Nitrate violations in Wisconsin
226 active public water systems in Wisconsin had a Nitrate violation in the past three years, 9 of them in the latest quarter of EPA's data. What Nitrate is and why it matters.
Health effects: Methemoglobinemia in infants under 6 months: gut bacteria convert nitrate to nitrite, which blocks oxygen transport in blood. Pregnant women should also take precautions. Chronic adult exposure at elevated levels may increase cancer risk.
Systems with a Nitrate violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Pine Acres Resort INC Stephenson Tn · Marinette County |
50 | 2 | 0 | |
|
Pulcifer Pub Pulcifer · Shawano County |
50 | 3 | 1 | |
|
Reillys Pub Markesan · Green Lake County |
50 | 3 | 1 | |
|
Rocky Shores Condominiums Egg Harbor · Door County |
50 | 3 | 1 | |
|
Stevenson Pier Mini Mart Brussels · Door County |
50 | 3 | 1 | |
|
U S F S Two Lakes Cmpgd 6 Drummond · Bayfield County |
50 | 1 | 0 | |
|
WI Dnr Harrington Beach Pucketts Pond Area Belgium · Ozaukee County |
50 | 1 | 0 | |
|
WI Dnr Harrington Beach S Pic Belgium · Ozaukee County |
50 | 1 | 0 | |
|
Wishing Well Bar & Grill Black Creek · Outagamie County |
50 | 3 | 1 | |
|
Bit O Green LLC MHP Arena · Iowa County |
49 | 5 | 1 | |
|
Colonial Gardens Homes Fond Du Lac · Fond du Lac County |
48 | 5 | 0 | |
|
Hyde Store Ridgeway · Iowa County |
48 | 3 | 1 | |
|
Gospel Mennonite School Almena · Barron County |
45 | 4 | 2 | |
|
ST Stanislaus Church Lublin · Taylor County |
45 | 2 | 0 | |
|
Browns Lake Condos Well 3 Burlington · Racine County |
44 | 3 | 1 | |
|
Baywoods Condominiums Sturgeon Bay · Door County |
40 | 3 | 1 | |
|
Browns Lake Condos Well 2 Bldgs C & I Burlington · Racine County |
40 | 3 | 1 | |
|
Cent Wis Env Center Sunset Lodge Amherst Junction · Portage County |
40 | 2 | 0 | |
|
Nelsons Rustic Resort Clintonville · Shawano County |
40 | 3 | 0 | |
|
Prototek Digital Manufacturing (madison) LLC Blue Mounds · Dane County |
40 | 5 | 1 | |
|
Sams Well Drilling Randolph · Dodge County |
40 | 1 | 0 | |
|
WI Dnr Copper Falls Picnic Area and Campground N Mellen · Ashland County |
40 | 2 | 1 | |
|
Blackwell Community County |
39 | 1 | 0 | |
|
Mezzanine Egg Harbor · Door County |
39 | 3 | 1 | |
|
Augusta Mennonite Church & School Augusta · Eau Claire County |
38 | 2 | 0 | |
|
Djs Kwik Stop Gotham · Richland County |
36 | 3 | 1 | |
|
Boondocks Locker Room Galesville · Trempealeau County |
35 | 1 | 0 | |
|
Jims Halfway Bar Neshkoro · Marquette County |
35 | 2 | 0 | |
|
MT Zion Pub Boscobel · Crawford County |
35 | 2 | 0 | |
|
Townsend Shores Mobile Home Park Townsend Tn · Oconto County |
35 | 2 | 0 | |
|
Maxwelton Braes Resort Baileys Harbor · Door County |
33 | 3 | 1 | |
|
Greens N Grains Egg Harbor · Door County |
31 | 3 | 1 | |
|
Karlys Bar Washington Island · Door County |
31 | 3 | 1 | |
|
Newport Resort Egg Harbor · Door County |
31 | 3 | 0 | |
|
Roadhouse Bar of Carlsville Sturgeon Bay · Door County |
31 | 3 | 0 | |
|
Bobs Country Bar Niagara Tn · Marinette County |
30 | 3 | 1 | |
|
Compassionate Heights of Beechwood Kewaskum · Sheboygan County |
30 | 3 | 0 | |
|
Dancing Yarrow Farm to Fork Retreat Mondovi · Buffalo County |
30 | 2 | 0 | |
|
Delavan Gardens Estates Association INC Delavan · Walworth County |
30 | 3 | 1 | |
|
Elmore Heights Trailer Court Campbellsport · Fond du Lac County |
30 | 3 | 0 | |
|
Golden Sands Mini Mart Peshtigo Tn · Marinette County |
30 | 3 | 1 | |
|
Lookout the Arcadia · Buffalo County |
30 | 1 | 0 | |
|
Whispering Pines Apts Salem · Kenosha County |
30 | 5 | 1 | |
|
Baileys 57 Baileys Harbor · Door County |
29 | 3 | 1 | |
|
Club Cottages at Horseshoe Bay Egg Harbor · Door County |
29 | 3 | 0 | |
|
Kettle Black Fish Boil Fish Creek · Door County |
29 | 3 | 1 | |
|
Bleys Bar Egg Harbor · Door County |
28 | 4 | 1 | |
|
Bronco Billys Baraboo · Sauk County |
28 | 1 | 0 | |
|
Holy Nativity Episcopal CH Jacksonport · Door County |
28 | 3 | 0 | |
|
Pickets Sullivan · Jefferson County |
27 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate 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.