EPA Air · by county
Air-emissions sources in Fallon County, Montana
- 5Facilities
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Every stationary source in Fallon 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 Fallon County
Each of the 5 operating major, synthetic minor and minor sources in Fallon County, Montana has a record page: every source in Fallon County, A to Z.
By emissions classification in Fallon 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.
Stack tests in Fallon County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 9
- 2025 stack tests 13
- 2024 stack tests 6
- 2023 stack tests 7
- 2022 stack tests 8
- 2021 stack tests 12
- 2020 stack tests 21
- 2019 stack tests 19
- 2018 stack tests 32
- 2017 stack tests 25
Stack tests in Fallon County, year by year
Other counties in Montana
Every county in the state with at least three sources on file.
- Big Horn County 4
- Cascade County 12
- Custer County 3
- 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 |
|---|---|---|
| WBI SANDSTONE CREEK COMPRESSOR STATION | Minor source | No |
| WILLISTON BASIN - BAKER COMPRESSOR STA | Major source | No |
| WILLISTON BASIN - CABIN CREEK | Major source | No |
| WILLISTON BASIN - LITTLE BEAVER | Major source | No |
| WILLISTON BASIN - MONARCH STATION | Synthetic minor source | No |
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register for Fallon county, MT. It lists 5 facilities in Fallon county and 3 major sources.