EPA Air · stack tests by state and year
Air-emissions stack tests in Wisconsin, 2025
- 245Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Wisconsin during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Wisconsin, 2025
- Monroe County 25
- Marathon County 22
- Rusk County 14
- Douglas County 14
- Dane County 13
- Taylor County 12
- Brown County 12
- Columbia County 9
- Ozaukee County 8
- Barron County 7
- Fond du Lac County 7
- Manitowoc County 6
- La Crosse County 6
- Outagamie County 6
- Waushara County 6
- Jefferson County 5
- Marinette County 5
- Kenosha County 4
- Juneau County 4
- Green County 4
- Buffalo County 4
- Waupaca County 3
- Wood County 3
- Menominee County 3
- Winnebago County 3
- Richland County 3
- Dunn County 3
- Ashland County 3
- Calumet County 3
- Kewaunee County 3
Wisconsin, other years
Air-emissions stack tests recorded in Wisconsin, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-04-03 | WMWI - OMEGA HILLS LANDFILL | GERMANTOWN, Waukesha, WI | Pass | State |
| 2025-04-02 | ARDAGH GLASS INC — high-priority violation on file | BURLINGTON, Richland, WI | Pass | State |
| 2025-04-01 | WPL-SOUTH FOND DU LAC COMBUSTION TURBINE SITE | FOND DU LAC, Fond du Lac, WI | Pass | State |
| 2025-03-27 | WAUPACA FOUNDRY INC - PLANT 1 | WAUPACA, Waushara, WI | Pass | State |
| 2025-03-27 | WAUPACA FOUNDRY INC - PLANT 2 & 3 | WAUPACA, Waushara, WI | Pass | State |
| 2025-03-25 | DOMTAR PAPER CO LLC | ROTHSCHILD, Marathon, WI | Pass | State |
| 2025-03-24 | UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file | FRIESLAND, Columbia, WI | Fail | State |
| 2025-03-21 | QUAD/GRAPHICS INC - HARTFORD | HARTFORD, Dodge, WI | Pass | State |
| 2025-03-18 | ACE ETHANOL, LLC | STANLEY, Chippewa, WI | Pass | State |
| 2025-03-18 | WASTE MANAGEMENT OF WISCONSIN, INC. - PHEASANT RUN RECYCLING AND DISPOSAL FACILI | BRISTOL, Kenosha, WI | Pass | State |
| 2025-03-18 | THE TRANE COMPANY - MAIN COMPLEX | LA CROSSE, La Crosse, WI | Pass | State |
| 2025-03-13 | UNITED ENERGY NECEDAH LLC — high-priority violation on file | NECEDAH, Juneau, WI | Pass | State |
| 2025-03-12 | XCEL ENERGY - FRENCH ISLAND GENERATING PLANT | LA CROSSE, La Crosse, WI | Pass | State |
| 2025-03-11 | BROWNTOWN FOUNDRY LLC — high-priority violation on file | BROWNTOWN, Green, WI | Pass | State |
| 2025-03-10 | AHLSTROM MOSINEE, LLC — high-priority violation on file | MOSINEE, Marathon, WI | Pass | State |
| 2025-03-06 | GRAYMONT WESTERN LIME - EDEN | EDEN, Fond du Lac, WI | Pass | State |
| 2025-03-06 | RICHLAND CENTER RENEWABLE ENERGY | RICHLAND CENTER, Rock, WI | Pass | State |
| 2025-03-04 | AHLSTROM STEVENS POINT LLC — high-priority violation on file | STEVENS POINT, Price, WI | Pass | State |
| 2025-02-27 | XCEL ENERGY BAY FRONT GENERATING STATION | ASHLAND, Ashland, WI | Pass | State |
| 2025-02-24 | AHLSTROM NA SPECIALTY SOLUTIONS LLC — high-priority violation on file | KAUKAUNA, Ozaukee, WI | Pass | State |
| 2025-02-21 | BADGER STATE ETHANOL, INC. — high-priority violation on file | MONROE, Green, WI | Pass | State |
| 2025-02-21 | MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file | SAINT FRANCIS, Monroe, WI | Pass | U.S. EPA |
| 2025-02-20 | GREEN MEADOWS RNG, LLC | CHILTON, Calumet, WI | Pass | State |
| 2025-02-18 | MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file | SAINT FRANCIS, Monroe, WI | Fail | State |
| 2025-02-17 | BIG RIVER RESOURCES BOYCEVILLE LLC | BOYCEVILLE, Dunn, WI | Pass | State |
| 2025-02-12 | GRAYMONT (WI) LLC — high-priority violation on file | SUPERIOR, Douglas, WI | Pass | State |
| 2025-02-11 | ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER | PARDEEVILLE, Columbia, WI | Pass | State |
| 2025-02-11 | FML | BELOIT, Rusk, WI | N/A | State |
| 2025-02-10 | UW MADISON CHARTER STREET HEATING PLANT (DOA) | MADISON, Dane, WI | Pass | State |
| 2025-02-10 | WI DOA / UW-MADISON WALNUT ST PLT | MADISON, Dane, WI | Pass | State |
| 2025-02-04 | BIG RIVER RESOURCES BOYCEVILLE LLC | BOYCEVILLE, Dunn, WI | Pass | State |
| 2025-02-04 | KOHLER CO - METALS PROCESSING COMPLEX | KOHLER, Taylor, WI | Pass | State |
| 2025-02-03 | GREEN BAY METRO SEWERAGE DIST | GREEN BAY, Brown, WI | Pass | State |
| 2025-01-29 | SUPERIOR REFINING COMPANY LLC — high-priority violation on file | SUPERIOR, Douglas, WI | Pass | State |
| 2025-01-29 | SUPERIOR REFINING COMPANY LLC — high-priority violation on file | SUPERIOR, Douglas, WI | Pass | State |
| 2025-01-28 | SUPERIOR REFINING COMPANY LLC — high-priority violation on file | SUPERIOR, Douglas, WI | Pass | State |
| 2025-01-28 | DAYBREAK FOODS COLDSPRING LOCATION | PALMYRA, Jefferson, WI | Fail | State |
| 2025-01-28 | ANR PIPELINE CO - GOODMAN COMPRESSOR STATION | GOODMAN, Marinette, WI | Pass | State |
| 2025-01-28 | QUAD/GRAPHICS INC | SUSSEX, Waupaca, WI | Pass | State |
| 2025-01-24 | UNITED ETHANOL LLC | MILTON, Rusk, WI | Pass | State |
| 2025-01-14 | WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file | OAK CREEK, Monroe, WI | Pass | State |
| 2025-01-14 | WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file | OAK CREEK, Monroe, WI | Pass | State |
| 2025-01-14 | KERRY INC — high-priority violation on file | RHINELANDER, Outagamie, WI | Pass | State |
| 2025-01-13 | MANITOWOC PUBLIC UTILITIES | MANITOWOC, Manitowoc, WI | Pass | State |
| 2025-01-08 | UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file | FRIESLAND, Columbia, WI | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.