EPA Air · stack tests by state, industry and year

Primary metal manufacturing (NAICS 3311): stack tests in Indiana, 2026

78Stack 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 Indiana source whose primary industry code is NAICS 3311. A facility filing more than one industry code is counted under the first one on its record.

Primary metal manufacturing (NAICS 3311) in Indiana, other years

Other industries in Indiana, 2026

Air-emissions stack tests recorded in Indiana, 2026

Date	Facility	Where	Kind	Agency
2026-07-08	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-07-08	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-07-08	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-07-07	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-07-07	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-07-07	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-06-24	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-24	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-24	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-23	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-23	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-23	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-18	SOUTH SHORE SLAG LLC CONTRACTOR OF US STEEL CORPORATION GARY	GARY, Lake, IN	Pass	State
2026-06-16	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-16	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-16	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-16	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-11	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-11	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-11	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-11	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-06-09	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-06-09	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-06-04	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-06-04	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-06-04	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-06-04	CLEVELAND-CLIFFS STEEL LLC	EAST CHICAGO, Lake, IN	Pass	State
2026-05-29	CLEVELAND CLIFFS NEW CARLISLE LLC — high-priority violation on file	NEW CARLISLE, St. Joseph, IN	Pass	State
2026-05-29	CLEVELAND CLIFFS NEW CARLISLE LLC — high-priority violation on file	NEW CARLISLE, St. Joseph, IN	Pass	State
2026-05-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-05-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-05-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-05-12	STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file	BUTLER, DeKalb, IN	Pass	State
2026-05-12	STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file	BUTLER, DeKalb, IN	Pass	State
2026-05-12	STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file	BUTLER, DeKalb, IN	Pass	State
2026-05-12	STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file	BUTLER, DeKalb, IN	Pass	State
2026-05-12	STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file	BUTLER, DeKalb, IN	Pass	State
2026-05-05	CLEVELAND-CLIFFS BURNS HARBOR LLC — high-priority violation on file	BURNS HARBOR, Porter, IN	Pass	State
2026-04-30	STEEL DYNAMICS, INC. STRUCTURAL & RAIL DIVISION — high-priority violation on file	COLUMBIA CITY, Whitley, IN	Pass	State
2026-04-29	STEEL DYNAMICS INCORPORATED ENGINEERED BAR PRODUCTS DIVISION — high-priority violation on file	PITTSBORO, Hendricks, IN	Pass	State
2026-04-29	STEEL DYNAMICS INCORPORATED ENGINEERED BAR PRODUCTS DIVISION — high-priority violation on file	PITTSBORO, Hendricks, IN	Pass	State
2026-04-29	STEEL DYNAMICS INCORPORATED ENGINEERED BAR PRODUCTS DIVISION — high-priority violation on file	PITTSBORO, Hendricks, IN	Pass	State
2026-04-28	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-28	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-28	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-28	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-11	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-11	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-11	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-11	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-08	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-08	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-08	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-08	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-07	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-04-07	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-04-07	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-04-07	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-07	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-07	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-04-07	NUCOR STEEL — high-priority violation on file	CRAWFORDSVILLE, Montgomery, IN	Pass	State
2026-03-25	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	CLEVELAND CLIFFS NEW CARLISLE LLC — high-priority violation on file	NEW CARLISLE, St. Joseph, IN	Pass	State
2026-03-25	CLEVELAND CLIFFS NEW CARLISLE LLC — high-priority violation on file	NEW CARLISLE, St. Joseph, IN	Pass	State
2026-03-24	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-02-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-02-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-02-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-02-28	NLMK INDIANA — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-02-18	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-02-18	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-02-05	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-02-05	CLEVELAND-CLIFFS STEEL LLC — high-priority violation on file	EAST CHICAGO, Lake, IN	Pass	State
2026-01-27	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-01-27	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-01-06	STEEL DYNAMICS, INC. STRUCTURAL & RAIL DIVISION — high-priority violation on file	COLUMBIA CITY, Whitley, IN	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.