EPA Air · stack tests by state, industry and year
Chemical manufacturing (NAICS 3251): stack tests in Montana, 2023
- 5Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2023 at a Montana source whose primary industry code is NAICS 3251. A facility filing more than one industry code is counted under the first one on its record.
Chemical manufacturing (NAICS 3251) in Montana, other years
- 2021 3
Other industries in Montana, 2023
- Utilities (NAICS 2211) 61
- Petroleum and coal products manufacturing (NAICS 3241) 53
- Pipeline transportation (NAICS 4862) 21
- Oil and gas extraction (NAICS 2111) 11
- Nonmetallic mineral product manufacturing (NAICS 3273) 6
- Wood product manufacturing (NAICS 3212) 6
- Primary metal manufacturing (NAICS 3314) 3
Air-emissions stack tests recorded in Montana, 2023
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2023-11-02 | MONTANA SULPHUR & CHEMICAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2023-08-15 | MONTANA SULPHUR & CHEMICAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2023-08-15 | MONTANA SULPHUR & CHEMICAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2023-08-15 | MONTANA SULPHUR & CHEMICAL | BILLINGS, Yellowstone, MT | Pass | State |
| 2023-01-25 | MONTANA SULPHUR & CHEMICAL | BILLINGS, Yellowstone, MT | Pass | State |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.