| Pine Bluffs Wastewater Lagoon | Pine Bluffs | 10 |
| Riverside Waste Water Treatment Facility | Casper | 7.47 |
| Sam H. Hobbs Regional WW Facility (prev. Casper Wwtf) | Casper | 6.63 |
| Dry Creek Water Reclamation Facility | Cheyenne | 4.85 |
| Gillette WWTF | Gillette | 2.97 |
| Powell, City Of | Powell | 2.87 |
| Sheridan Wastewater Treatment | Sheridan | 2.58 |
| Jackson Wastewater Lagoon | Jackson | 2.16 |
| Rock Springs Water Reclamation Facility | Rock Springs | 2.01 |
| Lander Wastewater Lagoon | Lander | 1.46 |
| Evanston WWTF | Evanston | 1.14 |
| Buffalo WWTP | Buffalo | 0.9 |
| Worland Wastewater Lagoon | Worland | 0.7 |
| Green River Wastewater Treatment Plant | Green River | 0.69 |
| Basin Wastewater Lagoon | Basin | 0.56 |
| Cody Wastewater Lagoon | Cody | 0.51 |
| City Of Rawlins Wastewater Treatment Facility | Rawlins | 0.49 |
| Torrington Wastewater Lagoons | Torrington | 0.49 |
| Douglas Wastewater Lagoon | Douglas | 0.44 |
| Marbleton Wastewater Lagoon | Marbleton | 0.4 |
| Lyman Wastewater Lagoon | Lyman | 0.39 |
| Thayne Wastewater Lagoon | Thayne | 0.27 |
| Thermopolis WWTF | Thermopolis | 0.26 |
| Mountain View Wastewater Lagoon | Mountain View | 0.26 |
| Hudson Wastewater Lagoon | Hudson | 0.25 |
| Kemmerer Wastewater Treatment | Kemmerer | 0.23 |
| Big Piney Wastewater Lagoon | Big Piney | 0.19 |
| Chief Washakie Recreation Comp | Fort Washakie | 0.18 |
| Saratoga Wastewater Lagoons | Saratoga | 0.18 |
| Town Of Bear River Wastewater Lagoons | Bear River | 0.17 |
| Fort Bridger Sewer District | | 0.14 |
| Ranchester Wastewater Lagoons | Ranchester | 0.11 |
| Hartville Wastewater Treatment | Hartville | 0.11 |
| Moorcroft Wastewater Lagoon | Moorcroft | 0.1 |
| Wright Wastewater Treatment | Wright | 0.09 |
| Dubois Wastewater Lagoon | Dubois | 0.09 |
| Glenrock Wastewater Lagoon | Glenrock | 0.09 |
| Ten Sleep Wastewater Lagoons | Ten Sleep | 0.09 |
| Baggs Wastewater Lagoons | Baggs | 0.09 |
| Byron Wastewater Lagoon | Byron | 0.08 |
| Upton Wastewater Lagoon | Upton | 0.08 |
| Cokeville Wastewater Treatment Plant | Cokeville | 0.06 |
| Encampment Wastewater Lagoon | Encampment | 0.04 |
| Town Of Dixon Wastewater Treatment Lagoon | Dixon | 0.04 |
| Manderson Sewer Project | Manderson | 0.02 |
| Labarge Wastewater Lagoon | | 0.01 |
| Ethete Water Treatment Plant | Ethete | 0.01 |
| Burlington Wastewater Lagoon (10/2019) | | — |
| Clearmont Wastewater Lagoons | Clearmont | — |
| Deaver Wastewater Lagoon | Deaver | — |
| Fort Laramie Wastewater Lagoon | Fort Laramie | — |
| Frannie Wastewater Lagoons | Frannie | — |
| Great Plains Hall Wastewater | Fort Washakie | — |
| Greybull Wastewater Lagoon | Greybull | — |
| Guernsey Wastewater Lagoon | Guernsey | — |
| Hanna Wastewater Lagoon System | Hanna | — |
| Kaycee WWTF | Kaycee | — |
| Meeteetse Wastewater Lagoons | Meeteetse | — |
| Rock River Wastewater Lagoon | Rock River | — |
| Sinclair Wastewater Lagoon | Sinclair | — |
