101 facilities in Montana operate under the Clean Air Act. Of those, 5 have one or more quarters of noncompliance on record, and EPA has assessed $1.6M in lifetime penalties.
| Facility | City | Quarters NC | Penalties |
|---|---|---|---|
| Schnitzer Steel Billings | Billings | 0 | $1.6M |
| Calumet Montana Refining (Cmr), Llc | Great Falls | 12 | $0 |
| Weyerhaeuser Nr- Columbia Falls | Columbia Falls | 12 | $0 |
| Yellowstone Energy Power Plant | Billings | 12 | $0 |
| Western Sugar Cooperative | Billings | 12 | $0 |
| Weyerhaeuser-Evergreen | Kalispell | 1 | $0 |