EPA Air · stack tests by county and year
Air-emissions stack tests in Glacier County, Montana, 2023
- 11Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Glacier County, Montana during 2023. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Glacier County facility page.
Air-emissions stack tests in Glacier County, other years
Air-emissions stack tests recorded in Glacier County, Montana, 2023
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2023-11-09 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-11-09 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-11-09 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-11-09 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-11-09 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-05-08 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-05-08 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-05-08 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-05-08 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-05-08 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
| 2023-05-08 | NORTHWESTERN ENERGY MAINLINE #1 | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Glacier county, MT, in 2023. It lists 11 stack tests recorded in 2023.