EPA Air · violations by state and year

High-priority air violations in Wisconsin, 2026

222Violations

A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity. Every violation below was recorded against a source in Wisconsin during 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Wisconsin, 2026

Wisconsin, other years

High-priority air violations recorded in Wisconsin, 2026

Date	Facility	Where	Kind	Agency
2026-08-24	KERRY INC — high-priority violation on file	RHINELANDER, Outagamie, WI	Earliest FRV determination	State
2026-08-21	MULLINS CHEESE INC — high-priority violation on file	MOSINEE, Marathon, WI	Earliest FRV determination	State
2026-08-17	KERRY INC — high-priority violation on file	RHINELANDER, Outagamie, WI	Earliest FRV determination	State
2026-08-10	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-08-10	KERRY INC — high-priority violation on file	RHINELANDER, Outagamie, WI	Earliest FRV determination	State
2026-08-08	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-07-29	WISCONSIN PROPPANTS - ALMA CENTER PLANT — high-priority violation on file	HUMBIRD, Clark, WI	Earliest FRV determination	State
2026-07-29	WISCONSIN PROPPANTS - ALMA CENTER PLANT — high-priority violation on file	HUMBIRD, Clark, WI	Earliest FRV determination	State
2026-07-29	PATTISON SAND PRAIRIE DU CHIEN RAIL LOAD-OUT — high-priority violation on file	PRAIRIE DU CHIEN, Crawford, WI	Earliest FRV determination	State
2026-07-29	PATTISON SAND PRAIRIE DU CHIEN RAIL LOAD-OUT — high-priority violation on file	PRAIRIE DU CHIEN, Crawford, WI	Earliest FRV determination	State
2026-07-29	CALUMET RENEWABLE ENERGY - DAIRY DREAMS FACILITY — high-priority violation on file	CASCO, Kewaunee, WI	Earliest FRV determination	State
2026-07-29	CALUMET RENEWABLE ENERGY - DAIRY DREAMS FACILITY — high-priority violation on file	CASCO, Kewaunee, WI	Earliest FRV determination	State
2026-07-29	MCMILLAN ELECTRIC CO — high-priority violation on file	WOODVILLE, Sauk, WI	Earliest FRV determination	State
2026-07-29	MCMILLAN ELECTRIC CO — high-priority violation on file	WOODVILLE, Sauk, WI	Earliest FRV determination	State
2026-07-22	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-07-22	WE ENERGIES-OAK CREEK POWER PLANT — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-07-21	APPLETON GRP LLC — high-priority violation on file	SOUTH MILWAUKEE, Monroe, WI	Earliest FRV determination	State
2026-07-21	APPLETON GRP LLC — high-priority violation on file	SOUTH MILWAUKEE, Monroe, WI	Earliest FRV determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	HPV day-zero determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	HPV day-zero determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	Earliest FRV determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	HPV day-zero determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	HPV day-zero determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	Earliest FRV determination	State
2026-07-07	VORTEQ COIL FINISHERS — high-priority violation on file	OCONOMOWOC, Waupaca, WI	HPV day-zero determination	State
2026-07-01	CARMEUSE LIME AND STONE - ROCKWELL OPERATION — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-07-01	CARMEUSE LIME AND STONE - ROCKWELL OPERATION — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-07-01	WISCONSIN ALUMINUM FOUNDRY — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-07-01	WISCONSIN ALUMINUM FOUNDRY — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-07-01	WISCONSIN ALUMINUM FOUNDRY — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-06-25	ROCKGEN ENERGY CENTER — high-priority violation on file	CAMBRIDGE, Dane, WI	Earliest FRV determination	State
2026-06-25	ROCKGEN ENERGY CENTER — high-priority violation on file	CAMBRIDGE, Dane, WI	Earliest FRV determination	State
2026-06-15	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	Earliest FRV determination	State
2026-06-12	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-06-12	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-06-12	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-06-09	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-06-04	CRYSTAL FINISHING SYSTEMS INC - MOSINEE — high-priority violation on file	MOSINEE, Marathon, WI	Earliest FRV determination	State
2026-06-04	CRYSTAL FINISHING SYSTEMS INC - MOSINEE — high-priority violation on file	MOSINEE, Marathon, WI	Earliest FRV determination	State
2026-06-02	MARINETTE MARINE CORP — high-priority violation on file	MARINETTE, Marinette, WI	Earliest FRV determination	State
2026-06-02	MARINETTE MARINE CORP — high-priority violation on file	MARINETTE, Marinette, WI	Earliest FRV determination	State
2026-06-02	MARINETTE MARINE CORP — high-priority violation on file	MARINETTE, Marinette, WI	Earliest FRV determination	State
2026-06-02	MARINETTE MARINE CORP — high-priority violation on file	MARINETTE, Marinette, WI	Earliest FRV determination	State
2026-06-02	MARINETTE MARINE CORP — high-priority violation on file	MARINETTE, Marinette, WI	Earliest FRV determination	State
2026-05-29	RACINE WASTEWATER TREATMENT FACILITY — high-priority violation on file	RACINE, Richland, WI	Earliest FRV determination	State
2026-05-29	RACINE WASTEWATER TREATMENT FACILITY — high-priority violation on file	RACINE, Richland, WI	Earliest FRV determination	State
2026-05-29	RACINE WASTEWATER TREATMENT FACILITY — high-priority violation on file	RACINE, Richland, WI	Earliest FRV determination	State
2026-05-29	RACINE WASTEWATER TREATMENT FACILITY — high-priority violation on file	RACINE, Richland, WI	Earliest FRV determination	State
2026-05-29	RACINE WASTEWATER TREATMENT FACILITY — high-priority violation on file	RACINE, Richland, WI	Earliest FRV determination	State
2026-05-28	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-05-22	MULLINS CHEESE INC — high-priority violation on file	MOSINEE, Marathon, WI	Earliest FRV determination	State
2026-05-22	MULLINS CHEESE INC — high-priority violation on file	MOSINEE, Marathon, WI	Earliest FRV determination	State
2026-05-19	KERRY INC — high-priority violation on file	RHINELANDER, Outagamie, WI	Earliest FRV determination	State
2026-05-18	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-05-15	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-05-15	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-05-15	ARDAGH GLASS INC — high-priority violation on file	BURLINGTON, Richland, WI	Earliest FRV determination	State
2026-05-15	ARDAGH GLASS INC — high-priority violation on file	BURLINGTON, Richland, WI	Earliest FRV determination	State
2026-05-15	ARDAGH GLASS INC — high-priority violation on file	BURLINGTON, Richland, WI	Earliest FRV determination	State
2026-05-15	ARDAGH GLASS INC — high-priority violation on file	BURLINGTON, Richland, WI	Earliest FRV determination	State
2026-05-07	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-05-07	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-05-04	BLUE DIAMOND PROPPANTS - CLINTON PLANT — high-priority violation on file	BARRON, Barron, WI	Earliest FRV determination	State
2026-05-04	BLUE DIAMOND PROPPANTS - CLINTON PLANT — high-priority violation on file	BARRON, Barron, WI	Earliest FRV determination	State
2026-05-04	SANIMAX USA LLC — high-priority violation on file	GREEN BAY, Brown, WI	Earliest FRV determination	State
2026-05-04	SANIMAX USA LLC — high-priority violation on file	GREEN BAY, Brown, WI	Earliest FRV determination	State
2026-05-04	NICOLET HARDWOODS CORP — high-priority violation on file	LAONA, Forest, WI	Earliest FRV determination	State
2026-05-04	NICOLET HARDWOODS CORP — high-priority violation on file	LAONA, Forest, WI	Earliest FRV determination	State
2026-05-04	NICOLET HARDWOODS CORP — high-priority violation on file	LAONA, Forest, WI	Earliest FRV determination	State
2026-05-04	NICOLET HARDWOODS CORP — high-priority violation on file	LAONA, Forest, WI	Earliest FRV determination	State
2026-05-04	KERRY ROTHSCHILD — high-priority violation on file	ROTHSCHILD, Marathon, WI	Earliest FRV determination	State
2026-05-04	KERRY ROTHSCHILD — high-priority violation on file	ROTHSCHILD, Marathon, WI	Earliest FRV determination	State
2026-05-04	FULL CYCLE ENTERPRISES LLC — high-priority violation on file	OAK CREEK, Undetermined, WI	Earliest FRV determination	State
2026-05-04	FULL CYCLE ENTERPRISES LLC — high-priority violation on file	OAK CREEK, Undetermined, WI	Earliest FRV determination	State
2026-05-04	COVIA ENERGY LLC — high-priority violation on file	TOMAH, Oconto, WI	Earliest FRV determination	State
2026-05-04	COVIA ENERGY LLC — high-priority violation on file	TOMAH, Oconto, WI	Earliest FRV determination	State
2026-05-04	INX INTERNATIONAL INK CO — high-priority violation on file	APPLETON, Ozaukee, WI	Earliest FRV determination	State
2026-05-04	INX INTERNATIONAL INK CO — high-priority violation on file	APPLETON, Ozaukee, WI	Earliest FRV determination	State
2026-05-04	T J HALE COMPANY LLC — high-priority violation on file	MENOMONEE FALLS, Waupaca, WI	Earliest FRV determination	State
2026-05-04	T J HALE COMPANY LLC — high-priority violation on file	MENOMONEE FALLS, Waupaca, WI	Earliest FRV determination	State
2026-05-04	T J HALE COMPANY LLC — high-priority violation on file	MENOMONEE FALLS, Waupaca, WI	Earliest FRV determination	State
2026-05-04	T J HALE COMPANY LLC — high-priority violation on file	MENOMONEE FALLS, Waupaca, WI	Earliest FRV determination	State
2026-05-04	T J HALE COMPANY LLC — high-priority violation on file	MENOMONEE FALLS, Waupaca, WI	Earliest FRV determination	State
2026-05-04	T J HALE COMPANY LLC — high-priority violation on file	MENOMONEE FALLS, Waupaca, WI	Earliest FRV determination	State
2026-05-04	WHITEHAVEN SILICA, LLC — high-priority violation on file	READFIELD, Waushara, WI	Earliest FRV determination	State
2026-05-04	WHITEHAVEN SILICA, LLC — high-priority violation on file	READFIELD, Waushara, WI	Earliest FRV determination	State
2026-05-04	H &AMP; S MANUFACTURING COMPANY INC — high-priority violation on file	CLINTONVILLE, Waushara, WI	Earliest FRV determination	State
2026-05-04	H &AMP; S MANUFACTURING COMPANY INC — high-priority violation on file	CLINTONVILLE, Waushara, WI	Earliest FRV determination	State
2026-05-04	H &AMP; S MANUFACTURING COMPANY INC — high-priority violation on file	CLINTONVILLE, Waushara, WI	Earliest FRV determination	State
2026-05-04	H &AMP; S MANUFACTURING COMPANY INC — high-priority violation on file	CLINTONVILLE, Waushara, WI	Earliest FRV determination	State
2026-05-04	SENSORYEFFECTS POWDER SYSTEMS (FORMERLY — high-priority violation on file	CITY OF MARSHFIELD, Marathon, WI	Earliest FRV determination	State
2026-05-04	SENSORYEFFECTS POWDER SYSTEMS (FORMERLY — high-priority violation on file	CITY OF MARSHFIELD, Marathon, WI	Earliest FRV determination	State
2026-05-04	ND WQC LLC — high-priority violation on file	WISCONSIN RAPIDS, Menominee, WI	Earliest FRV determination	State
2026-05-04	ND WQC LLC — high-priority violation on file	WISCONSIN RAPIDS, Menominee, WI	Earliest FRV determination	State
2026-05-04	WEINBRENNER SHOE CO — high-priority violation on file	MARSHFIELD, Menominee, WI	Earliest FRV determination	State
2026-05-04	WEINBRENNER SHOE CO — high-priority violation on file	MARSHFIELD, Menominee, WI	Earliest FRV determination	State
2026-05-01	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	HPV day-zero determination	State
2026-05-01	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	HPV day-zero determination	State
2026-05-01	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	HPV day-zero determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State

Dates as filed by the agency that recorded the violation. Figures from EPA’s ICIS-AIR download.