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.

What this page shows

This page covers Clean Air Act facilities in the EPA air register with violations in WI for 2026. It lists 222 violations recorded in 2026.