EPA Air · stack tests by state and year
Air-emissions stack tests in Ohio, 2025
- 2,213Stack 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 Ohio 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 Ohio, 2025
- Monroe County 233
- Belmont County 210
- Lucas County 209
- Harrison County 199
- Carroll County 138
- Jefferson County 121
- Guernsey County 95
- Noble County 84
- Montgomery County 68
- Defiance County 65
- Franklin County 61
- Hamilton County 58
- Medina County 43
- Undetermined County 42
- Butler County 34
- Putnam County 34
- Stark County 33
- Lorain County 31
- Columbiana County 27
- Wood County 26
- Cuyahoga County 25
- Trumbull County 24
- Mahoning County 23
- Perry County 23
- Marion County 20
- Tuscarawas County 20
- Fairfield County 18
- Licking County 17
- Crawford County 16
- Greene County 15
- Union County 15
- Ashtabula County 14
- Darke County 12
- Washington County 12
- Williams County 12
- Allen County 11
- Wayne County 10
- Brown County 9
- Miami County 9
- Summit County 9
- Warren County 8
- Richland County 7
- Clark County 6
- Huron County 6
- Athens County 5
- Muskingum County 5
- Erie County 5
- Van Wert County 4
- Hancock County 4
- Delaware County 3
- Shelby County 3
- Portage County 3
- Coshocton County 3
- Lake County 3
- Jackson County 3
Ohio, other years
Air-emissions stack tests recorded in Ohio, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-07-16 | ASCENT RESOURCES - UTICA LLC - RUTH MTP JF | ADENA, Jefferson, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-16 | DOMINION EAST OHIO - SWITZERLAND COMPRESSOR STATION | SWITZERLAND, TOWNSHIP OF, Monroe, OH | Pass | State |
| 2025-07-15 | STONECO PLANT #117 | CELINA, Mercer, OH | Pass | State |
| 2025-07-15 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-07-15 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-07-15 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-07-15 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-07-15 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-07-15 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-07-15 | ASCENT RESOURCES - UTICA LLC - POL PES BL | PEASE, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-07-15 | ASCENT RESOURCES - UTICA LLC - POL PES BL | PEASE, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-07-15 | ASCENT RESOURCES - UTICA LLC - POL PES BL | PEASE, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-07-15 | ASCENT RESOURCES - UTICA LLC - AMBER WEL JF | RAYLAND, Jefferson, OH | Pass | State |
| 2025-07-15 | ASCENT RESOURCES - UTICA LLC - AMBER WEL JF | RAYLAND, Jefferson, OH | Pass | State |
| 2025-07-15 | ASCENT RESOURCES - UTICA LLC - AMBER WEL JF | RAYLAND, Jefferson, OH | Pass | State |
| 2025-07-15 | DORN COLOR, LLC | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2025-07-14 | ROVER PIPELINE - CLARINGTON COMPRESSOR STATION | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-14 | ROVER PIPELINE - CLARINGTON COMPRESSOR STATION | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-14 | ROVER PIPELINE - CLARINGTON COMPRESSOR STATION | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-14 | ROVER PIPELINE - CLARINGTON COMPRESSOR STATION | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-14 | ROVER PIPELINE - CLARINGTON COMPRESSOR STATION | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-14 | ROVER PIPELINE - CLARINGTON COMPRESSOR STATION | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-08 | KOKOSING MATERIALS INC. - PLANT #501 | MANSFIELD, Richland, OH | Pass | State |
| 2025-07-08 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #2 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-07-08 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #2 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-07-08 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #2 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-07-03 | SEAFORTH MINERAL & ORE CO INC | EAST LIVERPOOL, Columbiana, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-03 | BOLEN PAD 952350 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-03 | BOLEN PAD 952350 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-03 | BOLEN PAD 952350 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-03 | BOLEN PAD 952350 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-03 | BOLEN PAD 952350 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-03 | BOLEN PAD 952350 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-02 | EOG RESOURCES, INC. - BLACKBIRD COMPRESSOR STATION | BROWN, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2025-07-02 | EOG RESOURCES, INC. - BLACKBIRD COMPRESSOR STATION | BROWN, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2025-07-02 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-02 | NUCOR STEEL MARION, INC. | MARION, Marion, OH | Pass | State |
| 2025-07-02 | PYLES PAD 952757 | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-02 | PYLES PAD 952757 | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-02 | PYLES PAD 952757 | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-07-02 | YELLOW ROSE PAD 953034 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-02 | YELLOW ROSE PAD 953034 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-02 | YELLOW ROSE PAD 953034 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-02 | LES RENEWABLE NG LLC - PIKE RNG | WAVERLY, Pike, OH | Pass | State |
| 2025-07-01 | JAM BEST ONE | TOLEDO, Lucas, OH | Pass | State |
| 2025-07-01 | ROLLAND PAD 952787 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-01 | ROLLAND PAD 952787 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-01 | ROLLAND PAD 952787 | SARDIS, Monroe, OH | Pass | State |
| 2025-07-01 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-01 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-01 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-06-30 | DUANE WEISEND PAD 952440 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-06-30 | DUANE WEISEND PAD 952440 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-06-30 | DUANE WEISEND PAD 952440 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-06-27 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-06-27 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-06-26 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-06-26 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-06-25 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-06-25 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-06-24 | STRAWSER MATERIALS - HARMON PLANT — high-priority violation on file | COLUMBUS, Franklin, OH | Pass | State |
| 2025-06-24 | STRAWSER MATERIALS - HARMON PLANT — high-priority violation on file | COLUMBUS, Franklin, OH | Pass | State |
| 2025-06-24 | MID AMERICAN SALT | TOLEDO, Lucas, OH | Fail | State |
| 2025-06-20 | VALLEY ASPHALT #17 - PORTABLE | CLEVES, Hamilton, OH | Pass | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Fail | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Fail | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Fail | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
| 2025-06-19 | WIELAND CHASE LLC — high-priority violation on file | MONTPELIER, Williams, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.