EPA Air · stack tests by state and year

Air-emissions stack tests in Indiana, 2026

1,010Stack tests

A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Indiana 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 Indiana, 2026

Indiana, other years

Air-emissions stack tests recorded in Indiana, 2026

Date	Facility	Where	Kind	Agency
2026-04-01	PVS TECHNOLOGIES INC — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-04-01	PVS TECHNOLOGIES INC — high-priority violation on file	PORTAGE, Porter, IN	Pass	State
2026-04-01	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-04-01	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-04-01	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-04-01	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	MULZER CRUSHED STONE INCORPORATED (CAPE SANDY) A CRH COMPANY	LEAVENWORTH, Crawford, IN	Pass	State
2026-03-31	TOPPAN PACKAGING USA INC — high-priority violation on file	EDINBURGH, Johnson, IN	Fail	State
2026-03-31	BUCKEYE TERMINALS LLC HAMMOND TERMINAL	HAMMOND, Lake, IN	Pass	State
2026-03-31	BUCKEYE TERMINALS LLC HAMMOND TERMINAL	HAMMOND, Lake, IN	Pass	State
2026-03-31	METALX LLC DBA METALX WABASH	WABASH, Wabash, IN	Pass	State
2026-03-31	METALX LLC DBA METALX WABASH	WABASH, Wabash, IN	Pass	State
2026-03-31	METALX LLC DBA METALX WABASH	WABASH, Wabash, IN	Pass	State
2026-03-31	METALX LLC DBA METALX WABASH	WABASH, Wabash, IN	Pass	State
2026-03-31	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-31	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-31	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-31	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-30	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-30	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-03-26	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Fail	State
2026-03-26	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-26	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-26	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-26	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-26	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-25	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-25	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	CARMEUSE LIME INCORPORATED — 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	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-25	BCI SOLUTIONS INCORPORATED	BREMEN, Marshall, 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
2026-03-25	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Fail	State
2026-03-25	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Fail	State
2026-03-25	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Fail	State
2026-03-25	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Pass	State
2026-03-24	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-24	ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file	FRANKFORT, Clinton, IN	Pass	State
2026-03-24	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-24	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-24	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-24	US STEEL CORPORATION GARY WORKS — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-24	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MITCHELL, Lawrence, IN	Pass	State
2026-03-24	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MITCHELL, Lawrence, IN	Pass	State
2026-03-24	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MITCHELL, Lawrence, IN	Pass	State
2026-03-24	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MITCHELL, Lawrence, IN	Pass	State
2026-03-24	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Fail	State
2026-03-24	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Pass	State
2026-03-23	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-23	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-20	SIGECO - FB CULLEY GENERATING STATION	NEWBURGH, Warrick, IN	Pass	State
2026-03-19	GRAIN PROCESSING CORPORATION — high-priority violation on file	WASHINGTON, Daviess, IN	Pass	State
2026-03-19	GRAIN PROCESSING CORPORATION — high-priority violation on file	WASHINGTON, Daviess, IN	Pass	State
2026-03-19	GRAIN PROCESSING CORPORATION — high-priority violation on file	WASHINGTON, Daviess, IN	Pass	State
2026-03-19	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-19	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-19	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-19	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-19	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-19	ROCHESTER METAL PRODUCTS CORPORATION — high-priority violation on file	ROCHESTER, Fulton, IN	Pass	State
2026-03-19	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-19	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-19	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-19	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-19	DALTON CORPORATION WARSAW MANUFACTURING FACILITY — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-03-19	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-19	CARMEUSE LIME INCORPORATED — high-priority violation on file	GARY, Lake, IN	Pass	State
2026-03-19	HAMMOND GROUP INCORPORATED	HAMMOND, Lake, IN	Pass	State
2026-03-19	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MITCHELL, Lawrence, IN	Pass	State
2026-03-19	HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file	MITCHELL, Lawrence, IN	Pass	State

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