EPA Air · stack tests by county and year
Air-emissions stack tests in Marquette County, Michigan, 2025
- 6Stack 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 Marquette County, Michigan during 2025. 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 Marquette County facility page.
Marquette County, Michigan, 2025
Air-emissions stack tests in Marquette County, other years
Air-emissions stack tests recorded in Marquette County, Michigan, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-18 | UPPER MICHIGAN ENERGY RESOURCES -F.D. KUESTER G.S. | Pass | State |
| 2025-10-23 | MARQUETTE BOARD OF LIGHT AND POWER | Pass | State |
| 2025-10-02 | UPPER MICHIGAN ENERGY RESOURCES -F.D. KUESTER G.S. | Pass | State |
| 2025-07-31 | TILDEN MINING COMPANY LC | Pass | State |
| 2025-07-09 | TILDEN MINING COMPANY LC | Pass | State |
| 2025-05-21 | TILDEN MINING COMPANY LC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.