EPA Air · stack tests by county and year
Air-emissions stack tests in St. Louis County, Minnesota, 2026
- 4Stack 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 St. Louis County, Minnesota during 2026. 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 St. Louis County facility page.
St. Louis County, Minnesota, 2026
- Inspections 13
Air-emissions stack tests in St. Louis County, other years
Air-emissions stack tests recorded in St. Louis County, Minnesota, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-27 | ME GLOBAL INC | Pass | State |
| 2026-03-25 | MINNESOTA POWER - HIBBARD RENEWABLE ENERGY CENTER | Pass | State |
| 2026-03-18 | UNITED TACONITE LLC - FAIRLANE PLANT | Pass | State |
| 2026-03-05 | US STEEL CORP - MINNTAC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.