EPA Air · stack tests by state, industry and year

Utilities (NAICS 2211): stack tests in Wisconsin, 2026

51Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2026 at a Wisconsin source whose primary industry code is NAICS 2211. A facility filing more than one industry code is counted under the first one on its record.

Utilities (NAICS 2211) in Wisconsin, other years

Other industries in Wisconsin, 2026

Air-emissions stack tests recorded in Wisconsin, 2026

Date	Facility	Where	Kind	Agency
2026-07-21	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-13	WPL - NEENAH GENERATING FACILITY — high-priority violation on file	NEENAH, Winnebago, WI	Pass	State
2026-07-08	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-07	WPL - SHEBOYGAN FALLS ENERGY FACILITY	PLYMOUTH, Taylor, WI	Pass	State
2026-07-06	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-06	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-07-06	WE ENERGIES - VALLEY POWER PLANT	MILWAUKEE, Monroe, WI	Pass	State
2026-06-30	WI PUBLIC SERVICE WESTON POWER PLANT	KRONENWETTER, Marathon, WI	Pass	State
2026-06-29	WI PUBLIC SERVICE WESTON POWER PLANT	KRONENWETTER, Marathon, WI	Pass	State
2026-06-24	WI PUBLIC SERVICE WESTON POWER PLANT	KRONENWETTER, Marathon, WI	Pass	State
2026-06-24	WPL - EDGEWATER GENERATING STATION	SHEBOYGAN, Taylor, WI	Pass	State
2026-06-23	MG&AMP;E WEST CAMPUS COGENERATION FTY	MADISON, Dane, WI	Pass	State
2026-06-23	WI PUBLIC SERVICE WESTON POWER PLANT	KRONENWETTER, Marathon, WI	Pass	State
2026-06-23	WI PUBLIC SERVICE WESTON POWER PLANT	KRONENWETTER, Marathon, WI	Pass	State
2026-06-22	WI PUBLIC SERVICE WESTON POWER PLANT	KRONENWETTER, Marathon, WI	Pass	State
2026-06-22	WPL - EDGEWATER GENERATING STATION	SHEBOYGAN, Taylor, WI	Pass	State
2026-06-18	DAIRYLAND POWER COOP ALMA SITE	ALMA, Buffalo, WI	Pass	State
2026-06-16	DAIRYLAND POWER COOP ALMA SITE	ALMA, Buffalo, WI	Pass	State
2026-06-13	WISCONSIN ELECTRIC POWER COMPANY D/B/A WE ENERGIES-PARIS GENERATING STATION	UNION GROVE, Kenosha, WI	N/A	State
2026-06-10	WPL-SOUTH FOND DU LAC COMBUSTION TURBINE SITE	FOND DU LAC, Fond du Lac, WI	Pass	State
2026-06-09	WISCONSIN ELECTRIC POWER COMPANY (DBA WE ENERGIES) - ROTHSCHILD BIOMASS COGENERA — high-priority violation on file	ROTHSCHILD, Marathon, WI	Pass	State
2026-06-09	WISCONSIN PUBLIC SERVICE CORPORATION - F	KAUKAUNA, Outagamie, WI	Pass	State
2026-06-09	WISCONSIN PUBLIC SERVICE CORPORATION - F	KAUKAUNA, Outagamie, WI	Pass	State
2026-06-09	WPL - RIVERSIDE ENERGY CENTER	BELOIT, Rusk, WI	Pass	State
2026-06-09	WPL - RIVERSIDE ENERGY CENTER	BELOIT, Rusk, WI	Pass	State
2026-06-05	WE ENERGIES - WHITEWATER GENERATING STATION	WHITEWATER, Jefferson, WI	Pass	State
2026-05-27	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-05-26	MARSHFIELD UTILITIES COMBUSTION TURBINE	MARSHFIELD, Wood, WI	Pass	State
2026-05-19	WE ENERGIES PORT WASHINGTON GENERATING STATION	PORT WASHINGTON, Pepin, WI	Pass	State
2026-05-15	WPL - SHEBOYGAN FALLS ENERGY FACILITY	PLYMOUTH, Taylor, WI	Pass	State
2026-05-15	WPL - SHEBOYGAN FALLS ENERGY FACILITY	PLYMOUTH, Taylor, WI	Pass	State
2026-05-11	WPL - RIVERSIDE ENERGY CENTER	BELOIT, Rusk, WI	Pass	State
2026-05-04	WPL - NEENAH GENERATING FACILITY — high-priority violation on file	NEENAH, Winnebago, WI	Pass	State
2026-05-04	WPL - NEENAH GENERATING FACILITY — high-priority violation on file	NEENAH, Winnebago, WI	Pass	State
2026-04-21	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Pass	State
2026-04-14	ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER	PARDEEVILLE, Columbia, WI	Pass	State
2026-04-13	ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER	PARDEEVILLE, Columbia, WI	Pass	State
2026-04-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-04-13	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-04-13	WE ENERGIES - VALLEY POWER PLANT	MILWAUKEE, Monroe, WI	Pass	State
2026-04-07	ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER	PARDEEVILLE, Columbia, WI	Pass	State
2026-04-07	XCEL ENERGY - FRENCH ISLAND GENERATING PLANT	LA CROSSE, La Crosse, WI	Pass	State
2026-04-06	ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER	PARDEEVILLE, Columbia, WI	Pass	State
2026-02-10	NORTHERN STATES PWR CO WHEATON GEN STA	EAU CLAIRE, Chippewa, WI	Fail	State
2026-02-03	XCEL ENERGY - FRENCH ISLAND GENERATING PLANT	LA CROSSE, La Crosse, WI	Pass	State
2026-02-02	NORTHERN STATES PWR CO WHEATON GEN STA	EAU CLAIRE, Chippewa, WI	Pass	State
2026-01-20	ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER	PARDEEVILLE, Columbia, WI	Pass	State
2026-01-19	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State
2026-01-19	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Pass	State

Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.