EPA Air · stack tests by state and year
Air-emissions stack tests in Nebraska, 2025
- 145Stack 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 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Nebraska, 2025
- Lancaster County 20
- Cass County 12
- Washington County 12
- Douglas County 11
- Platte County 10
- Otoe County 8
- Hall County 7
- Fillmore County 6
- Sarpy County 5
- York County 5
- Dodge County 4
- Madison County 4
- Gage County 4
- Merrick County 3
- Lincoln County 3
- Buffalo County 3
- Dakota County 3
- Adams County 3
Nebraska, other years
Air-emissions stack tests recorded in Nebraska, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-18 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-12-16 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | N/A | State |
| 2025-12-16 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | Pass | State |
| 2025-12-11 | NORTHERN NATURAL GAS COMPANY | HOMER, Dakota, NE | Pass | State |
| 2025-12-11 | 3600 NORTH PLATTE COMPRESSOR | NORTH PLATTE, Lincoln, NE | Pass | State |
| 2025-12-10 | NORTHERN NATURAL GAS COMPANY | HOMER, Dakota, NE | N/A | State |
| 2025-11-19 | E ENERGY ADAMS LLC — high-priority violation on file | ADAMS, Gage, NE | Pass | State |
| 2025-11-18 | GREEN PLAINS CENTRAL CITY LLC — high-priority violation on file | CENTRAL CITY, Merrick, NE | Pass | State |
| 2025-11-12 | DARLING INGREDIENTS INC | BELLEVUE, Sarpy, NE | Pass | State |
| 2025-11-11 | OMAHA STEEL CASTINGS CO — high-priority violation on file | WAHOO, Saunders, NE | Pass | State |
| 2025-11-06 | OMAHA STEEL CASTINGS CO — high-priority violation on file | WAHOO, Saunders, NE | N/A | State |
| 2025-11-05 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | N/A | State |
| 2025-11-04 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | Pass | State |
| 2025-10-30 | FALLS CITY POWER PLANT — high-priority violation on file | FALLS CITY, Richardson, NE | Pass | State |
| 2025-09-25 | NEBRASKA CORN PROCESSING LLC — high-priority violation on file | CAMBRIDGE, Furnas, NE | N/A | State |
| 2025-09-25 | NEBRASKA CORN PROCESSING LLC — high-priority violation on file | CAMBRIDGE, Furnas, NE | Pass | State |
| 2025-09-25 | KAAPA ETHANOL LLC | MINDEN, Kearney, NE | Pass | State |
| 2025-09-25 | CARGILL INC POLYOL SWEETENERS | BLAIR, Washington, NE | Pass | State |
| 2025-09-24 | SIOUXLAND ETHANOL LLC — high-priority violation on file | JACKSON, Dakota, NE | N/A | State |
| 2025-09-24 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-09-23 | UNION PACIFIC RAILROAD — high-priority violation on file | NORTH PLATTE, Lincoln, NE | Pass | State |
| 2025-09-23 | MID AMERICA AGRI PRODUCTS | MADRID, Perkins, NE | N/A | State |
| 2025-09-23 | FIREBALL GROUP LLC DATA CENTER — high-priority violation on file | PAPILLION, Sarpy, NE | N/A | State |
| 2025-09-22 | FIREBALL GROUP LLC DATA CENTER — high-priority violation on file | PAPILLION, Sarpy, NE | Pass | State |
| 2025-09-17 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | N/A | State |
| 2025-09-16 | KAAPA ETHANOL RAVENNA LLC — high-priority violation on file | RAVENNA, Buffalo, NE | Pass | State |
| 2025-09-16 | KAAPA ETHANOL LLC | MINDEN, Kearney, NE | N/A | State |
| 2025-09-12 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | N/A | State |
| 2025-09-12 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-09-12 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-09-12 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-09-12 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | N/A | State |
| 2025-09-12 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-09-12 | GREENAMERICA BIOFUELS ORD LLC | ORD, Valley, NE | Pass | State |
| 2025-09-10 | GREENAMERICA BIOFUELS ORD LLC | ORD, Valley, NE | N/A | State |
| 2025-09-09 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-09-08 | BRIDGEPORT ETHANOL LLC | BRIDGEPORT, Morrill, NE | Pass | State |
| 2025-09-04 | LON D WRIGHT POWER PLANT | FREMONT, Dodge, NE | N/A | State |
| 2025-08-28 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-08-27 | GREEN PLAINS YORK LLC — high-priority violation on file | YORK, York, NE | Pass | State |
| 2025-08-26 | MUD RAINWOOD PUMP STATION | OMAHA, Douglas, NE | Pass | State |
| 2025-08-26 | GREEN PLAINS YORK LLC — high-priority violation on file | YORK, York, NE | N/A | State |
| 2025-08-26 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-08-22 | AGATE LLC | LINCOLN, Lancaster, NE | Pass | Local |
| 2025-08-21 | VALERO RENEWABLE FUELS COMPANY — high-priority violation on file | ALBION, Boone, NE | N/A | State |
| 2025-08-21 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | N/A | State |
| 2025-08-21 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | Fail | State |
| 2025-08-21 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-08-20 | GREEN PLAINS WOOD RIVER LLC — high-priority violation on file | WOOD RIVER, Hall, NE | Pass | State |
| 2025-08-20 | BD PHARMACEUTICAL SYSTEMS | COLUMBUS, Platte, NE | N/A | State |
| 2025-08-20 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | N/A | State |
| 2025-08-20 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-08-20 | AGATE LLC | LINCOLN, Lancaster, NE | Pass | Local |
| 2025-08-19 | VALERO RENEWABLE FUELS COMPANY — high-priority violation on file | ALBION, Boone, NE | N/A | State |
| 2025-08-19 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | Pass | State |
| 2025-08-13 | GREEN PLAINS CENTRAL CITY LLC — high-priority violation on file | CENTRAL CITY, Merrick, NE | N/A | State |
| 2025-08-13 | GREEN PLAINS CENTRAL CITY LLC — high-priority violation on file | CENTRAL CITY, Merrick, NE | Pass | State |
| 2025-08-13 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-08-12 | CARGILL INC POLYOL SWEETENERS | BLAIR, Washington, NE | Pass | State |
| 2025-08-08 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | Pass | State |
| 2025-08-07 | POET BIOREFINING-FAIRMONT LLC — high-priority violation on file | FAIRMONT, Fillmore, NE | N/A | State |
| 2025-08-07 | POET BIOREFINING-FAIRMONT LLC — high-priority violation on file | FAIRMONT, Fillmore, NE | Pass | State |
| 2025-08-06 | MUD SKYLINE PUMP STATION | ELKHORN, Douglas, NE | Pass | State |
| 2025-08-05 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | N/A | State |
| 2025-08-04 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | Pass | State |
| 2025-08-03 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-08-03 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-07-30 | CHIEF ETHANOL FUELS INC | HASTINGS, Adams, NE | Pass | State |
| 2025-07-29 | CHIEF ETHANOL FUELS INC | HASTINGS, Adams, NE | N/A | State |
| 2025-07-29 | ADM SOYBEAN OIL EXTRACTION PLANT | LINCOLN, Lancaster, NE | Pass | Local |
| 2025-07-28 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-07-23 | NPPD BEATRICE POWER STATION | BEATRICE, Gage, NE | N/A | State |
| 2025-07-22 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-07-21 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-07-17 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-07-16 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-07-10 | BEATRICE NITROGEN PLANT | BEATRICE, Gage, NE | N/A | State |
| 2025-07-10 | REDTAIL COMPRESSOR STATION | BUSHNELL, Kimball, NE | N/A | State |
| 2025-07-10 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-07-10 | LES ROKEBY PEAKING UNIT | LINCOLN, Lancaster, NE | Pass | Local |
| 2025-07-08 | WHELAN ENERGY CENTER — high-priority violation on file | HASTINGS, Adams, NE | N/A | State |
| 2025-07-08 | CARGILL INC — high-priority violation on file | BLAIR, Washington, NE | Pass | State |
| 2025-07-04 | KAAPA PARTNERS AURORA LLC — high-priority violation on file | AURORA, Hamilton, NE | Fail | State |
| 2025-06-25 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-06-25 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | Pass | State |
| 2025-06-18 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | N/A | State |
| 2025-06-18 | ASH GROVE CEMENT CO — high-priority violation on file | LOUISVILLE, Cass, NE | N/A | State |
| 2025-06-17 | PLATTE GENERATING STATION | GRAND ISLAND, Hall, NE | N/A | State |
| 2025-06-17 | PLATTE GENERATING STATION | GRAND ISLAND, Hall, NE | N/A | State |
| 2025-06-13 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | Pass | State |
| 2025-06-11 | LON D WRIGHT POWER PLANT | FREMONT, Dodge, NE | Pass | State |
| 2025-06-10 | LON D WRIGHT POWER PLANT | FREMONT, Dodge, NE | N/A | State |
| 2025-06-04 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-06-03 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | Pass | State |
| 2025-06-03 | ADM CORN PROCESSING — high-priority violation on file | COLUMBUS, Platte, NE | N/A | State |
| 2025-05-30 | CIE NORFOLK GNS LLC — high-priority violation on file | NORFOLK, Madison, NE | Pass | State |
| 2025-05-28 | WESTWOOD SOLUTIONS LLC | OMAHA, Douglas, NE | Pass | State |
| 2025-05-28 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2025-05-23 | WESTWOOD SOLUTIONS LLC | OMAHA, Douglas, NE | Pass | State |
| 2025-05-15 | REDTAIL COMPRESSOR STATION | BUSHNELL, Kimball, NE | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.