| Bigfork County Water And Sewer | Bigfork | 106.79 |
| Big Timber | Big Timber | 43.47 |
| City Of Billings Wastewater Treatment Plant | Billings | 22.66 |
| City Of Great Falls WWTP | Great Falls | 10.52 |
| City Of Missoula WWTF No Exposure | Missoula | 7.97 |
| City Of Bozeman WWTP | Bozeman | 7.12 |
| City Of Kalispell WWTP | Kalispell | 3.42 |
| Two Medicine Water Co. | Browning | 3.3 |
| City Of Helena WWTP | Helena | 3.04 |
| Lewistown WWTP | Lewistown | 2.39 |
| Havre WWTF | Havre | 1.75 |
| Miles City WWTP | Miles City | 1.32 |
| Deer Lodge WWTP | Deer Lodge | 1.3 |
| Ronan City WWTF | Ronan | 1.02 |
| City Of Glendive Water Resource & Recovery Facility | Glendive | 0.93 |
| Water Reclamation Facility | Livingston | 0.81 |
| City Of Hamilton Wastewater Treatment Plant | Hamilton | 0.76 |
| Red Lodge WWTF | Red Lodge | 0.7 |
| City Of Glasgow Parks Maintenance Bldg | Glasgow | 0.7 |
| City Of Polson WWTP | Polson | 0.65 |
| Town Of Poplar WTP | Poplar | 0.55 |
| City Of Shelby Wastewater Lagoons | Shelby | 0.53 |
| Columbia Falls WWTP | Columbia Falls | 0.44 |
| Northern Cheyenne Utility Commission Wastewater Treatment Plant | Lame Deer | 0.39 |
| City Of Belgrade- Belgrade Wastewater Treatment Plant | Belgrade | 0.39 |
| Three Forks WWTF | Three Forks | 0.36 |
| Ennis WWTP | Ennis | 0.33 |
| Town Of Terry WWTF | Terry | 0.32 |
| Great Falls WTP | Great Falls | 0.31 |
| City Of Troy Wastewater Treatment Facility | Troy | 0.29 |
| City Of Laurel, Water Treatment Plant | Laurel | 0.29 |
| Libby WWTP | Libby | 0.28 |
| Choteau Sewage Treatment Ponds | Choteau | 0.27 |
| Manhattan WWTF | Manhattan | 0.27 |
| Forsyth WWTP | Forsyth | 0.24 |
| City Of Townsend Wastewater Treatment Plant | Townsend | 0.23 |
| East Helena WWTF | East Helena | 0.21 |
| Stevensville Waste Water Treatment Plant | Stevensville | 0.21 |
| City Of Conrad WWTF | Conrad | 0.19 |
| City Of Cut Bank WWTF | Cut Bank | 0.18 |
| City Of Bozeman - Lyman Creek Reservoir | Bozeman | 0.17 |
| Gardiner Wastewater Treatment Facility | Gardiner | 0.16 |
| Anaconda-Deer Lodge County Wastewater Holding Ponds And Ip Beds Facility | Anaconda | 0.16 |
| Bozeman Water Treatment Plant | Bozeman | 0.15 |
| Town Of Columbus - Waste Water Treatment Facility | Columbus | 0.15 |
| River Rock Subdivision | Belgrade | 0.15 |
| Town Of Darby WWTF | Darby | 0.15 |
| Montana State Hospital Sewage Treatment Lagoons | Warm Springs | 0.13 |
| City Of Chinook WTP | Chinook | 0.12 |
| Town Of Broadus WWTF | Broadus | 0.12 |
| City Of Harlowton WWTF | Harlowton | 0.1 |
| Hot Springs, Town Of | Hot Springs | 0.1 |
| Town Of Plains WWTP | Plains | 0.1 |
| Town Of Philipsburg WWTP | Philipsburg | 0.09 |
| City Of Boulder WWTF | Boulder | 0.08 |
| Town Of Eureka WWTP | Eureka | 0.08 |
| Chinook WWTP | Chinook | 0.07 |
| Park City County Wastewater Treatment Facility | Park City | 0.07 |
| Town Of Geraldine WWTF | Geraldine | 0.06 |
| Sun Prairie Village WWTP | Great Falls | 0.06 |
| White Sulphur Springs WWTF | White Sulphur Springs | 0.06 |
| Joliet WWTP | Joliet | 0.05 |
| City Of Thompson Falls WWTF | Thompson Falls | 0.04 |
| St. Ignatius-Southside | St. Ignatius | 0.04 |
| Town Of Culbertson Domestic WWTF | Culbertson | 0.04 |
| Bridger WWTP | Bridger | 0.03 |
| Superior Wastewater Treatment Facility | Superior | 0.03 |
| Vaughn WWTF | Vaughn | 0.03 |
| Woodcock Home Addition (e) | Pablo | 0.03 |
| Alberton WWTP | Alberton | 0.02 |
| Town Of Valier WWTF | Valier | 0.02 |
| Yellow Bay WWTP | Polson | 0.01 |
| Kootenai Lodge Lake County Water And Sewer Dist | Bigfork | 0.01 |
| Lodge Grass, Town Of WWTF | Lodge Grass | 0 |
| Fromberg Wastewater Treatment Facility | Fromberg | 0 |
| Ekalaka WWTF | Ekalaka | 0 |
| Wolf Creek WWTF | Wolf Creek | 0 |
| Agency Lagoon | Box Elder | — |
| Azure Lagoon | Box Elder | — |
| Brady County Water Sewer District | Brady | — |
| City Of Baker WWTF | Baker | — |
| Crow Agency Lagoon | Crow Agency | — |
| Fort Benton WWTP | Fort Benton | — |
| Highwood WWTP | Highwood | — |
| Hobson Sewage Treatment Plant | Hobson | — |
| Lower Dry Fork Lagoon | Box Elder | — |
| Malta Sewage Treatment Lagoons | Malta | — |
| Multi-Community Lagoon | Box Elder | — |
| Stockett Water And Sewer District Domestic Wastewater Treatment Facility | Stockett | — |
| Sunburst WWTF | Sunburst | — |
| Sweet Grass WWTF | Sweet Grass | — |
| Town Of Belt - WWTP | Belt | — |
| Town Of Chester WWTF | Chester | — |
| Town Of Denton WWTP | Denton | — |
| Town Of Fairfield WWTP | Fairfield | — |
| Town Of Fort Peck WWTF | Fort Peck | — |
| Town Of Jordan Wastewater Treatmetn Facility | Jordan | — |
| Town Of Kevin WWTF | Kevin | — |
| Town Of Lavina WWTF | Lavina | — |
| Town Of Nashua WWTF | Nashua | — |
| Town Of Saco | Saco | — |
| Twin Bridges WWTF | Twin Bridges | — |
| Willow Creek Wastewater Treatment Plant | Willow Creek | — |
| Wolf Point, City Of | Wolf Point | — |
