EPA Air · stack tests by state and year

Air-emissions stack tests in Indiana, 2025

1,619Stack 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 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.

Counties in Indiana, 2025

Indiana, other years

Air-emissions stack tests recorded in Indiana, 2025

Date	Facility	Where	Kind	Agency
2025-01-15	GXO	LEBANON, Boone, IN	Pass	State
2025-01-15	GXO	LEBANON, Boone, IN	Pass	State
2025-01-15	BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file	WHITING, Lake, IN	Pass	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Fail	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-10	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-09	BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file	WHITING, Lake, IN	Pass	State
2025-01-09	BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file	WHITING, Lake, IN	Pass	State
2025-01-09	BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file	WHITING, Lake, IN	Pass	State
2025-01-09	BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file	WHITING, Lake, IN	Pass	State
2025-01-08	AKZO NOBEL COATINGS INC	WARSAW, Kosciusko, IN	Pass	State
2025-01-07	OAK RIDGE RECYCLING & DISPOSAL FACILITY	LOGANSPORT, Cass, IN	Pass	State
2025-01-07	JAY COUNTY LANDFILL LLC	PORTLAND, Jay, IN	Pass	State
2025-01-03	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State
2025-01-03	MIDWEST AEROSPACE LLC — high-priority violation on file	MERRILLVILLE, Lake, IN	Pass	State

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