June 17, 2026
Nitrates in Wisconsin Drinking Water 2026
Nitrates in Wisconsin Drinking Water 2026
Nitrates contamination has been detected in drinking water systems across Wisconsin. High nitrate levels cause methemoglobinemia (blue baby syndrome) in infants. EPA MCL is 10 mg/L. Our analysis of Wisconsin water quality reports found Nitrates present in 627 cities and water systems statewide. If you live in one of these communities, a certified home filter can significantly reduce your exposure -- browse Nitrates filters at PureWaterGuys.
Cities in Wisconsin with Nitrates Detected
The following 627 water systems in Wisconsin reported Nitrates in their annual water quality reports. Click any city to read the full report.
| City / Water System | Water Quality Report |
|---|---|
| Abbotsford Wi Water Quality Report 2026 | View Report |
| Adams Wi Water Quality Report 2026 | View Report |
| Adell Wi Water Quality Report 2026 | View Report |
| Afton Wi Water Quality Report 2026 | View Report |
| Albany Wi Water Quality Report 2026 | View Report |
| Algoma Wi Water Quality Report 2026 | View Report |
| Allenton Wi Water Quality Report 2026 | View Report |
| Alma Center Wi Water Quality Report 2026 | View Report |
| Alma Wi Water Quality Report 2026 | View Report |
| Almena Wi Water Quality Report 2026 | View Report |
| Altoona Wi Water Quality Report 2026 | View Report |
| Amery Wi Water Quality Report 2026 | View Report |
| Amherst Wi Water Quality Report 2026 | View Report |
| Aniwa Wi Water Quality Report 2026 | View Report |
| Antigo Wi Water Quality Report 2026 | View Report |
| Antioch Wi Water Quality Report 2026 | View Report |
| Appleton Wi Water Quality Report 2026 | View Report |
| Arbor Vitae Wi Water Quality Report 2026 | View Report |
| Arcadia Wi Water Quality Report 2026 | View Report |
| Arena Wi Water Quality Report 2026 | View Report |
| Argyle Wi Water Quality Report 2026 | View Report |
| Arlington Wi Water Quality Report 2026 | View Report |
| Ashland Wi Water Quality Report 2026 | View Report |
| Ashwaubenon Wi Water Quality Report 2026 | View Report |
| Athens Wi Water Quality Report 2026 | View Report |
| Atlanta Wi Water Quality Report 2026 | View Report |
| Augusta Wi Water Quality Report 2026 | View Report |
| Avoca Wi Water Quality Report 2026 | View Report |
| Bagley Wi Water Quality Report 2026 | View Report |
| Baldwin Wi Water Quality Report 2026 | View Report |
| Balsam Lake Wi Water Quality Report 2026 | View Report |
| Bangor Wi Water Quality Report 2026 | View Report |
| Baraboo Wi Water Quality Report 2026 | View Report |
| Barneveld Wi Water Quality Report 2026 | View Report |
| Barrington Wi Water Quality Report 2026 | View Report |
| Barron Wi Water Quality Report 2026 | View Report |
| Bassett Wi Water Quality Report 2026 | View Report |
| Bay City Wi Water Quality Report 2026 | View Report |
| Bayfield Wi Water Quality Report 2026 | View Report |
| Bayside Wi Water Quality Report 2026 | View Report |
| Bear Creek Wi Water Quality Report 2026 | View Report |
| Beaver Dam Wi Water Quality Report 2026 | View Report |
| Belgium Wi Water Quality Report 2026 | View Report |
| Belleville Wi Water Quality Report 2026 | View Report |
| Belmont Wi Water Quality Report 2026 | View Report |
| Beloit Wi Water Quality Report 2026 | View Report |
| Berlin Wi Water Quality Report 2026 | View Report |
| Birchwood Wi Water Quality Report 2026 | View Report |
| Birnamwood Wi Water Quality Report 2026 | View Report |
| Black Creek Wi Water Quality Report 2026 | View Report |
| Black Earth Wi Water Quality Report 2026 | View Report |
| Black River Falls Wi Water Quality Report 2026 | View Report |
| Blair Wi Water Quality Report 2026 | View Report |
| Blanchardville Wi Water Quality Report 2026 | View Report |
| Bloomer Wi Water Quality Report 2026 | View Report |
| Bloomfield Hills Wi Water Quality Report 2026 | View Report |
| Bloomingdale Wi Water Quality Report 2026 | View Report |
| Bloomington Wi Water Quality Report 2026 | View Report |
| Blue Mounds Wi Water Quality Report 2026 | View Report |
| Blue River Wi Water Quality Report 2026 | View Report |
| Boca Raton Wi Water Quality Report 2026 | View Report |
| Bonduel Wi Water Quality Report 2026 | View Report |
| Boscobel Wi Water Quality Report 2026 | View Report |
| Boulder Wi Water Quality Report 2026 | View Report |
| Bowler Wi Water Quality Report 2026 | View Report |
| Boyceville Wi Water Quality Report 2026 | View Report |
| Boyd Wi Water Quality Report 2026 | View Report |
| Brandon Wi Water Quality Report 2026 | View Report |
| Brillion Wi Water Quality Report 2026 | View Report |
| Bristol Wi Water Quality Report 2026 | View Report |
| Brodhead Wi Water Quality Report 2026 | View Report |
| Brookfield Wi Water Quality Report 2026 | View Report |
| Brooklyn Wi Water Quality Report 2026 | View Report |
| Brown Deer Wi Water Quality Report 2026 | View Report |
| Browntown Wi Water Quality Report 2026 | View Report |
| Browsville Wi Water Quality Report 2026 | View Report |
| Bruce Wi Water Quality Report 2026 | View Report |
| Burlington Wi Water Quality Report 2026 | View Report |
| Butler Wi Water Quality Report 2026 | View Report |
| Butternut Wi Water Quality Report 2026 | View Report |
| Cadott Wi Water Quality Report 2026 | View Report |
| Caledonia Wi Water Quality Report 2026 | View Report |
| Cambria Wi Water Quality Report 2026 | View Report |
| Cambridge Wi Water Quality Report 2026 | View Report |
| Cameron Wi Water Quality Report 2026 | View Report |
| Camp Douglas Wi Water Quality Report 2026 | View Report |
| Campbellsport Wi Water Quality Report 2026 | View Report |
| Carlsbad Wi Water Quality Report 2026 | View Report |
| Cascade Wi Water Quality Report 2026 | View Report |
| Cashton Wi Water Quality Report 2026 | View Report |
| Cassville Wi Water Quality Report 2026 | View Report |
| Cazenovia Wi Water Quality Report 2026 | View Report |
| Cecil Wi Water Quality Report 2026 | View Report |
| Cedar Grove Wi Water Quality Report 2026 | View Report |
| Cedar Rapids Wi Water Quality Report 2026 | View Report |
| Cedarburg Wi Water Quality Report 2026 | View Report |
| Cedaredge Wi Water Quality Report 2026 | View Report |
| Centuria Wi Water Quality Report 2026 | View Report |
| Champlin Wi Water Quality Report 2026 | View Report |
| Charles Town Wi Water Quality Report 2026 | View Report |
| Chaseburg Wi Water Quality Report 2026 | View Report |
| Chetek Wi Water Quality Report 2026 | View Report |
| Chicago Wi Water Quality Report 2026 | View Report |
| Chilton Wi Water Quality Report 2026 | View Report |
| Chippewa Falls Wi Water Quality Report 2026 | View Report |
| Clarendon Hills Wi Water Quality Report 2026 | View Report |
| Clayton Wi Water Quality Report 2026 | View Report |
| Claytoon Wi Water Quality Report 2026 | View Report |
| Clear Lake Wi Water Quality Report 2026 | View Report |
| Cleveland Wi Water Quality Report 2026 | View Report |
| Clinton Wi Water Quality Report 2026 | View Report |
| Clintonville Wi Water Quality Report 2026 | View Report |
| Clyman Wi Water Quality Report 2026 | View Report |
| Cobb Wi Water Quality Report 2026 | View Report |
| Cochrane Wi Water Quality Report 2026 | View Report |
| Colby Wi Water Quality Report 2026 | View Report |
| Coleman Wi Water Quality Report 2026 | View Report |
| Colfax Wi Water Quality Report 2026 | View Report |
| Colgate Wi Water Quality Report 2026 | View Report |
| Coloma Wi Water Quality Report 2026 | View Report |
| Columbus Wi Water Quality Report 2026 | View Report |
| Combined Locks Wi Water Quality Report 2026 | View Report |
| Coon Valley Wi Water Quality Report 2026 | View Report |
| Cornell Wi Water Quality Report 2026 | View Report |
| Costa Mesa Wi Water Quality Report 2026 | View Report |
| Cottage Grove Wi Water Quality Report 2026 | View Report |
| Crandon Wi Water Quality Report 2026 | View Report |
| Crivitz Wi Water Quality Report 2026 | View Report |
| Cross Plains Wi Water Quality Report 2026 | View Report |
| Cuba City Wi Water Quality Report 2026 | View Report |
| Cudahy Wi Water Quality Report 2026 | View Report |
| Cumberland Wi Water Quality Report 2026 | View Report |
| Curtiss Wi Water Quality Report 2026 | View Report |
| Dallas Wi Water Quality Report 2026 | View Report |
| Dalton Wi Water Quality Report 2026 | View Report |
| Dane Wi Water Quality Report 2026 | View Report |
| Darien Wi Water Quality Report 2026 | View Report |
| Darlington Wi Water Quality Report 2026 | View Report |
| De Pere Wi Water Quality Report 2026 | View Report |
| Deerfield Wi Water Quality Report 2026 | View Report |
| Deforest Wi Water Quality Report 2026 | View Report |
| Delafield Wi Water Quality Report 2026 | View Report |
| Delavan Wi Water Quality Report 2026 | View Report |
| Denmark Wi Water Quality Report 2026 | View Report |
| Diamondhead Wi Water Quality Report 2026 | View Report |
| Dickeyville Wi Water Quality Report 2026 | View Report |
| Dodge Wi Water Quality Report 2026 | View Report |
| Dodgeville Wi Water Quality Report 2026 | View Report |
| Dorchester Wi Water Quality Report 2026 | View Report |
| Dousman Wi Water Quality Report 2026 | View Report |
| Downsville Wi Water Quality Report 2026 | View Report |
| Dresser Wi Water Quality Report 2026 | View Report |
| Drummond Wi Water Quality Report 2026 | View Report |
| Dunbar Wi Water Quality Report 2026 | View Report |
| Durand Wi Water Quality Report 2026 | View Report |
| Eagle River Wi Water Quality Report 2026 | View Report |
| Eagle Wi Water Quality Report 2026 | View Report |
| East Troy Wi Water Quality Report 2026 | View Report |
| Eastman Wi Water Quality Report 2026 | View Report |
| Eau Claire Wi Water Quality Report 2026 | View Report |
| Edgar Wi Water Quality Report 2026 | View Report |
| Edgerton Wi Water Quality Report 2026 | View Report |
| Edmund Wi Water Quality Report 2026 | View Report |
| Egg Harbor Wi Water Quality Report 2026 | View Report |
| Elcho Wi Water Quality Report 2026 | View Report |
| Eleva Wi Water Quality Report 2026 | View Report |
| Elk Mound Wi Water Quality Report 2026 | View Report |
| Elkhart Lake Wi Water Quality Report 2026 | View Report |
| Elkhorn Wi Water Quality Report 2026 | View Report |
| Ellison Bay Wi Water Quality Report 2026 | View Report |
| Ellsworth Wi Water Quality Report 2026 | View Report |
| Elm Grove Wi Water Quality Report 2026 | View Report |
| Elroy Wi Water Quality Report 2026 | View Report |
| Embarrass Wi Water Quality Report 2026 | View Report |
| Ettrick Wi Water Quality Report 2026 | View Report |
| Evansville Wi Water Quality Report 2026 | View Report |
| Exeland Wi Water Quality Report 2026 | View Report |
| Fairchild Wi Water Quality Report 2026 | View Report |
| Fairwater Wi Water Quality Report 2026 | View Report |
| Fall Creek Wi Water Quality Report 2026 | View Report |
| Fall River Wi Water Quality Report 2026 | View Report |
| Farmington Hills Wi Water Quality Report 2026 | View Report |
| Fennimore Wi Water Quality Report 2026 | View Report |
| Fifield Wi Water Quality Report 2026 | View Report |
| Fitchburg Wi Water Quality Report 2026 | View Report |
| Florence Wi Water Quality Report 2026 | View Report |
| Fond Du Lac Wi Water Quality Report 2026 | View Report |
| Fontana Wi Water Quality Report 2026 | View Report |
| Footville Wi Water Quality Report 2026 | View Report |
| Forest Junction Wi Water Quality Report 2026 | View Report |
| Fort Atkinson Wi Water Quality Report 2026 | View Report |
| Fort Mccoy Wi Water Quality Report 2026 | View Report |
| Fountain City Wi Water Quality Report 2026 | View Report |
| Fox Lake Wi Water Quality Report 2026 | View Report |
| Fox Point Wi Water Quality Report 2026 | View Report |
| Franklin Wi Water Quality Report 2026 | View Report |
| Frederic Wi Water Quality Report 2026 | View Report |
| Fredonia Wi Water Quality Report 2026 | View Report |
| Freedom Wi Water Quality Report 2026 | View Report |
| Friendship Wi Water Quality Report 2026 | View Report |
| Friesland Wi Water Quality Report 2026 | View Report |
| Galesville Wi Water Quality Report 2026 | View Report |
| Gays Mills Wi Water Quality Report 2026 | View Report |
| Genoa City Wi Water Quality Report 2026 | View Report |
| Genoa Wi Water Quality Report 2026 | View Report |
| Germantown Wi Water Quality Report 2026 | View Report |
| Gillett Wi Water Quality Report 2026 | View Report |
| Gilman Wi Water Quality Report 2026 | View Report |
| Glen Flora Wi Water Quality Report 2026 | View Report |
| Glenbeulah Wi Water Quality Report 2026 | View Report |
| Glendale Wi Water Quality Report 2026 | View Report |
| Glenwood City Wi Water Quality Report 2026 | View Report |
| Glidden Wi Water Quality Report 2026 | View Report |
| Goodman Wi Water Quality Report 2026 | View Report |
| Grafton Wi Water Quality Report 2026 | View Report |
| Grand Chute Wi Water Quality Report 2026 | View Report |
| Granton Wi Water Quality Report 2026 | View Report |
| Grantsburg Wi Water Quality Report 2026 | View Report |
| Gratiot Wi Water Quality Report 2026 | View Report |
| Grays Lake Wi Water Quality Report 2026 | View Report |
| Green Bay Wi Water Quality Report 2026 | View Report |
| Green Lake Wi Water Quality Report 2026 | View Report |
| Greendale Wi Water Quality Report 2026 | View Report |
| Greenfield Wi Water Quality Report 2026 | View Report |
| Greenleaf Wi Water Quality Report 2026 | View Report |
| Greenville Wi Water Quality Report 2026 | View Report |
| Greenwood Wi Water Quality Report 2026 | View Report |
| Gresham Wi Water Quality Report 2026 | View Report |
| Hager City Wi Water Quality Report 2026 | View Report |
| Hales Corners Wi Water Quality Report 2026 | View Report |
| Hammond Wi Water Quality Report 2026 | View Report |
| Hancock Wi Water Quality Report 2026 | View Report |
| Hartford Wi Water Quality Report 2026 | View Report |
| Hartland Wi Water Quality Report 2026 | View Report |
| Hatley Wi Water Quality Report 2026 | View Report |
| Haugen Wi Water Quality Report 2026 | View Report |
| Hawkins Wi Water Quality Report 2026 | View Report |
| Hawthorn Woods Wi Water Quality Report 2026 | View Report |
| Hayward Wi Water Quality Report 2026 | View Report |
| Hazel Green Wi Water Quality Report 2026 | View Report |
| Highbridge Wi Water Quality Report 2026 | View Report |
| Highland Wi Water Quality Report 2026 | View Report |
| Hilbert Wi Water Quality Report 2026 | View Report |
| Hillsboro Wi Water Quality Report 2026 | View Report |
| Hingham Wi Water Quality Report 2026 | View Report |
| Hinsdale Wi Water Quality Report 2026 | View Report |
| Hixton Wi Water Quality Report 2026 | View Report |
| Hobart Wi Water Quality Report 2026 | View Report |
| Hollandale Wi Water Quality Report 2026 | View Report |
| Holmen Wi Water Quality Report 2026 | View Report |
| Horicon Wi Water Quality Report 2026 | View Report |
| Hortonville Wi Water Quality Report 2026 | View Report |
| Hubertus Wi Water Quality Report 2026 | View Report |
| Hudson Wi Water Quality Report 2026 | View Report |
| Hurley Wi Water Quality Report 2026 | View Report |
| Hustisford Wi Water Quality Report 2026 | View Report |
| Hustler Wi Water Quality Report 2026 | View Report |
| Independence Wi Water Quality Report 2026 | View Report |
| Iola Wi Water Quality Report 2026 | View Report |
| Irma Wi Water Quality Report 2026 | View Report |
| Iron Belt Wi Water Quality Report 2026 | View Report |
| Iron Ridge Wi Water Quality Report 2026 | View Report |
| Iron River Wi Water Quality Report 2026 | View Report |
| Ironwood Wi Water Quality Report 2026 | View Report |
| Irvine Wi Water Quality Report 2026 | View Report |
| Ixonia Wi Water Quality Report 2026 | View Report |
| Jackson Wi Water Quality Report 2026 | View Report |
| Jacksonport Wi Water Quality Report 2026 | View Report |
| Janesville Wi Water Quality Report 2026 | View Report |
| Jefferson Wi Water Quality Report 2026 | View Report |
| Johnson Creek Wi Water Quality Report 2026 | View Report |
| Junction City Wi Water Quality Report 2026 | View Report |
| Juneau Wi Water Quality Report 2026 | View Report |
| Kansasville Wi Water Quality Report 2026 | View Report |
| Kaukauna Wi Water Quality Report 2026 | View Report |
| Kellnersville Wi Water Quality Report 2026 | View Report |
| Kendall Wi Water Quality Report 2026 | View Report |
| Kennan Wi Water Quality Report 2026 | View Report |
| Kenosha Wi Water Quality Report 2026 | View Report |
| Kewaskum Wi Water Quality Report 2026 | View Report |
| Kewaunee Wi Water Quality Report 2026 | View Report |
| Kiel Wi Water Quality Report 2026 | View Report |
| Kieler Wi Water Quality Report 2026 | View Report |
| Kimberly Wi Water Quality Report 2026 | View Report |
| King Wi Water Quality Report 2026 | View Report |
| Knapp Wi Water Quality Report 2026 | View Report |
| Kohler Wi Water Quality Report 2026 | View Report |
| La Crosse Wi Water Quality Report 2026 | View Report |
| La Farge Wi Water Quality Report 2026 | View Report |
| La Valle Wi Water Quality Report 2026 | View Report |
| Lacrosse Wi Water Quality Report 2026 | View Report |
| Ladysmith Wi Water Quality Report 2026 | View Report |
| Lake Delton Wi Water Quality Report 2026 | View Report |
| Lake Geneva Wi Water Quality Report 2026 | View Report |
| Lake Mills Wi Water Quality Report 2026 | View Report |
| Lake Tomahawk Wi Water Quality Report 2026 | View Report |
| Lake Villa Wi Water Quality Report 2026 | View Report |
| Lancaster Wi Water Quality Report 2026 | View Report |
| Land O Lakes Wi Water Quality Report 2026 | View Report |
| Lannon Wi Water Quality Report 2026 | View Report |
| Laona Wi Water Quality Report 2026 | View Report |
| Las Vegas Wi Water Quality Report 2026 | View Report |
| Lavalle Wi Water Quality Report 2026 | View Report |
| Lena Wi Water Quality Report 2026 | View Report |
| Libertyville Wi Water Quality Report 2026 | View Report |
| Linconwood Wi Water Quality Report 2026 | View Report |
| Linden Wi Water Quality Report 2026 | View Report |
| Little Chute Wi Water Quality Report 2026 | View Report |
| Little Suamico Wi Water Quality Report 2026 | View Report |
| Livingston Wi Water Quality Report 2026 | View Report |
| Lodi Wi Water Quality Report 2026 | View Report |
| Loganville Wi Water Quality Report 2026 | View Report |
| Lomira Wi Water Quality Report 2026 | View Report |
| Lone Rock Wi Water Quality Report 2026 | View Report |
| Los Angeles Wi Water Quality Report 2026 | View Report |
| Lowell Wi Water Quality Report 2026 | View Report |
| Loyal Wi Water Quality Report 2026 | View Report |
| Luck Wi Water Quality Report 2026 | View Report |
| Luxemburg Wi Water Quality Report 2026 | View Report |
| Lyndon Station Wi Water Quality Report 2026 | View Report |
| Madison Wi Water Quality Report 2026 | View Report |
| Maiden Rock Wi Water Quality Report 2026 | View Report |
| Manawa Wi Water Quality Report 2026 | View Report |
| Manitowoc Wi Water Quality Report 2026 | View Report |
| Maplewood Wi Water Quality Report 2026 | View Report |
| Marathon City Wi Water Quality Report 2026 | View Report |
| Marengo Wi Water Quality Report 2026 | View Report |
| Marinette Wi Water Quality Report 2026 | View Report |
| Marion Wi Water Quality Report 2026 | View Report |
| Markesan Wi Water Quality Report 2026 | View Report |
| Marshall Wi Water Quality Report 2026 | View Report |
| Marshfield Wi Water Quality Report 2026 | View Report |
| Mason Wi Water Quality Report 2026 | View Report |
| Mattoon Wi Water Quality Report 2026 | View Report |
| Mauston Wi Water Quality Report 2026 | View Report |
| Mayville Wi Water Quality Report 2026 | View Report |
| Mazomanie Wi Water Quality Report 2026 | View Report |
| Mcfarland Wi Water Quality Report 2026 | View Report |
| Medford Wi Water Quality Report 2026 | View Report |
| Mellen Wi Water Quality Report 2026 | View Report |
| Melrose Wi Water Quality Report 2026 | View Report |
| Menasha Wi Water Quality Report 2026 | View Report |
| Menomonee Falls Wi Water Quality Report 2026 | View Report |
| Menomonie Falls Wi Water Quality Report 2026 | View Report |
| Menomonie Wi Water Quality Report 2026 | View Report |
| Menonmonie Falls Wi Water Quality Report 2026 | View Report |
| Mequon Wi Water Quality Report 2026 | View Report |
| Mercer Wi Water Quality Report 2026 | View Report |
| Merrill Wi Water Quality Report 2026 | View Report |
| Merrillan Wi Water Quality Report 2026 | View Report |
| Merrimac Wi Water Quality Report 2026 | View Report |
| Miami Beach Wi Water Quality Report 2026 | View Report |
| Miami Wi Water Quality Report 2026 | View Report |
| Middleton Wi Water Quality Report 2026 | View Report |
| Milladore Wi Water Quality Report 2026 | View Report |
| Milltown Wi Water Quality Report 2026 | View Report |
| Milton Wi Water Quality Report 2026 | View Report |
| Milwaukee Wi Water Quality Report 2026 | View Report |
| Mindoro Wi Water Quality Report 2026 | View Report |
| Mineral Point Wi Water Quality Report 2026 | View Report |
| Minneapolis Wi Water Quality Report 2026 | View Report |
| Minocqua Wi Water Quality Report 2026 | View Report |
| Minong Wi Water Quality Report 2026 | View Report |
| Mishicot Wi Water Quality Report 2026 | View Report |
| Mondovi Wi Water Quality Report 2026 | View Report |
| Monona Wi Water Quality Report 2026 | View Report |
| Monroe Wi Water Quality Report 2026 | View Report |
| Montello Wi Water Quality Report 2026 | View Report |
| Montfort Wi Water Quality Report 2026 | View Report |
| Monticello Wi Water Quality Report 2026 | View Report |
| Montreal Wi Water Quality Report 2026 | View Report |
| Mosinee Wi Water Quality Report 2026 | View Report |
| Mount Calvary Wi Water Quality Report 2026 | View Report |
| Mount Hope Wi Water Quality Report 2026 | View Report |
| Mount Horeb Wi Water Quality Report 2026 | View Report |
| Mount Pleasant Wi Water Quality Report 2026 | View Report |
| Mt Calvary Wi Water Quality Report 2026 | View Report |
| Mt Horeb Wi Water Quality Report 2026 | View Report |
| Mt Pleasant Wi Water Quality Report 2026 | View Report |
| Mt Sterling Wi Water Quality Report 2026 | View Report |
| Mukwonago Wi Water Quality Report 2026 | View Report |
| Mundelein Wi Water Quality Report 2026 | View Report |
| Muscoda Wi Water Quality Report 2026 | View Report |
| Muskego Wi Water Quality Report 2026 | View Report |
| Nashotah Wi Water Quality Report 2026 | View Report |
| Necedah Wi Water Quality Report 2026 | View Report |
| Neenah Wi Water Quality Report 2026 | View Report |
| Neillsville Wi Water Quality Report 2026 | View Report |
| Nekoosa Wi Water Quality Report 2026 | View Report |
| Nelson Wi Water Quality Report 2026 | View Report |
| Neosho Wi Water Quality Report 2026 | View Report |
| New Auburn Wi Water Quality Report 2026 | View Report |
| New Berlin Wi Water Quality Report 2026 | View Report |
| New Franken Wi Water Quality Report 2026 | View Report |
| New Holstein Wi Water Quality Report 2026 | View Report |
| New Lisbon Wi Water Quality Report 2026 | View Report |
| New London Wi Water Quality Report 2026 | View Report |
| New Richmond Wi Water Quality Report 2026 | View Report |
| Niagara Wi Water Quality Report 2026 | View Report |
| Nichols Wi Water Quality Report 2026 | View Report |
| North Fond Du Lac Wi Water Quality Report 2026 | View Report |
| North Freedom Wi Water Quality Report 2026 | View Report |
| North Prairie Wi Water Quality Report 2026 | View Report |
| Northbrook Wi Water Quality Report 2026 | View Report |
| Norwalk Wi Water Quality Report 2026 | View Report |
| Oak Brook Wi Water Quality Report 2026 | View Report |
| Oak Creek Wi Water Quality Report 2026 | View Report |
| Oakdale Wi Water Quality Report 2026 | View Report |
| Oakfield Wi Water Quality Report 2026 | View Report |
| Oconomowoc Wi Water Quality Report 2026 | View Report |
| Oconto Falls Wi Water Quality Report 2026 | View Report |
| Oconto Wi Water Quality Report 2026 | View Report |
| Omro Wi Water Quality Report 2026 | View Report |
| Onalaska Wi Water Quality Report 2026 | View Report |
| Oneida Wi Water Quality Report 2026 | View Report |
| Ontario Wi Water Quality Report 2026 | View Report |
| Oostburg Wi Water Quality Report 2026 | View Report |
| Oregon Wi Water Quality Report 2026 | View Report |
| Orem Wi Water Quality Report 2026 | View Report |
| Orfordville Wi Water Quality Report 2026 | View Report |
| Orlando Wi Water Quality Report 2026 | View Report |
| Osceola Wi Water Quality Report 2026 | View Report |
| Oshkosh Wi Water Quality Report 2026 | View Report |
| Osseo Wi Water Quality Report 2026 | View Report |
| Owen Wi Water Quality Report 2026 | View Report |
| Paddock Lake Wi Water Quality Report 2026 | View Report |
| Palmyra Wi Water Quality Report 2026 | View Report |
| Pardeeville Wi Water Quality Report 2026 | View Report |
| Park Falls Wi Water Quality Report 2026 | View Report |
| Park Ridge Wi Water Quality Report 2026 | View Report |
| Patch Grove Wi Water Quality Report 2026 | View Report |
| Pence Wi Water Quality Report 2026 | View Report |
| Pepin Wi Water Quality Report 2026 | View Report |
| Peshtigo Wi Water Quality Report 2026 | View Report |
| Pewaukee Wi Water Quality Report 2026 | View Report |
| Phelps Wi Water Quality Report 2026 | View Report |
| Phillips Wi Water Quality Report 2026 | View Report |
| Pigeon Falls Wi Water Quality Report 2026 | View Report |
| Pittsville Wi Water Quality Report 2026 | View Report |
| Plain Wi Water Quality Report 2026 | View Report |
| Plainfield Wi Water Quality Report 2026 | View Report |
| Platteville Wi Water Quality Report 2026 | View Report |
| Plattville Wi Water Quality Report 2026 | View Report |
| Pleasant Prairie Wi Water Quality Report 2026 | View Report |
| Plover Wi Water Quality Report 2026 | View Report |
| Plum City Wi Water Quality Report 2026 | View Report |
| Plymouth Wi Water Quality Report 2026 | View Report |
| Port Edwards Wi Water Quality Report 2026 | View Report |
| Port Washington Wi Water Quality Report 2026 | View Report |
| Port Wing Wi Water Quality Report 2026 | View Report |
| Portage Wi Water Quality Report 2026 | View Report |
| Potomac Wi Water Quality Report 2026 | View Report |
| Potosi Wi Water Quality Report 2026 | View Report |
| Pound Wi Water Quality Report 2026 | View Report |
| Poynette Wi Water Quality Report 2026 | View Report |
| Prairie Du Chien Wi Water Quality Report 2026 | View Report |
| Prairie Du Sac Wi Water Quality Report 2026 | View Report |
| Prairie Farm Wi Water Quality Report 2026 | View Report |
| Prentice Wi Water Quality Report 2026 | View Report |
| Prescott Wi Water Quality Report 2026 | View Report |
| Princeton Wi Water Quality Report 2026 | View Report |
| Pulaski Wi Water Quality Report 2026 | View Report |
| Punta Gorda Wi Water Quality Report 2026 | View Report |
| Racine Wi Water Quality Report 2026 | View Report |
| Radisson Wi Water Quality Report 2026 | View Report |
| Randolph Wi Water Quality Report 2026 | View Report |
| Random Lake Wi Water Quality Report 2026 | View Report |
| Readstown Wi Water Quality Report 2026 | View Report |
| Redgranite Wi Water Quality Report 2026 | View Report |
| Reedsburg Wi Water Quality Report 2026 | View Report |
| Reedsville Wi Water Quality Report 2026 | View Report |
| Reeseville Wi Water Quality Report 2026 | View Report |
| Rewey Wi Water Quality Report 2026 | View Report |
| Rhinelander Wi Water Quality Report 2026 | View Report |
| Rib Lake Wi Water Quality Report 2026 | View Report |
| Rice Lake Wi Water Quality Report 2026 | View Report |
| Richland Center Wi Water Quality Report 2026 | View Report |
| Ridgeway Wi Water Quality Report 2026 | View Report |
| Rio Wi Water Quality Report 2026 | View Report |
| Ripon Wi Water Quality Report 2026 | View Report |
| River Falls Wi Water Quality Report 2026 | View Report |
| Roberts Wi Water Quality Report 2026 | View Report |
| Rock Springs Wi Water Quality Report 2026 | View Report |
| Rockford Wi Water Quality Report 2026 | View Report |
| Rockland Wi Water Quality Report 2026 | View Report |
| Rosendale Wi Water Quality Report 2026 | View Report |
| Rothschild Wi Water Quality Report 2026 | View Report |
| Saint Germain Wi Water Quality Report 2026 | View Report |
| Salem Wi Water Quality Report 2026 | View Report |
| San Francisco Wi Water Quality Report 2026 | View Report |
| Sandy Wi Water Quality Report 2026 | View Report |
| Santa Monica Wi Water Quality Report 2026 | View Report |
| Sauk City Wi Water Quality Report 2026 | View Report |
| Saukville Wi Water Quality Report 2026 | View Report |
| Schofield Wi Water Quality Report 2026 | View Report |
| Seneca Wi Water Quality Report 2026 | View Report |
| Sevierville Wi Water Quality Report 2026 | View Report |
| Sextonville Wi Water Quality Report 2026 | View Report |
| Seymour Wi Water Quality Report 2026 | View Report |
| Sharon Wi Water Quality Report 2026 | View Report |
| Shawano Wi Water Quality Report 2026 | View Report |
| Sheboygan Falls Wi Water Quality Report 2026 | View Report |
| Sheboygan Wi Water Quality Report 2026 | View Report |
| Shell Lake Wi Water Quality Report 2026 | View Report |
| Sherwood Wi Water Quality Report 2026 | View Report |
| Shiocton Wi Water Quality Report 2026 | View Report |
| Shorewood Wi Water Quality Report 2026 | View Report |
| Shullsburg Wi Water Quality Report 2026 | View Report |
| Silver Lake Wi Water Quality Report 2026 | View Report |
| Sinsinawa Wi Water Quality Report 2026 | View Report |
| Siren Wi Water Quality Report 2026 | View Report |
| Sister Bay Wi Water Quality Report 2026 | View Report |
| Skokie Wi Water Quality Report 2026 | View Report |
| Slinger Wi Water Quality Report 2026 | View Report |
| Soldiers Grove Wi Water Quality Report 2026 | View Report |
| Solon Springs Wi Water Quality Report 2026 | View Report |
| Somers Wi Water Quality Report 2026 | View Report |
| Somerset Wi Water Quality Report 2026 | View Report |
| South Milwaukee Wi Water Quality Report 2026 | View Report |
| South Range Wi Water Quality Report 2026 | View Report |
| South Wayne Wi Water Quality Report 2026 | View Report |
| Sparta Wi Water Quality Report 2026 | View Report |
| Spencer Wi Water Quality Report 2026 | View Report |
| Spring Green Wi Water Quality Report 2026 | View Report |
| Spring Valley Wi Water Quality Report 2026 | View Report |
| St Cloud Wi Water Quality Report 2026 | View Report |
| St Croix Falls Wi Water Quality Report 2026 | View Report |
| St Nazianz Wi Water Quality Report 2026 | View Report |
| St Paul Wi Water Quality Report 2026 | View Report |
| Stanley Wi Water Quality Report 2026 | View Report |
| Star Prairie Wi Water Quality Report 2026 | View Report |
| Stetsonville Wi Water Quality Report 2026 | View Report |
| Stevens Point Wi Water Quality Report 2026 | View Report |
| Stitzer Wi Water Quality Report 2026 | View Report |
| Stockbridge Wi Water Quality Report 2026 | View Report |
| Stoddard Wi Water Quality Report 2026 | View Report |
| Stone Lake Wi Water Quality Report 2026 | View Report |
| Stoughton Wi Water Quality Report 2026 | View Report |
| Stratford Wi Water Quality Report 2026 | View Report |
| Strum Wi Water Quality Report 2026 | View Report |
| Sturgeon Bay Wi Water Quality Report 2026 | View Report |
| Sturtevant Wi Water Quality Report 2026 | View Report |
| Suamico Wi Water Quality Report 2026 | View Report |
| Sun Prairie Wi Water Quality Report 2026 | View Report |
| Superior Wi Water Quality Report 2026 | View Report |
| Suring Wi Water Quality Report 2026 | View Report |
| Sussex Wi Water Quality Report 2026 | View Report |
| Tampa Wi Water Quality Report 2026 | View Report |
| Taylor Wi Water Quality Report 2026 | View Report |
| Theresa Wi Water Quality Report 2026 | View Report |
| Thiensville Wi Water Quality Report 2026 | View Report |
| Thorp Wi Water Quality Report 2026 | View Report |
| Three Lakes Wi Water Quality Report 2026 | View Report |
| Tigerton Wi Water Quality Report 2026 | View Report |
| Tomah Wi Water Quality Report 2026 | View Report |
| Tomahawk Wi Water Quality Report 2026 | View Report |
| Tony Wi Water Quality Report 2026 | View Report |
| Torrance Wi Water Quality Report 2026 | View Report |
| Trempealeau Wi Water Quality Report 2026 | View Report |
| Trevor Wi Water Quality Report 2026 | View Report |
| Troy Center Wi Water Quality Report 2026 | View Report |
| Turtle Lake Wi Water Quality Report 2026 | View Report |
| Twin Lakes Wi Water Quality Report 2026 | View Report |
| Two Rivers Wi Water Quality Report 2026 | View Report |
| Union Center Wi Water Quality Report 2026 | View Report |
| Union Grove Wi Water Quality Report 2026 | View Report |
| Valders Wi Water Quality Report 2026 | View Report |
| Verona Wi Water Quality Report 2026 | View Report |
| Vesper Wi Water Quality Report 2026 | View Report |
| Viola Wi Water Quality Report 2026 | View Report |
| Viroqua Wi Water Quality Report 2026 | View Report |
| Wabeno Wi Water Quality Report 2026 | View Report |
| Waldo Wi Water Quality Report 2026 | View Report |
| Wales Wi Water Quality Report 2026 | View Report |
| Walworth Wi Water Quality Report 2026 | View Report |
| Warrens Wi Water Quality Report 2026 | View Report |
| Washburn Wi Water Quality Report 2026 | View Report |
| Waterford Wi Water Quality Report 2026 | View Report |
| Waterloo Wi Water Quality Report 2026 | View Report |
| Watertown Wi Water Quality Report 2026 | View Report |
| Waukesha Wi Water Quality Report 2026 | View Report |
| Waunakee Wi Water Quality Report 2026 | View Report |
| Waupun Wi Water Quality Report 2026 | View Report |
| Wausau Wi Water Quality Report 2026 | View Report |
| Wausaukee Wi Water Quality Report 2026 | View Report |
| Wautoma Wi Water Quality Report 2026 | View Report |
| Wauwatosa Wi Water Quality Report 2026 | View Report |
| Wauzeka Wi Water Quality Report 2026 | View Report |
| Webster Wi Water Quality Report 2026 | View Report |
| Wentworth Wi Water Quality Report 2026 | View Report |
| West Allis Wi Water Quality Report 2026 | View Report |
| West Bend Wi Water Quality Report 2026 | View Report |
| West Covina Wi Water Quality Report 2026 | View Report |
| West Des Moines Wi Water Quality Report 2026 | View Report |
| West Salem Wi Water Quality Report 2026 | View Report |
| Westboro Wi Water Quality Report 2026 | View Report |
| Westby Wi Water Quality Report 2026 | View Report |
| Westfield Wi Water Quality Report 2026 | View Report |
| Weston Wi Water Quality Report 2026 | View Report |
| Weyauwega Wi Water Quality Report 2026 | View Report |
| Weyerhaeuser Wi Water Quality Report 2026 | View Report |
| Wheeler Wi Water Quality Report 2026 | View Report |
| White Bear Lake Wi Water Quality Report 2026 | View Report |
| White Lake Wi Water Quality Report 2026 | View Report |
| Whitehall Wi Water Quality Report 2026 | View Report |
| Whitelaw Wi Water Quality Report 2026 | View Report |
| Whitewater Wi Water Quality Report 2026 | View Report |
| Wild Rose Wi Water Quality Report 2026 | View Report |
| Williams Bay Wi Water Quality Report 2026 | View Report |
| Wilmot Wi Water Quality Report 2026 | View Report |
| Wilson Wi Water Quality Report 2026 | View Report |
| Wilton Wi Water Quality Report 2026 | View Report |
| Windsor Wi Water Quality Report 2026 | View Report |
| Winnebago Wi Water Quality Report 2026 | View Report |
| Winneconne Wi Water Quality Report 2026 | View Report |
| Winter Wi Water Quality Report 2026 | View Report |
| Wisconsin Dells Wi Water Quality Report 2026 | View Report |
| Wisconsin Rapids Wi Water Quality Report 2026 | View Report |
| Withee Wi Water Quality Report 2026 | View Report |
| Wittenberg Wi Water Quality Report 2026 | View Report |
| Wonewoc Wi Water Quality Report 2026 | View Report |
| Woodruff Wi Water Quality Report 2026 | View Report |
| Woodville Wi Water Quality Report 2026 | View Report |
| Wrightstown Wi Water Quality Report 2026 | View Report |
| Wyocena Wi Water Quality Report 2026 | View Report |
| Yuba Wi Water Quality Report 2026 | View Report |
| Zion Wi Water Quality Report 2026 | View Report |
What Does This Mean For You?
Detecting Nitrates in your water supply does not necessarily mean immediate danger, but long-term exposure -- even at low levels -- carries measurable health risk. Reverse osmosis is the most effective method for removing nitrates from drinking water.
Our recommendation: View Nitrates filters certified for Wisconsin water conditions or take our free Water Finder Quiz to get a personalized recommendation.
Filter Nitrates From Your Wisconsin Tap Water
PureWaterGuys carries NSF-certified filters proven to reduce Nitrates and other contaminants found in Wisconsin water.
Shop Nitrates Filters Take the Water QuizFrequently Asked Questions
What is Nitrates?
High nitrate levels cause methemoglobinemia (blue baby syndrome) in infants. EPA MCL is 10 mg/L.
Is Wisconsin tap water safe to drink?
Water quality varies by city. Of the Wisconsin systems we analyzed, 627 detected Nitrates. Most levels are below EPA action thresholds, but long-term low-level exposure carries health risk. Check your city's report above or use a certified home filter as a precaution.
What filter removes Nitrates from tap water?
Reverse osmosis is the most effective method for removing nitrates from drinking water. See our Nitrates filter options.
Data sourced from EPA-mandated annual water quality reports (Consumer Confidence Reports). Last updated: 2026. Not all systems are required to test for every contaminant.