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 |
|---|---|---|---|---|
| 2025-05-27 | GULFPORT APPALACHIA, LLC - TRUAX | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-05-27 | GULFPORT APPALACHIA, LLC - MORRIS PAD | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-05-27 | GULFPORT APPALACHIA, LLC - MORRIS PAD | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-05-27 | GULFPORT APPALACHIA, LLC - MORRIS PAD | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-05-24 | THE GOODYEAR TIRE & RUBBER COMPANY | FINDLAY, Hancock, OH | Pass | State |
| 2025-05-24 | THE GOODYEAR TIRE & RUBBER COMPANY | FINDLAY, Hancock, OH | Pass | State |
| 2025-05-23 | GULFPORT APPALACHIA, LLC - LAKE VII PAD | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-05-23 | GULFPORT APPALACHIA, LLC - LAKE VII PAD | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-05-23 | GULFPORT APPALACHIA, LLC - LAKE VII PAD | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-05-22 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2025-05-21 | SOFIDEL AMERICA — high-priority violation on file | CIRCLEVILLE, Pickaway, OH | Pass | State |
| 2025-05-21 | SOFIDEL AMERICA — high-priority violation on file | CIRCLEVILLE, Pickaway, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-21 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-05-20 | HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY | COLUMBIANA, Columbiana, OH | Pass | State |
| 2025-05-20 | HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY | COLUMBIANA, Columbiana, OH | Pass | State |
| 2025-05-20 | HILCORP ENERGY - FAIRFIELD-UNKEFER PRODUCTION FACILITY | COLUMBIANA, Columbiana, OH | Pass | State |
| 2025-05-20 | ASCENT RESOURCES - UTICA LLC - STELLA MDS GR | LORE CITY, Guernsey, OH | Pass | State |
| 2025-05-20 | ASCENT RESOURCES - UTICA LLC - STELLA MDS GR | LORE CITY, Guernsey, OH | Pass | State |
| 2025-05-20 | INR OHIO, LLC - BETTINGER WELL PAD | CALDWELL, Noble, OH | Pass | State |
| 2025-05-20 | INR OHIO, LLC - BETTINGER WELL PAD | CALDWELL, Noble, OH | Pass | State |
| 2025-05-20 | INR OHIO, LLC - BETTINGER WELL PAD | CALDWELL, Noble, OH | Pass | State |
| 2025-05-20 | ALTIVIA PETROCHEMICALS, LLC | HAVERHILL, Scioto, OH | Pass | State |
| 2025-05-16 | WALLEYE POWER, LLC, BAY SHORE PLANT | OREGON, Lucas, OH | Pass | State |
| 2025-05-15 | ROVER PIPELINE - DEFIANCE COMPRESSOR STATION | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-15 | ROVER PIPELINE - DEFIANCE COMPRESSOR STATION | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-15 | ASCENT RESOURCES - UTICA LLC - JENNINGS WLS GR | LORE CITY, Guernsey, OH | Pass | State |
| 2025-05-15 | EOG RESOURCES, INC. - KRAMER 1-13-7 PAD | CADIZ, Harrison, OH | Pass | State |
| 2025-05-15 | EOG RESOURCES, INC. - KRAMER 1-13-7 PAD | CADIZ, Harrison, OH | Pass | State |
| 2025-05-14 | FISHER CAST STEEL | WEST JEFFERSON, Madison, OH | Pass | State |
| 2025-05-14 | ROVER PIPELINE - DEFIANCE COMPRESSOR STATION | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-14 | ROVER PIPELINE - DEFIANCE COMPRESSOR STATION | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-14 | EOG RESOURCES, INC. - STRIPED BASS GY CEN PAD | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2025-05-14 | EOG RESOURCES, INC. - STRIPED BASS GY CEN PAD | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2025-05-14 | WILLIAMS - SALEM COMPRESSOR STATION | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-05-14 | WILLIAMS - SALEM COMPRESSOR STATION | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-05-14 | WILLIAMS - SALEM COMPRESSOR STATION | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-05-14 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2025-05-13 | EOG RESOURCES, INC. - KRANTZ CR MON PAD | SHERRODSVILLE, Carroll, OH | Pass | State |
| 2025-05-13 | EOG RESOURCES, INC. - KRANTZ CR MON PAD | SHERRODSVILLE, Carroll, OH | Pass | State |
| 2025-05-13 | EOG RESOURCES, INC. - KRANTZ CR MON PAD | SHERRODSVILLE, Carroll, OH | Pass | State |
| 2025-05-13 | NOBLE ROAD LANDFILL | SHILOH, Richland, OH | Pass | State |
| 2025-05-13 | NOBLE ROAD LANDFILL | SHILOH, Richland, OH | Fail | State |
| 2025-05-13 | NOBLE ROAD LANDFILL | SHILOH, Richland, OH | Pass | State |
| 2025-05-13 | NOBLE ROAD LANDFILL | SHILOH, Richland, OH | Pass | State |
| 2025-05-13 | NOBLE ROAD LANDFILL | SHILOH, Richland, OH | Pass | State |
| 2025-05-13 | NOBLE ROAD LANDFILL | SHILOH, Richland, OH | Fail | State |
| 2025-05-13 | ASCENT RESOURCES - UTICA LLC - SEABRIGHT CLR BL | BRIDGEPORT, Belmont, OH | Pass | State |
| 2025-05-13 | ASCENT RESOURCES - UTICA LLC - SEABRIGHT CLR BL | BRIDGEPORT, Belmont, OH | Pass | State |
| 2025-05-13 | ASCENT RESOURCES - UTICA LLC - SEABRIGHT CLR BL | BRIDGEPORT, Belmont, OH | Pass | State |
| 2025-05-13 | EOG RESOURCES, INC. - SHC ENTERPRISES 32-13-6 PAD | BOWERSTON, Harrison, OH | Pass | State |
| 2025-05-13 | EOG RESOURCES, INC. - SHC ENTERPRISES 32-13-6 PAD | BOWERSTON, Harrison, OH | Pass | State |
| 2025-05-13 | EOG RESOURCES, INC. - SHC ENTERPRISES 32-13-6 PAD | BOWERSTON, Harrison, OH | Pass | State |
| 2025-05-12 | BUCKINGHAM ENTERPRISES 2 | GREENVILLE, Darke, OH | Pass | State |
| 2025-05-09 | GULFPORT APPALACHIA, LLC - KAGE PAD | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-05-09 | GULFPORT APPALACHIA, LLC - KAGE PAD | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-05-09 | GULFPORT APPALACHIA, LLC - KAGE PAD | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-05-08 | LIMA REFINING COMPANY — high-priority violation on file | LIMA, Allen, OH | Pass | State |
| 2025-05-08 | MEDINA COMPRESSOR STATION | MEDINA, Medina, OH | Pass | State |
| 2025-05-06 | EASTERN GAS TRANSMISSION AND STORAGE, INC. | WASHINGTON COURT HOUSE, Fayette, OH | Pass | State |
| 2025-05-06 | EASTERN GAS TRANSMISSION AND STORAGE, INC. | WASHINGTON COURT HOUSE, Fayette, OH | Pass | State |
| 2025-05-06 | LIMA REFINING COMPANY — high-priority violation on file | LIMA, Allen, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-05-06 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Fail | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.