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
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	DAIRYLAND BIOGAS - AGRA RNG-GTL PROJECT — high-priority violation on file	NEW FRANKEN, Brown, WI	Earliest FRV determination	State
2026-04-29	COATING PLACE LLC — high-priority violation on file	VERONA, Dane, WI	Earliest FRV determination	State
2026-04-29	COATING PLACE LLC — high-priority violation on file	VERONA, Dane, WI	Earliest FRV determination	State
2026-04-23	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-04-22	AMCOR WISCONSIN, LLC - BOSCOBEL — high-priority violation on file	BOSCOBEL, Grant, WI	Earliest FRV determination	State
2026-04-22	AMCOR WISCONSIN, LLC - BOSCOBEL — high-priority violation on file	BOSCOBEL, Grant, WI	Earliest FRV determination	State
2026-04-16	SMART SAND INC — high-priority violation on file	OAKDALE, Oconto, WI	Earliest FRV determination	State
2026-04-09	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	Earliest FRV determination	State
2026-04-08	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-04-08	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-04-08	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-04-08	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-04-08	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-04-08	ADVANCED COATING, INC. — high-priority violation on file	OSHKOSH, Wood, WI	Earliest FRV determination	State
2026-04-08	ADVANCED COATING, INC. — high-priority violation on file	OSHKOSH, Wood, WI	Earliest FRV determination	State
2026-03-24	CNH INDUSTRIAL RACINE PLANT — high-priority violation on file	MOUNT PLEASANT, Richland, WI	Earliest FRV determination	State
2026-03-24	CNH INDUSTRIAL RACINE PLANT — high-priority violation on file	MOUNT PLEASANT, Richland, WI	Earliest FRV determination	State
2026-03-24	CNH INDUSTRIAL RACINE PLANT — high-priority violation on file	MOUNT PLEASANT, Richland, WI	Earliest FRV determination	State
2026-03-24	CNH INDUSTRIAL RACINE PLANT — high-priority violation on file	MOUNT PLEASANT, Richland, WI	Earliest FRV determination	State
2026-03-23	ROCKGEN ENERGY CENTER — high-priority violation on file	CAMBRIDGE, Dane, WI	Earliest FRV determination	State
2026-03-23	ROCKGEN ENERGY CENTER — high-priority violation on file	CAMBRIDGE, Dane, WI	Earliest FRV determination	State
2026-03-19	AMCOR PACKAGING INC, - LANCASTER — high-priority violation on file	LANCASTER, Grant, WI	HPV day-zero determination	State
2026-03-19	AMCOR PACKAGING INC, - LANCASTER — high-priority violation on file	LANCASTER, Grant, WI	HPV day-zero determination	State
2026-03-19	SMART SAND INC — high-priority violation on file	OAKDALE, Oconto, WI	Earliest FRV determination	State
2026-03-16	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-03-10	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	HPV day-zero determination	State
2026-03-10	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	HPV day-zero determination	State
2026-03-10	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	Earliest FRV determination	State
2026-03-10	MID-AMERICA STEEL DRUM COMPANY-CLCM — high-priority violation on file	SAINT FRANCIS, Monroe, WI	Earliest FRV determination	State
2026-03-10	PIERCE MFG INC — high-priority violation on file	APPLETON, Wood, WI	Earliest FRV determination	State
2026-03-10	PIERCE MFG INC — high-priority violation on file	APPLETON, Wood, WI	Earliest FRV determination	State
2026-03-05	PPG INDUSTRIES — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-03-05	PPG INDUSTRIES — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-03-05	PPG INDUSTRIES — high-priority violation on file	OAK CREEK, Monroe, WI	HPV day-zero determination	State
2026-03-05	PPG INDUSTRIES — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-03-05	PPG INDUSTRIES — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-03-05	PPG INDUSTRIES — high-priority violation on file	OAK CREEK, Monroe, WI	Earliest FRV determination	State
2026-03-03	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-03-03	PROAMPAC MENASHA — high-priority violation on file	MENASHA, Wood, WI	Earliest FRV determination	State
2026-03-03	PROAMPAC MENASHA — high-priority violation on file	MENASHA, Wood, WI	Earliest FRV determination	State
2026-03-02	GREDE LLC - LIBERTY — high-priority violation on file	WAUWATOSA, Monroe, WI	Earliest FRV determination	State
2026-03-02	GREDE LLC - LIBERTY — high-priority violation on file	WAUWATOSA, Monroe, WI	Earliest FRV determination	State
2026-02-24	UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file	FRIESLAND, Columbia, WI	Earliest FRV determination	State
2026-02-24	UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file	FRIESLAND, Columbia, WI	Earliest FRV determination	State
2026-02-24	UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file	FRIESLAND, Columbia, WI	Earliest FRV determination	State
2026-02-24	UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file	FRIESLAND, Columbia, WI	Earliest FRV determination	State
2026-02-24	BRIESS INDUSTRIES INC — high-priority violation on file	MANITOWOC, Manitowoc, WI	HPV day-zero determination	State
2026-02-24	BRIESS INDUSTRIES INC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-24	BRIESS INDUSTRIES INC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-24	BRIESS INDUSTRIES INC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-24	BRIESS INDUSTRIES INC — high-priority violation on file	MANITOWOC, Manitowoc, WI	HPV day-zero determination	State
2026-02-24	BRIESS INDUSTRIES INC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-23	CARFAIR COMPOSITES USA INC — high-priority violation on file	GILLETT, Oneida, WI	Earliest FRV determination	State
2026-02-23	CARFAIR COMPOSITES USA INC — high-priority violation on file	GILLETT, Oneida, WI	Earliest FRV determination	State
2026-02-23	CARFAIR COMPOSITES USA INC — high-priority violation on file	GILLETT, Oneida, WI	Earliest FRV determination	State
2026-02-23	CARFAIR COMPOSITES USA INC — high-priority violation on file	GILLETT, Oneida, WI	Earliest FRV determination	State
2026-02-17	RUBI HOLDING COMPANY, LLC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-17	RUBI HOLDING COMPANY, LLC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-17	RUBI HOLDING COMPANY, LLC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-17	RUBI HOLDING COMPANY, LLC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-17	RUBI HOLDING COMPANY, LLC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-17	RUBI HOLDING COMPANY, LLC — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-16	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-02-16	VIRESCO TURTLE LAKE — high-priority violation on file	TURTLE LAKE, Barron, WI	Earliest FRV determination	State
2026-02-13	WISCONSIN ALUMINUM FOUNDRY — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-13	WISCONSIN ALUMINUM FOUNDRY — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-13	WISCONSIN ALUMINUM FOUNDRY — high-priority violation on file	MANITOWOC, Manitowoc, WI	Earliest FRV determination	State
2026-02-13	MATALCO WISCONSIN LLC	WISCONSIN RAPIDS, Menominee, WI	HPV day-zero determination	State
2026-02-13	MATALCO WISCONSIN LLC	WISCONSIN RAPIDS, Menominee, WI	HPV day-zero determination	State
2026-02-12	EATON COOPER POWER SYSTEMS LLC — high-priority violation on file	WAUKESHA, Waupaca, WI	Earliest FRV determination	State
2026-02-12	EATON COOPER POWER SYSTEMS LLC — high-priority violation on file	WAUKESHA, Waupaca, WI	Earliest FRV determination	State
2026-02-11	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-02-11	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-02-11	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-02-11	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-02-09	DOMTAR AW LLC — high-priority violation on file	NEKOOSA, Menominee, WI	Earliest FRV determination	State
2026-02-06	3M - MENOMONIE PLANT — high-priority violation on file	MENOMONIE, Dunn, WI	Earliest FRV determination	State
2026-02-06	3M - MENOMONIE PLANT — high-priority violation on file	MENOMONIE, Dunn, WI	Earliest FRV determination	State
2026-02-06	MATALCO WISCONSIN LLC	WISCONSIN RAPIDS, Menominee, WI	Earliest FRV determination	State
2026-02-06	MATALCO WISCONSIN LLC	WISCONSIN RAPIDS, Menominee, WI	Earliest FRV determination	State
2026-02-05	AMCOR PACKAGING INC, - LANCASTER — high-priority violation on file	LANCASTER, Grant, WI	Earliest FRV determination	State
2026-02-05	AMCOR PACKAGING INC, - LANCASTER — high-priority violation on file	LANCASTER, Grant, WI	Earliest FRV determination	State
2026-02-03	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-02-03	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-02-03	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-02-03	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-02-03	SUPERIOR REFINING COMPANY LLC — high-priority violation on file	SUPERIOR, Douglas, WI	Earliest FRV determination	State
2026-01-30	BROAN NUTONE LLC — high-priority violation on file	HARTFORD, Waukesha, WI	Earliest FRV determination	State
2026-01-30	BROAN NUTONE LLC — high-priority violation on file	HARTFORD, Waukesha, WI	Earliest FRV determination	State
2026-01-30	BROAN NUTONE LLC — high-priority violation on file	HARTFORD, Waukesha, WI	Earliest FRV determination	State
2026-01-30	WPL - NEENAH GENERATING FACILITY — high-priority violation on file	NEENAH, Winnebago, WI	Earliest FRV determination	State
2026-01-30	WPL - NEENAH GENERATING FACILITY — high-priority violation on file	NEENAH, Winnebago, WI	Earliest FRV determination	State
2026-01-27	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State
2026-01-26	SHEBOYGAN PAINT CO. — high-priority violation on file	SHEBOYGAN, Sheboygan, WI	Earliest FRV determination	State

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