EPA Air · by county
Air-emissions sources in Cascade County, Montana
- 12Facilities
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Every stationary source in Cascade County, Montana that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
Every source’s record in Cascade County
Each of the 12 operating major, synthetic minor and minor sources in Cascade County, Montana has a record page: every source in Cascade County, A to Z.
By emissions classification in Cascade County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
Inspections in Cascade County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
Violations in Cascade County, by year
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity.
Stack tests in Cascade County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 11
- 2025 stack tests 4
- 2023 stack tests 17
- 2022 stack tests 16
- 2021 stack tests 11
- 2020 stack tests 13
- 2019 stack tests 19
- 2018 stack tests 11
- 2017 stack tests 20
Inspections in Cascade County, year by year · Violations in Cascade County, year by year · Stack tests in Cascade County, year by year
Other counties in Montana
Every county in the state with at least three sources on file.
- Big Horn County 4
- Custer County 3
- Fallon County 5
- Flathead County 7
- Gallatin County 11
- Glacier County 5
- Jefferson County 3
- Lewis and Clark County 13
- Madison County 3
- Missoula County 18
- Powell County 3
- Richland County 4
- Roosevelt County 7
- Rosebud County 3
- Silver Bow County 3
- Stillwater County 5
- Toole County 4
- Yellowstone County 24
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| ADF INDUSTRIAL COATINGS | Synthetic minor source | No |
| ANDERSON STEEL SUPPLY INC. | Minor source | No |
| CALUMET MONTANA REFINING | Major source | Yes |
| GREAT FALLS RENEWABLE DIESEL PLANT | Major source | No |
| GREAT FALLS TERMINAL | Major source | No |
| JERRY'S RADIATOR & AIR CONDITIONING | Minor source | No |
| MALMSTROM AFB | Major source | No |
| MONTANA AIR NATIONAL GUARD | Synthetic minor source | No |
| MRL GREAT FALLS RENEWABLE FUELS PLANT | Major source | No |
| MT WASTE SYSTEMS - HIGH PLAINS LANDFILL | Major source | No |
| PACIFIC RECYCLING | Minor source | No |
| STEEL ETC | Minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.