EPA Air · stack tests by state and year

Air-emissions stack tests in Nebraska, 2026

51Stack 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 Nebraska 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 Nebraska, 2026

Nebraska, other years

Air-emissions stack tests recorded in Nebraska, 2026

Date	Facility	Where	Kind	Agency
2026-08-06	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-07-29	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-07-28	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-07-20	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-07-16	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-07-15	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-07-08	WHELAN ENERGY CENTER — high-priority violation on file	HASTINGS, Adams, NE	N/A	State
2026-07-08	ASH GROVE CEMENT CO — high-priority violation on file	LOUISVILLE, Cass, NE	N/A	State
2026-07-07	CARGILL INC — high-priority violation on file	BLAIR, Washington, NE	N/A	State
2026-06-09	DOUGLAS COUNTY RDF	BENNINGTON, Douglas, NE	N/A	State
2026-06-02	KAAPA PARTNERS AURORA LLC — high-priority violation on file	AURORA, Hamilton, NE	Pass	State
2026-05-26	REDTAIL COMPRESSOR STATION	BUSHNELL, Kimball, NE	Pass	State
2026-05-20	CIE NORFOLK GNS LLC — high-priority violation on file	NORFOLK, Madison, NE	Pass	State
2026-05-12	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-05-11	SIOUXLAND ETHANOL LLC — high-priority violation on file	JACKSON, Dakota, NE	Pass	State
2026-05-06	CHIEF ETHANOL FUELS INC	HASTINGS, Adams, NE	N/A	State
2026-04-29	SWIFT BEEF COMPANY — high-priority violation on file	GRAND ISLAND, Hall, NE	N/A	State
2026-04-28	AGP SOY PROCESSING — high-priority violation on file	HASTINGS, Adams, NE	N/A	State
2026-04-28	BERTRAND COMPRESSOR STATION	LOOMIS, Phelps, NE	Pass	State
2026-04-23	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-04-21	KAAPA ETHANOL RAVENNA LLC — high-priority violation on file	RAVENNA, Buffalo, NE	Pass	State
2026-04-15	TIGT BIG SPRINGS STATION	BIG SPRINGS, Deuel, NE	Pass	State
2026-04-15	NORTHERN NATURAL GAS COMPANY	FREMONT, Dodge, NE	Pass	State
2026-04-14	NORTHERN NATURAL GAS COMPANY	FREMONT, Dodge, NE	N/A	State
2026-04-14	REDTAIL COMPRESSOR STATION	BUSHNELL, Kimball, NE	Pass	State
2026-03-26	GREEN PLAINS YORK LLC — high-priority violation on file	YORK, York, NE	N/A	State
2026-03-24	GREEN PLAINS YORK LLC — high-priority violation on file	YORK, York, NE	Fail	State
2026-03-23	GREEN PLAINS WOOD RIVER LLC — high-priority violation on file	WOOD RIVER, Hall, NE	Pass	State
2026-03-20	WESTWOOD SOLUTIONS LLC	OMAHA, Douglas, NE	Pass	State
2026-03-20	WESTWOOD SOLUTIONS LLC	OMAHA, Douglas, NE	Pass	State
2026-03-19	CARGILL LACTIC ACID PLANT	BLAIR, Washington, NE	N/A	State
2026-03-19	CARGILL LACTIC ACID PLANT	BLAIR, Washington, NE	Pass	State
2026-03-18	GREEN PLAINS WOOD RIVER LLC — high-priority violation on file	WOOD RIVER, Hall, NE	N/A	State
2026-03-12	HIGH PLAINS CARBON CAPTURE LLC	COLUMBUS, Platte, NE	Pass	State
2026-03-09	TIGT BIG SPRINGS STATION	BIG SPRINGS, Deuel, NE	Pass	State
2026-02-25	ACEC - AURORA COOPERATIVE WEST	AURORA, Hamilton, NE	Pass	State
2026-02-25	OPPD NEBRASKA CITY STATION	NEBRASKA CITY, Otoe, NE	Pass	State
2026-02-25	NPPD SHELDON STATION	HALLAM, Lancaster, NE	Pass	Local
2026-02-19	HUSKER AG LLC	PLAINVIEW, Pierce, NE	Pass	State
2026-02-17	NATURALLY RECYCLED PROTEINS — high-priority violation on file	WAKEFIELD, Dixon, NE	Pass	State
2026-02-05	AG PROCESSING INC — high-priority violation on file	DAVID CITY, Butler, NE	Fail	State
2026-01-28	AG PROCESSING INC — high-priority violation on file	DAVID CITY, Butler, NE	N/A	State
2026-01-27	KIMBALL MUNICIPAL POWER PLANT — high-priority violation on file	KIMBALL, Kimball, NE	Pass	State
2026-01-25	GREEN PLAINS CENTRAL CITY LLC — high-priority violation on file	CENTRAL CITY, Merrick, NE	Pass	State
2026-01-22	GREEN PLAINS CENTRAL CITY LLC — high-priority violation on file	CENTRAL CITY, Merrick, NE	N/A	State
2026-01-20	AG PROCESSING INC — high-priority violation on file	DAVID CITY, Butler, NE	Fail	State
2026-01-15	NORTHERN NATURAL GAS COMPANY	BEATRICE, Gage, NE	Pass	State
2026-01-14	NORTHERN NATURAL GAS COMPANY	BEATRICE, Gage, NE	Pass	State
2026-01-14	CARGILL INC — high-priority violation on file	BLAIR, Washington, NE	Pass	State
2026-01-14	CARGILL INC — high-priority violation on file	BLAIR, Washington, NE	Pass	State
2026-01-07	UNION PACIFIC RAILROAD — high-priority violation on file	NORTH PLATTE, Lincoln, NE	N/A	State

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