| 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 | 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 | 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 |