| Estelline, City Of | Estelline | 309.22 |
| Veblen, City Of | Veblen | 286 |
| Eagle Butte WWTF | Eagle Butte | 223 |
| Mitchell, City Of | Mitchell | 13.67 |
| Rapid City Water Reclamation Facility | Rapid City | 10.74 |
| Worthing, City Of | Worthing | 7.36 |
| Watertown, City Of | Watertown | 6.63 |
| Tea, City Of | Tea, City Of | 3.2 |
| Lead, City Of - Cso | Lead | 3.07 |
| Rosebud Community | Rosebud | 3.04 |
| New Effington, Town Of | New Effington | 2.51 |
| Wilmot, City Of | Wilmot | 2.35 |
| Lead - Deadwood Sanitary District | Deadwood | 2.35 |
| Tyndall, City Of | Tyndall | 2.3 |
| Scotland, City Of | Scotland | 1.9 |
| Salem, City Of | Salem | 1.73 |
| Wagner, City Of | Wagner | 1.64 |
| South Dakota Ellsworth Development Authority | Box Elder | 1.63 |
| Pierre, City Of | Pierre | 1.62 |
| Vermillion, City Of | Vermillion | 1.57 |
| Spearfish, City Of (wtp) | Spearfish | 1.3 |
| Canton, City Of | Canton | 1.08 |
| Beresford, City Of | Beresford | 1.06 |
| Groton, City Of | Groton | 0.9 |
| Grand River Casino And Resort | Mobridge | 0.86 |
| Toronto, Town Of | Toronto | 0.82 |
| Clear Lake, City Of | Clear Lake | 0.72 |
| Freeman, City Of | Freeman | 0.69 |
| Langford, Town Of | Langford | 0.58 |
| Frederick, Town Of | Frederick | 0.55 |
| Roscoe, City Of | Roscoe | 0.55 |
| Harrisburg - City Of | Harrisburg, City Of | 0.51 |
| Hot Springs, City Of | Hot Springs | 0.43 |
| Canistota, City Of | Canistota | 0.42 |
| Bryant, City Of | Bryant | 0.38 |
| Colome, City Of | Colome | 0.37 |
| Oacoma, Town Of | Oacoma | 0.37 |
| Hartford, City Of | Hartford | 0.37 |
| Volga, City Of | Volga, City Of | 0.33 |
| Arlington, City Of | Arlington | 0.29 |
| Eureka, City Of | Eureka | 0.29 |
| Ft Pierre - City Of | Fort Pierre | 0.26 |
| Hill City, City Of | Hill City | 0.23 |
| Lennox, City Of | Lennox | 0.23 |
| Mobridge, City Of | Mobridge | 0.21 |
| Summerset, City Of | Summerset | 0.21 |
| Dell Rapids, City Of | Dell Rapids | 0.2 |
| Keystone, Town Of | Keystone | 0.19 |
| Iroquois, City Of | Iroquois | 0.14 |
| Andover, Town Of | Andover | 0.13 |
| North Sioux City, City Of (wtp) | North Sioux City | 0.1 |
| Springfield, City Of | Springfield | 0.1 |
| Stickney, Town Of | Stickney | 0.09 |
| Roslyn, Town Of | Roslyn | 0.07 |
| Labolt, Town Of | Labolt | 0.06 |
| Elkton, City Of | Elkton, City Of | 0.01 |
| Hermosa - Town Of | Hermosa | 0.01 |
| Armour, City Of | Armour | — |
| Ashton, Town Of | Ashton | — |
| Avon, City Of | Avon, City Of | — |
| Belle Fourche WTP | Belle Fourche | — |
| Big Bend Lagoon System | Fort Thompson | — |
| Black Pipe, Community Of | Rosebud | — |
| Blunt- City Of | Blunt | — |
| Bonesteel- City Of | Bonesteel | — |
| Bridgewater, City Of | Bridgewater | — |
| Cavour, Town Of | Cavour | — |
| Chancellor, Town Of | Chancellor | — |
| Colman, City Of | Colman | — |
| Corsica, City Of | Corsica | — |
| Crooks, City Of | Crooks | — |
| Crow Creek Lagoon System | Fort Thompson | — |
| Emery, City Of | Emery | — |
| Ethan - Town Of | Ethan, Town Of | — |
| Flandreau, City Of | Flandreau | — |
| Fort Thompson Lagoon System | Fort Thompson | — |
| Garretson, City Of | Garretson | — |
| Gregory- City Of__________(e) | Gregory | — |
| Hitchcock, Town Of | Hitchcock | — |
| Howard, City Of | Howard, City Of | — |
| Huron, City Of | Huron | — |
| Irene - City Of | Irene | — |
| Kennebec, Town Of | Kennebec | — |
| Kimball, City Of | Kimball | — |
| Lake Andes, City Of | Lake Andes | — |
| Lake Cochrane Sanitary District | Gary | — |
| Leola, City Of | Leola | — |
| Madison-Treatment Plant | Madison | — |
| Manderson Community Lagoon | Manderson | — |
| Marion, City Of | Marion | — |
| Martin Sunrise Housing WW Lagoon | Martin | — |
| Marty Community Wastewater Lagoon | Marty | — |
| Mellette , City Of | Mellette | — |
| Menno, City Of | Menno | — |
| Monroe, Town Of | Monroe | — |
| Murdo, City Of | Murdo | — |
| Oglala Community Lagoon | Oglala | — |
| Parmelee Community | Parmelee | — |
| Platte, City Of | Platte | — |
| Porcupine Community Lagoon | Porcupine | — |
| Potato Creek Community Lagoon | Pine Ridge | — |
| Red Shirt Community Lagoon Facility | Red Shirt | — |
| Reliance - Town Of | Reliance | — |
| Rosholt, Town Of | Rosholt | — |
| Sd Gf&p Game Lodge (custer State Park) | Custer | — |
| Selby, City Of | Selby | — |
| Sharp'S Corner Lagoon System | Kyle | — |
| St. Lawrence, Town Of | St. Lawrence | — |
| Stephan Lagoon System | Stephan | — |
| Sturgis, City Of | Sturgis | — |
| Tabor - Town Of | Tabor | — |
| Tripp, City Of | Tripp | — |
| Viborg - City Of | Viborg | — |
| Wakpamni Community Lagoon | Pine Ridge | — |
| Warner, Town Of | Warner | — |
| Wessington Springs, City Of | Wessington Springs | — |
| West Brule Lagoon North | Lower Brule | — |
| West Brule Lagoon South | Lower Brule | — |
| White River - City Of | White River | — |
| White Water Distribution (wtp) | White | — |
| Wolf Creek Lagoon | Pine Ridge | — |
| Wounded Knee Community Lagoon | Pine Ridge | — |
