| Municipality/District | Municipality/District | Municipality/District |
|---|---|---|
| Village of Adell | Village of Albany | Algoma Sanitary District #1 |
| City of Algoma | Village of Allouez | Village of Alma Center |
| City of Alma | Village of Almena | City of Altoona |
| City of Amery | Village of Amherst | City of Arcadia |
| Village of Arena | Village of Argyle | Village of Arlington |
| Ashippun Sanitary District | Village of Athens | Village of Auburndale |
| City of Augusta | Village of Avoca | Village of Bagley |
| Village of Baldwin | Village of Balsam Lake | Village of Bangor |
| Village of Barneveld | City of Barron | City of Bayfield |
| Village of Bear Creek | City of Beaver Dam | Village of Belgium |
| Village of Belleville | Village of Belmont | City of Beloit |
| Town of Beloit | City of Berlin | Big Round Lake Protection & Rehabilitation District |
| Village of Birchwood | Village of Biron | Village of Black Creek |
| Village of Black Earth | City of Black River Falls | City of Blair |
| City of Bloomer | Village of Bloomington | Village of Blue Mounds |
| Village of Blue River | Bluffview Sanitary District | City of Boscobel |
| Village of Bowler | Village of Boyceville | Village of Boyd |
| City of Brillion | Village of Bristol | Brockway Sanitary District #1 |
| City of Brodhead | City of Brookfield | Village of Brooklyn |
| Village of Browntown | Village of Bruce | City of Burlington |
| Burnett Sanitary District #1 | Village of Butternut | Village of Caledonia |
| Village of Cambria | Village of Cambridge | Village of Cameron |
| Village of Camp Douglas | Village of Campbellsport | Village of Cascade |
| Village of Casco | Village of Cashton | Village of Cassville |
| Village of Cazenovia | Village of Cedar Grove | Central Brown County Water Authority |
| Village of Chaseburg | City of Chetek | Chili Sanitary District #1 |
| City of Chilton | Clarks Mills Sanitary District | City of Clintonville |
| Village of Cobb | City of Colby | Village of Coleman |
| City of Columbus | Village of Conrath | Consolidated Koshkonong Sanitary Commission |
| City of Cornell | Village of Cottage Grove | City of Crandon |
| Village of Cross Plains | City of Cumberland | Village of Curtiss |
| Dale Sanitary District #1 | Village of Dallas | Village of Dane |
| City of Darlington | Village of De Soto | Village of Deer Park |
| Village of Deerfield | City of Delavan | Village of Denmark |
| Village of Dickeyville | City of Dodgeville | Village of Dorchester |
| Village of Dousman | Town of Dover | Village of Dresser |
| City of Durand | Village of East Troy | Village of Eastman |
| Village of Eden | Village of Edgar | City of Edgerton |
| Village of Egg Harbor | City of Elkhorn | Village of Ellsworth |
| City of Elroy | Village of Ephraim | City of Evansville |
| Village of Fairwater | Village of Fall Creek | Town of Farmington Sanitary District |
| City of Fennimore | Village of Ferryville | Town of Florence |
| City of Fond du Lac | Village of Fontana | Forest Junction Sanitary District |
| City of Fort Atkinson | City of Fountain City | Village of Fox Crossing |
| Fox West Regional Sewerage Commission | City of Franklin | Village of Frederic |
| Village of Fredonia | Freedom Sanitary District #1 | Village of Friesland |
| City of Galesville | Village of Genoa | City of Gillett |
| Village of Glen Flora | City of Glenwood City | Glidden Sanitary District |
| Village of Grafton | Village of Granton | Village of Grantsburg |
| Village of Gratiot | Green Lake Sanitary District | City of Green Lake |
| Village of Greendale | Village of Greenleaf | Village of Greenville |
| City of Greenwood | Village of Gresham | Village of Hales Corners |
| Village of Hammond | Village of Hancock | Hatfield Sanitary District #1 |
| Village of Haugen | Village of Hawkins | City of Hayward |
| Village of Highland | Village of Hilbert | Hillpoint Sanitary District |
| City of Hillsboro | Hingham Sanitary District | Village of Hobart |
| Ho-Chunk Nation | Holland Sanitary District #1 | Village of Holmen |
| City of Horicon | Village of Hortonville | Village of Howards Grove |
| City of Hudson | City of Hurley | City of Independence |
| Village of Iron Ridge | Iron River Sanitary District #1 | Town of Ixonia |
| Village of Jackson | City of Jefferson | Village of Johnson Creek |
| Village of Junction City | City of Juneau | Village of Kellnersville |
| Kelly Lake Sanitary District #1 | Village of Kendall | Village of Kewaskum |
| City of Kewaunee | Krakow Sanitary District No. 1 | Village of Kronenwetter |
| City of La Crosse | Village of La Farge | Village of La Valle |
| City of Ladysmith | Village of Lake Delton | Village of Lake Hallie |
| Lake Tomahawk Sanitary Dist #1 | Lakeland Sanitary District #1 | City of Lancaster |
| Larsen Winchester Sanitary District | Lebanon Sanitary District #1 | Village of Lena |
| Village of Little Chute | Little Suamico Sanitary District #1 | City of Lodi |
| Village of Loganville | Village of Lomira | Village of Lone Rock |
| Village of Lowell | City of Loyal | Village of Luck |
| Village of Lyndon Station | Village of Lynxville | Lyons Sanitary District #2 |
| Madeline Sanitary District | Village of Maiden Rock | Village of Maine |
| Maple Grove Sanitary District | Village of Marathon City | City of Markesan |
| Village of Marshall | Village of Mattoon | City of Mauston |
| City of Mayville | Village of Mazomanie | Village of McFarland |
| City of Mellen | Village of Melrose | City of Menomonie |
| City of Merrill | Village of Merrillan | Village of Merrimac |
| Village of Milladore | City of Mineral Point | Village of Minong |
| Village of Mishicot | City of Monroe | Village of Montfort |
| Village of Monticello | City of Montreal | City of Mosinee |
| Village of Mount Horeb | Village of Mount Pleasant | Village of Mount Sterling |
| Village of Muscoda | City of Muskego | Village of Necedah |
| Neenah - Menasha Sewerage Commission | City of Neenah | City of Nekoosa |
| Village of Nelson | Village of Neshkoro | Village of New Auburn |
| City of New Berlin | Village of New Glarus | City of New Holstein |
| City of New Lisbon | City of New Richmond | Village of Newburg |
| City of Niagara | Village of North Freedom | Village of Norwalk |
| Norway Sanitary District #1 | City of Oak Creek | Village of Oakfield |
| Town of Oakland Sanitary District #1 | City of Oconto Falls | O'Dell's Bay Sanitary District #1 |
| City of Omro | City of Onalaska | Village of Ontario |
| Village of Oostburg | Village of Oregon | Village of Orfordville |
| Village of Osceola | City of Osseo | City of Owen |
| Village of Paddock Lake | Village of Palmyra | City of Park Falls |
| Village of Patch Grove | Village of Pepin | City of Peshtigo |
| City of Pewaukee | Phelps Sanitary District #1 | City of Phillips |
| City of Pittsville | Village of Plain | City of Platteville |
| Village of Plover | Village of Plum City | Village of Poplar |
| City of Portage | Portland Sanitary District #1 | Village of Pound |
| Village of Poynette | City of Prairie du Chien | Village of Prairie du Sac |
| Village of Prentice | City of Princeton | Village of Pulaski |
| Village of Radisson | Village of Randolph | Village of Random Lake |
| Village of Redgranite | City of Reedsburg | Village of Reedsville |
| Village of Reeseville | Village of Rewey | City of Rhinelander |
| Village of Rib Lake | City of Rice Lake | City of Richland Center |
| Richmond Sanitary District #1 | Village of Ridgeway | Village of Rio |
| City of Ripon | City of River Falls | Village of Roberts |
| Village of Rock Springs | Village of Rockdale | Rockland Sanitary District #1 |
| Village of Rockland | Town of Rome | Village of Rosendale |
| Village of Saint Cloud | City of Saint Croix Falls | Village of Saint Nazianz |
| Village of Salem Lakes | Village of Saukville | Seneca Sanitary District #1 |
| City of Seymour | Village of Sharon | City of Shawano |
| City of Sheboygan Falls | Shelby Sanitary District #2 | Village of Sheldon |
| City of Shell Lake | Village of Sherwood | Village of Shorewood |
| City of Shullsburg | Village of Siren | Village of Slinger |
| Village of Soldiers Grove | Village of Somers | Village of Somerset |
| Village of South Wayne | City of Sparta | Village of Spencer |
| Village of Spring Green | Village of Spring Valley | St. Joseph's Sanitary District No. 1 |
| City of Stanley | City of Stevens Point | Village of Stockbridge |
| Village of Stoddard | City of Stoughton - Utilities | Village of Stratford |
| City of Sturgeon Bay | Village of Superior | Village of Suring |
| Village of Sussex | Village of Tennyson | Village of Theresa |
| City of Thorp | Three Lakes Sanitary District #1 | Village of Tigerton |
| City of Tomah | City of Tomahawk | Village of Tony |
| Village of Trempealeau | Village of Turtle Lake | Village of Twin Lakes |
| Village of Union Grove | Village of Waldo | Walworth County Metropolitan Sewerage District |
| City of Washburn | Waterford Sanitary District #1 | Village of Waterford |
| City of Waterloo | City of Waupaca | Village of Wausaukee |
| Village of Wauzeka | Village of Webster | City of West Allis |
| Village of West Baraboo | Village of West Salem | Westboro Sanitary District #1 |
| City of Westby | Western Racine County Sewerage District | Village of Weyerhaeuser |
| Village of Whitefish Bay | City of Whitehall | Village of Whitelaw |
| Village of Whiting | Village of Windsor | Village of Winneconne |
| Village of Winter | City of Wisconsin Dells | City of Wisconsin Rapids |
| Village of Withee | Village of Woodville | Village of Wrightstown |
| Village of Yorkville |