EPA Air · stack tests by county and year
Air-emissions stack tests in Carlton County, Minnesota, 2025
- 10Stack 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 Carlton County, Minnesota 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 Carlton County facility page.
Carlton County, Minnesota, 2025
Air-emissions stack tests in Carlton County, other years
Air-emissions stack tests recorded in Carlton County, Minnesota, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-02 | SAPPI CLOQUET LLC | Pass | State |
| 2025-10-14 | SAPPI CLOQUET LLC | Pass | State |
| 2025-08-12 | SAPPI CLOQUET LLC | Pass | State |
| 2025-08-05 | USG INTERIORS LLC - CLOQUET MN | Pass | State |
| 2025-07-15 | SAPPI CLOQUET LLC | Pass | State |
| 2025-07-07 | ULLAND BROTHERS INC | Pass | State |
| 2025-05-23 | SAPPI CLOQUET LLC | Pass | State |
| 2025-05-21 | SAPPI CLOQUET LLC | Pass | State |
| 2025-05-13 | SPECIALTY MINERALS INC - CLOQUET | Pass | State |
| 2025-04-15 | USG INTERIORS LLC - CLOQUET MN | Fail | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.