EPA Air · violations by state, industry and year

Mining and quarrying (NAICS 2123): violations in Wisconsin, 2026

17Violations

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. Each row is one violation recorded during 2026 at a Wisconsin source whose primary industry code is NAICS 2123. A facility filing more than one industry code is counted under the first one on its record.

Mining and quarrying (NAICS 2123) in Wisconsin, other years

Other industries in Wisconsin, 2026

High-priority air violations recorded in Wisconsin, 2026

Date	Facility	Where	Kind	Agency
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
2026-05-07	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	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	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
2026-04-16	SMART SAND INC — high-priority violation on file	OAKDALE, Oconto, WI	Earliest FRV determination	State
2026-03-19	SMART SAND INC — high-priority violation on file	OAKDALE, Oconto, 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
2026-01-27	3M CO WAUSAU PLT — high-priority violation on file	WAUSAU, Marathon, WI	Earliest FRV determination	State

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