EPA Air · stack tests by county and year
Air-emissions stack tests in Lake County, Minnesota, 2025
- 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 Lake 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 Lake County facility page.
Air-emissions stack tests in Lake County, other years
Air-emissions stack tests recorded in Lake County, Minnesota, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-02 | LOUISIANA-PACIFIC CORP - TWO HARBORS | Pass | State |
| 2025-10-28 | NORTHSHORE MINING CO - SILVER BAY | Pass | State |
| 2025-07-22 | NORTHSHORE MINING CO - SILVER BAY | Pass | State |
| 2025-03-20 | NORTHSHORE MINING CO - SILVER BAY | 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 Lake county, MN, for 2025. Stack tests recorded in 2025: 4.