EPA Air · stack tests by county and year
Air-emissions stack tests in Marathon County, Wisconsin, 2026
- 12Stack 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 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 Marathon County facility page.
Marathon County, Wisconsin, 2026
Air-emissions stack tests in Marathon County, other years
Air-emissions stack tests recorded in Marathon County, Wisconsin, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-15 | CRYSTAL FINISHING SYSTEMS INC | Pass | State |
| 2026-06-30 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2026-06-29 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2026-06-24 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2026-06-23 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2026-06-23 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2026-06-22 | WI PUBLIC SERVICE WESTON POWER PLANT | Pass | State |
| 2026-06-16 | APOGEE WAUSAU GROUP INC LINETEC DIVISION — high-priority violation on file | Pass | State |
| 2026-06-09 | WISCONSIN ELECTRIC POWER COMPANY (DBA WE ENERGIES) - ROTHSCHILD BIOMASS COGENERA — high-priority violation on file | Pass | State |
| 2026-04-07 | AHLSTROM MOSINEE, LLC — high-priority violation on file | Pass | State |
| 2026-03-16 | AHLSTROM MOSINEE, LLC — high-priority violation on file | Pass | State |
| 2026-02-11 | CRYSTAL FINISHING SYSTEMS INC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.