Montana hosts 19 Superfund cleanup sites, 67 facilities reporting to EPA's Toxic Release Inventory, and 161 facilities currently in significant noncompliance with federal environmental laws. EPA has assessed $60.7M in lifetime penalties across these facilities, and TRI reporters released roughly 40.8M pounds of regulated chemicals on-site in the latest reporting year. The single largest on-site releaser is Continental Pit in Butte, reporting 31.7M lb to EPA.
| Site | City | Status |
|---|---|---|
| Acm Smelter And Refinery | Black Eagle | Cleanup underway |
| Anaconda Aluminum Co Columbia Falls Reduction Plant | Columbia Falls | Listed on NPL |
| Anaconda Co Smelter | Anaconda | Cleanup underway |
| Barker Hughesville Mining District | Monarch | Listed on NPL |
| Basin Mining Area | Basin | Cleanup underway |
| Billings Pce | Billings | Listed on NPL |
| Carpenter Snow Creek Mining District | Neihart | Cleanup underway |
| East Helena Site | East Helena | Cleanup underway |
| Flat Creek Imm | Superior | Cleanup underway |
| Idaho Pole Co | Bozeman | Ready for anticipated reuse |
| Libby Asbestos Site | Libby | Cleanup underway |
| Libby Ground Water Contamination | Libby | Construction complete |
| Lockwood Solvent Ground Water Plume | Billings | Cleanup underway |
| Milltown Reservoir Sediments | Milltown | Cleanup underway |
| Montana Pole And Treating | Butte | Construction complete |
| Mouat Industries | Columbus | Ready for anticipated reuse |
| Silver Bow Creek Butte Area | Butte | Superfund site |
| Smurfit Stone Mill Frenchtown | Missoula | Proposed for NPL |
| Upper Tenmile Creek Mining Area | Helena | Cleanup underway |