EPA Air · stack tests by county and year
Air-emissions stack tests in Marathon County, Wisconsin, 2025
- 22Stack 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 Marathon County, Wisconsin 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 Marathon County facility page.
Marathon County, Wisconsin, 2025
Air-emissions stack tests in Marathon County, other years
Air-emissions stack tests recorded in Marathon County, Wisconsin, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-10-20 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-10-20 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-09-30 | WISCONSIN ELECTRIC POWER COMPANY (DBA WE ENERGIES) - ROTHSCHILD BIOMASS COGENERA — high-priority violation on file | Pass | State |
| 2025-09-15 | MULLINS CHEESE INC — high-priority violation on file | Pass | State |
| 2025-08-19 | BUCKHORN RNG, LLC | Pass | State |
| 2025-08-12 | WISCONSIN ELECTRIC POWER COMPANY (DBA WE ENERGIES) - ROTHSCHILD BIOMASS COGENERA — high-priority violation on file | Pass | State |
| 2025-07-22 | MARTH WOOD SHAVINGS SUPPLY INC — high-priority violation on file | Pass | State |
| 2025-07-14 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-07-14 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-07-14 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-07-14 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-07-10 | MULLINS CHEESE INC — high-priority violation on file | Pass | State |
| 2025-07-02 | CRYSTAL FINISHING SYSTEMS INC | Pass | State |
| 2025-06-02 | AHLSTROM MOSINEE, LLC — high-priority violation on file | Pass | State |
| 2025-05-12 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-05-12 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-05-12 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-05-12 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-05-12 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2025-05-08 | AHLSTROM MOSINEE, LLC — high-priority violation on file | Pass | State |
| 2025-03-25 | DOMTAR PAPER CO LLC | Pass | State |
| 2025-03-10 | AHLSTROM MOSINEE, LLC — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.