Coffee House Washington Island · Door County |
54 | 2 | 1 | |
|
Village Green Lodge Ephraim · Door County |
54 | 2 | 1 | |
|
WI Dnr Whitefish Dunes Ofc Sturgeon Bay · Door County |
54 | 2 | 0 | |
|
WI Dnr Whitefish Dunes Pic Sturgeon Bay · Door County |
54 | 1 | 0 | |
|
A C Tap Tavern Baileys Harbor · Door County |
53 | 2 | 1 | |
|
Menominee Cultural Museum County |
53 | 3 | 1 | |
|
Yoders Rockville Bar Potosi · Grant County |
53 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Revised Total Coliform Rule (RTCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Revised Total Coliform Rule (RTCR) 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.