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 |
|---|---|---|---|---|
| 2025-08-05 | PURECYCLE OHIO, LLC. | IRONTON, Lawrence, OH | Pass | State |
| 2025-08-01 | EOG RESOURCES, INC. - KOVACH 3-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-08-01 | EOG RESOURCES, INC. - KOVACH 3-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-08-01 | EOG RESOURCES, INC. - KOVACH 3-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-08-01 | EOG RESOURCES, INC. - BOWLING 23-16-6 PAD | MALVERN, Carroll, OH | Pass | State |
| 2025-08-01 | EOG RESOURCES, INC. - BOWLING 23-16-6 PAD | MALVERN, Carroll, OH | Pass | State |
| 2025-08-01 | EOG RESOURCES, INC. - BOWLING 23-16-6 PAD | MALVERN, Carroll, OH | Pass | State |
| 2025-07-31 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2025-07-31 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2025-07-31 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2025-07-30 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-07-30 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-07-30 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-07-30 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-07-30 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-07-30 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2025-07-30 | GULFPORT APPALACHIA LLC - MIKLOVIC PAD | FLUSHING, Belmont, OH | Pass | State |
| 2025-07-30 | GULFPORT APPALACHIA LLC - MIKLOVIC PAD | FLUSHING, Belmont, OH | Pass | State |
| 2025-07-30 | KINDER MORGANTENNESSEE GAS PIPELINE STATION 209 | CUMBERLAND, Guernsey, OH | Pass | State |
| 2025-07-30 | KINDER MORGANTENNESSEE GAS PIPELINE STATION 209 | CUMBERLAND, Guernsey, OH | Pass | State |
| 2025-07-30 | KINDER MORGANTENNESSEE GAS PIPELINE STATION 209 | CUMBERLAND, Guernsey, OH | Pass | State |
| 2025-07-30 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-07-30 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-07-30 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-07-29 | RICHLAND STRYKER GENERATION LLC | DEFIANCE, Defiance, OH | Pass | State |
| 2025-07-29 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Fail | State |
| 2025-07-29 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Fail | State |
| 2025-07-29 | KINDER MORGAN TENNESSEE GAS PIPELINE STATION 204 | ALBANY, Athens, OH | Pass | State |
| 2025-07-29 | KINDER MORGAN TENNESSEE GAS PIPELINE STATION 204 | ALBANY, Athens, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | INR MIDSTREAM, LLC - REUSSER | LEWISVILLE, Monroe, OH | Pass | State |
| 2025-07-29 | BUCKEYE TERMINALS, LLC - CLEVELAND PLANT | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2025-07-25 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-25 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-25 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-25 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-25 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-25 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | MARYSVILLE, Union, OH | Fail | State |
| 2025-07-24 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | MARYSVILLE, Union, OH | Pass | State |
| 2025-07-24 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | MARYSVILLE, Union, OH | Pass | State |
| 2025-07-24 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | EOG RESOURCES, INC. - SNYDER 19-15-6 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-07-24 | KOKOSING MATERIALS, INC. - PLANT 503 | LORAIN, Lorain, OH | Pass | State |
| 2025-07-24 | MID AMERICAN SALT | TOLEDO, Lucas, OH | Pass | State |
| 2025-07-23 | PEPPERIDGE FARM INC. | WILLARD, Huron, OH | Pass | State |
| 2025-07-23 | PEPPERIDGE FARM INC. | WILLARD, Huron, OH | Pass | State |
| 2025-07-22 | PEPPERIDGE FARM INC. | WILLARD, Huron, OH | Pass | State |
| 2025-07-22 | PEPPERIDGE FARM INC. | WILLARD, Huron, OH | Pass | State |
| 2025-07-22 | ASCENT RESOURCES - UTICA LLC - FLEAGANE PLT BL | BELLAIRE, Belmont, OH | Pass | State |
| 2025-07-22 | ASCENT RESOURCES - UTICA LLC - FLEAGANE PLT BL | BELLAIRE, Belmont, OH | Pass | State |
| 2025-07-22 | ASCENT RESOURCES - UTICA LLC - FLEAGANE PLT BL | BELLAIRE, Belmont, OH | Pass | State |
| 2025-07-22 | ASCENT RESOURCES - UTICA LLC - BLESSED RCH BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-07-22 | ASCENT RESOURCES - UTICA LLC - BLESSED RCH BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-07-22 | ASCENT RESOURCES - UTICA LLC - BLESSED RCH BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2025-07-22 | MAR ZANE PLANT NO 4 | HAYDENVILLE, Hocking, OH | Pass | State |
| 2025-07-22 | USALCO FAIRFIELD PLANT, LLC — high-priority violation on file | FAIRFIELD, Butler, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA, LLC - CROSS CREEK A | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA, LLC - CROSS CREEK A | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA, LLC - CROSS CREEK A | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - DICKSON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - DICKSON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - DICKSON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - MINGO CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - MINGO CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - MINGO CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-21 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-07-18 | FLEXTUR | DALTON, Wayne, OH | Pass | State |
| 2025-07-18 | FLEXTUR | DALTON, Wayne, OH | Pass | State |
| 2025-07-18 | FLEXTUR | DALTON, Wayne, OH | Pass | State |
| 2025-07-18 | NATIONAL LIME & STONE CO. - CAREY | CAREY, Wyandot, OH | Pass | State |
| 2025-07-18 | GULFPORT APPALACHIA LLC - MIKLOVIC PAD | FLUSHING, Belmont, OH | Pass | State |
| 2025-07-18 | GULFPORT APPALACHIA LLC - MIKLOVIC PAD | FLUSHING, Belmont, OH | Pass | State |
| 2025-07-18 | GULFPORT APPALACHIA LLC - MIKLOVIC PAD | FLUSHING, Belmont, OH | Pass | State |
| 2025-07-18 | GULFPORT APPALACHIA, LLC - SCHUMACHER WELL PAD | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-18 | GULFPORT APPALACHIA, LLC - SCHUMACHER WELL PAD | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-18 | GULFPORT APPALACHIA, LLC - SCHUMACHER WELL PAD | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-07-17 | MSC WALBRIDGE COATINGS INC — high-priority violation on file | WALBRIDGE, Wood, OH | Pass | State |
| 2025-07-17 | MSC WALBRIDGE COATINGS INC — high-priority violation on file | WALBRIDGE, Wood, OH | Pass | State |
| 2025-07-17 | MSC WALBRIDGE COATINGS INC — high-priority violation on file | WALBRIDGE, Wood, OH | Pass | State |
| 2025-07-17 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2025-07-17 | ENBRIDGE - SUMMERFIELD COMPRESSOR STATION | CALDWELL, Noble, OH | Pass | State |
| 2025-07-17 | ENBRIDGE - SUMMERFIELD COMPRESSOR STATION | CALDWELL, Noble, OH | Pass | State |
| 2025-07-17 | ENBRIDGE - SUMMERFIELD COMPRESSOR STATION | CALDWELL, Noble, OH | Pass | State |
| 2025-07-16 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2025-07-16 | ASCENT RESOURCES - UTICA LLC - RUTH MTP JF | ADENA, Jefferson, OH | Pass | State |
| 2025-07-16 | ASCENT RESOURCES - UTICA LLC - RUTH MTP JF | ADENA, Jefferson, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.