| 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 Antigo |
| 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 Bayside | 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 | Town of Campbell |
| 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 | 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 | 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 |
| Village of Germantown | Gibbsville Sanitary District | 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 | 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 Marinette | City of Markesan | Village of Marshall |
| City of Mauston | City of Mayville | Village of Mazomanie |
| Village of McFarland | City of Medford | City of Mellen |
| Village of Melrose | City of Menomonie | City of Merrill |
| Village of Merrillan | Village of Merrimac | 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 Mukwonago | 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 Fond du Lac | 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 Oshkosh | 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 | Village of Pewaukee |
| City of Phillips | Pikes Bay Sanitary District | City of Pittsville |
| Village of Plain | Village of Plover | Village of Plum City |
| Village of Poplar | Village of Port Edwards | 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 | City of South Milwaukee |
| 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 Suamico | City of Sun Prairie | 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 |
| City of Two Rivers | Village of Union Grove | Village of Vesper |
| City of Viroqua | Village of Waldo | Walworth County Metropolitan Sewerage District |
| Village of Walworth | City of Washburn | Village of Waterford |
| City of Waterloo | City of Watertown | 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 |
| City of Weyauwega | Village of Weyerhaeuser | Village of Whitefish Bay |
| City of Whitehall | Village of Whitelaw | City of Whitewater |
| Village of Whiting | Village of Windsor | Village of Winneconne |
| Village of Winter | Wiota Sanitary District #1 | City of Wisconsin Dells |
| City of Wisconsin Rapids | Village of Withee | Village of Woodville |
| Village of Wrightstown | Village of Yorkville |