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
What stands out
- Stack tests in Carlton County, Minnesota, rose from 8 in 2024, the previous year on file, to 10 in 2025.
- The county’s file for stack tests holds 10 years of events, from 2017 through 2026.
- Its 10 stack tests rank 7th of the 26 county cells in Minnesota for 2025.
- Its 10 stack tests are 4.2% of the 238 the state’s file holds for 2025.
Every line is computed by formula from the state’s stored file; nothing is estimated.
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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register for Carlton county, MN, in 2025. It lists 10 stack tests recorded in 2025.