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 |
|---|---|---|---|---|
| 2025-02-04 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2025-02-04 | CITY OF AKRON STEAM GENERATING | AKRON, Summit, OH | Pass | State |
| 2025-02-04 | CITY OF AKRON STEAM GENERATING | AKRON, Summit, OH | Pass | State |
| 2025-02-03 | CITY OF AKRON STEAM GENERATING | AKRON, Summit, OH | Pass | State |
| 2025-01-31 | EOG RESOURCES, INC. - WHITACRE | MALVERN, Carroll, OH | Pass | State |
| 2025-01-31 | EOG RESOURCES, INC. - WHITACRE | MALVERN, Carroll, OH | Pass | State |
| 2025-01-31 | EOG RESOURCES, INC. - WHITACRE | MALVERN, Carroll, OH | Pass | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Fail | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Fail | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Fail | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-29 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-29 | PARKER TRUTEC | SPRINGFIELD, Clark, OH | Pass | State |
| 2025-01-29 | PARKER TRUTEC | SPRINGFIELD, Clark, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | SHERWIN-WILLIAMS COMPANY | COLUMBUS, Franklin, OH | Pass | State |
| 2025-01-28 | EQUITRANS LP - PLASMA COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-01-28 | PARKER TRUTEC | SPRINGFIELD, Clark, OH | Pass | State |
| 2025-01-28 | EASTERN GAS TRANSMISSION AND STORAGE - LEBANON STATION | LEBANON, Warren, OH | Pass | State |
| 2025-01-28 | EASTERN GAS TRANSMISSION AND STORAGE - LEBANON STATION | LEBANON, Warren, OH | Pass | State |
| 2025-01-23 | FCA US LLC - TOLEDO NORTH ASSEMBLY | TOLEDO, Lucas, OH | Pass | State |
| 2025-01-23 | USALCO FAIRFIELD PLANT, LLC — high-priority violation on file | FAIRFIELD, Butler, OH | Pass | State |
| 2025-01-23 | USALCO FAIRFIELD PLANT, LLC — high-priority violation on file | FAIRFIELD, Butler, OH | Pass | State |
| 2025-01-21 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-01-21 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-01-21 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-01-20 | EOG RESOURCES, INC. - STOCKER HN MON PAD | BOWERSTON, Harrison, OH | Pass | State |
| 2025-01-20 | EOG RESOURCES, INC. - STOCKER HN MON PAD | BOWERSTON, Harrison, OH | Pass | State |
| 2025-01-20 | EOG RESOURCES, INC. - STOCKER HN MON PAD | BOWERSTON, Harrison, OH | Pass | State |
| 2025-01-17 | BLUE RACER MIDSTREAM LLC - BELMONT CO FIELD STATION #1 | BARNESVILLE, Belmont, OH | Pass | State |
| 2025-01-17 | BLUE RACER MIDSTREAM LLC - BELMONT CO FIELD STATION #1 | BARNESVILLE, Belmont, OH | Pass | State |
| 2025-01-17 | BLUE RACER MIDSTREAM LLC - BELMONT CO FIELD STATION #1 | BARNESVILLE, Belmont, OH | Pass | State |
| 2025-01-17 | TAIT ELECTRIC GENERATING STATION | MORAINE, Montgomery, OH | Pass | State |
| 2025-01-17 | TAIT ELECTRIC GENERATING STATION | MORAINE, Montgomery, OH | Pass | State |
| 2025-01-16 | EOG RESOURCES, INC. - E CLARK SOUTH CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-01-16 | EOG RESOURCES, INC. - E CLARK SOUTH CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-01-16 | EOG RESOURCES, INC. - E CLARK SOUTH CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2025-01-16 | EOG RESOURCES INC - WOLVERINE CTB | FREEPORT, Harrison, OH | Pass | State |
| 2025-01-16 | EOG RESOURCES INC - WOLVERINE CTB | FREEPORT, Harrison, OH | Pass | State |
| 2025-01-16 | EOG RESOURCES INC - WOLVERINE CTB | FREEPORT, Harrison, OH | Pass | State |
| 2025-01-16 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #1 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-01-16 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #1 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-01-16 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #1 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-01-16 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #1 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-01-16 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #1 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-01-16 | BLUE RACER MIDSTREAM LLC - NOBLE CO FIELD STATION #1 | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-01-16 | DORN COLOR, LLC | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2025-01-15 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-01-15 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-01-15 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-01-15 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-01-15 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-01-15 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-01-15 | EQM OLYMPUS MIDSTREAM LLC - BIG KAHUNA CS | BELMONT, Belmont, OH | Pass | State |
| 2025-01-15 | EQM OLYMPUS MIDSTREAM LLC - BIG KAHUNA CS | BELMONT, Belmont, OH | Pass | State |
| 2025-01-15 | EQM OLYMPUS MIDSTREAM LLC - BIG KAHUNA CS | BELMONT, Belmont, OH | Pass | State |
| 2025-01-15 | EQM OLYMPUS MIDSTREAM LLC - BIG KAHUNA CS | BELMONT, Belmont, OH | Pass | State |
| 2025-01-15 | EOG RESOURCES INC - WOLVERINE CTB | FREEPORT, Harrison, OH | Pass | State |
| 2025-01-15 | EOG RESOURCES INC - WOLVERINE CTB | FREEPORT, Harrison, OH | Pass | State |
| 2025-01-15 | EOG RESOURCES INC - WOLVERINE CTB | FREEPORT, Harrison, OH | Pass | State |
| 2025-01-14 | ITEN INDUSTRIES, INC. - PLANT 1 | ASHTABULA, Ashtabula, OH | Pass | State |
| 2025-01-14 | ITEN INDUSTRIES, INC. - PLANT 1 | ASHTABULA, Ashtabula, OH | Pass | State |
| 2025-01-14 | ITEN INDUSTRIES, INC. - PLANT 1 | ASHTABULA, Ashtabula, OH | Pass | State |
| 2025-01-14 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-14 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Fail | State |
| 2025-01-14 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Pass | State |
| 2025-01-14 | CLARIOS, LLC. | HOLLAND, Lucas, OH | Fail | State |
| 2025-01-10 | CINCINNATI CHILDREN'S HOSPITAL MEDICAL CENTER | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-01-09 | CINCINNATI CHILDREN'S HOSPITAL MEDICAL CENTER | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-01-09 | CINCINNATI CHILDREN'S HOSPITAL MEDICAL CENTER | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-01-09 | CINCINNATI CHILDREN'S HOSPITAL MEDICAL CENTER | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-01-08 | EOG RESOURCES, INC. - BARNHART 36-12-5 PAD | KILGORE, Carroll, OH | Pass | State |
| 2025-01-08 | EOG RESOURCES, INC. - BARNHART 36-12-5 PAD | KILGORE, Carroll, OH | Pass | State |
| 2025-01-08 | EOG RESOURCES, INC. - BARNHART 36-12-5 PAD | KILGORE, Carroll, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
| 2025-01-08 | INR MIDSTREAM, LLC - UPPER HILL COMPRESSOR STATION | SARAHSVILLE, Noble, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.