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
2026-02-10	DUKE ENERGY INDIANA LLC - GIBSON GENERATING STATION	OWENSVILLE, Gibson, IN	Pass	State
2026-02-10	IROQUOIS BIO ENERGY COMPANY LLC — high-priority violation on file	RENSSELAER, Jasper, IN	Fail	State
2026-02-10	IROQUOIS BIO ENERGY COMPANY LLC — high-priority violation on file	RENSSELAER, Jasper, IN	Fail	State
2026-02-10	IROQUOIS BIO ENERGY COMPANY LLC — high-priority violation on file	RENSSELAER, Jasper, IN	Pass	State
2026-02-10	MIDWESTERN PET FOODS	EVANSVILLE, Vanderburgh, IN	Pass	State
2026-02-10	MIDWESTERN PET FOODS	EVANSVILLE, Vanderburgh, IN	Pass	State
2026-02-10	MIDWESTERN PET FOODS	EVANSVILLE, Vanderburgh, IN	Pass	State
2026-02-10	MIDWESTERN PET FOODS	EVANSVILLE, Vanderburgh, IN	Fail	State
2026-02-06	PURDUE UNIVERSITY — high-priority violation on file	WEST LAFAYETTE, Tippecanoe, IN	Pass	State
2026-02-06	PURDUE UNIVERSITY — high-priority violation on file	WEST LAFAYETTE, Tippecanoe, IN	Pass	State
2026-02-06	PURDUE UNIVERSITY — high-priority violation on file	WEST LAFAYETTE, Tippecanoe, IN	Pass	State
2026-02-06	PURDUE UNIVERSITY — high-priority violation on file	WEST LAFAYETTE, Tippecanoe, IN	Pass	State
2026-02-06	PURDUE UNIVERSITY — high-priority violation on file	WEST LAFAYETTE, Tippecanoe, 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
2026-02-04	HAYNES INTERNATIONAL INC — high-priority violation on file	KOKOMO, Howard, IN	Pass	State
2026-02-04	GEORGIA PACIFIC GYPSUM LLC — high-priority violation on file	WHEATFIELD, Jasper, IN	Pass	State
2026-02-04	GEORGIA PACIFIC GYPSUM LLC — high-priority violation on file	WHEATFIELD, Jasper, IN	Pass	State
2026-02-04	GEORGIA PACIFIC GYPSUM LLC — high-priority violation on file	WHEATFIELD, Jasper, IN	Pass	State
2026-02-04	GEORGIA PACIFIC GYPSUM LLC — high-priority violation on file	WHEATFIELD, Jasper, IN	Pass	State
2026-02-04	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Pass	State
2026-02-03	TEXAS EASTERN TRANSMISSION LP — high-priority violation on file	JONESBORO, Grant, IN	Pass	State
2026-02-03	TEXAS EASTERN TRANSMISSION LP — high-priority violation on file	JONESBORO, Grant, IN	Pass	State
2026-02-03	TEXAS EASTERN TRANSMISSION LP — high-priority violation on file	JONESBORO, Grant, IN	Pass	State
2026-02-03	TEXAS EASTERN TRANSMISSION LP — high-priority violation on file	JONESBORO, Grant, IN	Pass	State
2026-02-02	ALCOA POWER GENERATING INC WARRICK POWER PLANT — high-priority violation on file	NEWBURGH, Warrick, IN	Pass	State
2026-02-02	KAISER ALUMINUM WARRICK LLC — high-priority violation on file	NEWBURGH, Warrick, IN	Pass	State
2026-02-02	KAISER ALUMINUM WARRICK LLC — high-priority violation on file	NEWBURGH, Warrick, IN	Pass	State
2026-01-29	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, IN	Pass	State
2026-01-29	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, IN	Pass	State
2026-01-29	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, IN	Pass	State
2026-01-29	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, IN	Pass	State
2026-01-29	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, IN	Pass	State
2026-01-28	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, IN	Pass	State
2026-01-28	VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT	BLUFFTON, Wells, 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
2026-01-26	METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file	AUBURN, DeKalb, IN	Pass	State
2026-01-23	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-23	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-23	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-23	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-23	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Fail	State
2026-01-23	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-22	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-22	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-22	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-22	ZIMMER BIOMET INC. — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-01-22	ZIMMER BIOMET INC. — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-01-22	ZIMMER BIOMET INC. — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-01-22	ZIMMER BIOMET INC. — high-priority violation on file	WARSAW, Kosciusko, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Fail	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-22	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-01-22	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-01-21	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-21	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-21	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-21	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-21	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-01-21	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-21	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-21	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-01-21	MONTPELIER GENERATING STATION LLC — high-priority violation on file	PONETO, Wells, IN	Pass	State
2026-01-20	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-20	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-20	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-20	WHITEWATER MILL LLC — high-priority violation on file	WEST HARRISON, Dearborn, IN	Pass	State
2026-01-20	CARGILL INC — high-priority violation on file	HAMMOND, Lake, IN	Pass	State
2026-01-20	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-20	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-16	LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC	CLAYPOOL, Kosciusko, IN	Pass	State
2026-01-16	LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC	CLAYPOOL, Kosciusko, IN	Pass	State
2026-01-16	LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC	CLAYPOOL, Kosciusko, IN	Pass	State
2026-01-16	LOUIS DREYFUS COMPANY AGRICULTURAL PRODUCTS LLC	CLAYPOOL, Kosciusko, IN	Pass	State
2026-01-16	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Fail	State
2026-01-16	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-16	SIGECO - FB CULLEY GENERATING STATION	NEWBURGH, Warrick, IN	Pass	State
2026-01-15	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-15	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-15	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-15	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-14	POET BIOREFINING - CLOVERDALE LLC — high-priority violation on file	CLOVERDALE, Putnam, IN	Pass	State
2026-01-14	POET BIOREFINING - CLOVERDALE LLC — high-priority violation on file	CLOVERDALE, Putnam, IN	Pass	State
2026-01-14	POET BIOREFINING - CLOVERDALE LLC — high-priority violation on file	CLOVERDALE, Putnam, IN	Pass	State
2026-01-14	POET BIOREFINING - CLOVERDALE LLC — high-priority violation on file	CLOVERDALE, Putnam, IN	Pass	State
2026-01-14	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-14	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-14	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-14	TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file	LAFAYETTE, Tippecanoe, IN	Pass	State
2026-01-13	EDCOAT LLC	NEW CARLISLE, St. Joseph, IN	Pass	State
2026-01-12	DUKE ENERGY INDIANA LLC - GIBSON GENERATING STATION	OWENSVILLE, Gibson, IN	Pass	State
2026-01-08	ROCKIES EXPRESS PIPELINE LLC - ST PAUL COMPRESSOR STATION	SAINT PAUL, Decatur, IN	Pass	State

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