| 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 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 | Village of Bowler | Village of Boyceville |
| City of Brillion | Village of Bristol | 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 | 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 | 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 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 | 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 | 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 | 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 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 Poynette | City of Prairie du Chien | Village of Prairie du Sac |
| 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 | 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 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 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 |
| 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 |