8 facilities in Montana reported releasing a combined 44.6k pounds of propylene to air, water, and land in 2024.
| Facility | City | On-site (lb) |
|---|---|---|
| Calumet Montana Refining Llc. | Great Falls | 15.8k |
| Chs Inc. Laurel Refinery | Laurel | 10.9k |
| Phillips 66 Co Billings Refinery | Billings | 9.2k |
| Par Montana Billings Refinery | Billings | 5.3k |
| Stillwater Mining Co East Boulder Mine | Big Timber | 2.1k |
| Smc Nye Mine Site | Nye | 1.3k |
| Chs Nutrition - Circle | Circle | 0 |
| Cityservicevalcon Llc South Plant Bulk Facility | Kalispell | 0 |
← All Propylene releases nationwide · Montana pollution overview