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 |
|---|---|---|---|---|
| 2025-10-16 | GULFPORT APPALACHIA, LLC - EXTREME PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - EXTREME PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - EXTREME PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - LIMESTONE PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - LIMESTONE PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - LIMESTONE PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - KINYO PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - KINYO PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | GULFPORT APPALACHIA, LLC - KINYO PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2025-10-16 | MCINTIRE NORTH PAD 952640 | SARDIS, Monroe, OH | Pass | State |
| 2025-10-16 | MCINTIRE NORTH PAD 952640 | SARDIS, Monroe, OH | Pass | State |
| 2025-10-16 | MCINTIRE NORTH PAD 952640 | SARDIS, Monroe, OH | Pass | State |
| 2025-10-16 | MID-KAM CRUSHING LLC | CLEVELAND, Cuyahoga, OH | Pass | State |
| 2025-10-15 | ASCENT RESOURCES - UTICA LLC - HOWELL 33 SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-10-15 | ASCENT RESOURCES - UTICA LLC - HOWELL 33 SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-10-15 | ASCENT RESOURCES - UTICA LLC - HOWELL 33 SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-10-15 | EUREKA MIDSTREAM - CAIN RIDGE COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-10-15 | EUREKA MIDSTREAM - CAIN RIDGE COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-10-15 | EUREKA MIDSTREAM - CAIN RIDGE COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-10-15 | EUREKA MIDSTREAM - CAIN RIDGE COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-10-15 | EUREKA MIDSTREAM - CAIN RIDGE COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-10-15 | EUREKA MIDSTREAM - CAIN RIDGE COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-10-15 | CROWN CORK & SEAL - MASSILLON PLANT 42 | MASSILLON, Stark, OH | Pass | State |
| 2025-10-14 | LIBERTY CASTING INC. — high-priority violation on file | DELAWARE, Delaware, OH | Fail | State |
| 2025-10-14 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - DOMINO CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - DOMINO CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-14 | ASCENT RESOURCES - DOMINO CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-13 | ASCENT RESOURCES - BEACON CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | BLUE RACER MIDSTREAM LLC - CARROLL CO FIELD STATION #1 | CARROLLTON, Carroll, OH | Pass | State |
| 2025-10-10 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-10 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | LORAIN COUNTY RNG FACILITY — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-10-09 | ASCENT RESOURCES - UTICA LLC - PORTERFIELD WELL PAD | WASHINGTON, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-10-09 | ASCENT RESOURCES - UTICA LLC - PORTERFIELD WELL PAD | WASHINGTON, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-10-09 | ASCENT RESOURCES - UTICA LLC - PORTERFIELD WELL PAD | WASHINGTON, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2025-10-08 | MARKWEST - SENECA GAS PLANT | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-10-08 | MARKWEST - SENECA GAS PLANT | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-10-08 | MARKWEST - SENECA GAS PLANT | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-10-08 | MARKWEST - SENECA GAS PLANT | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-10-08 | MARKWEST - SENECA GAS PLANT | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-10-08 | MARKWEST - SENECA GAS PLANT | SUMMERFIELD, Noble, OH | Pass | State |
| 2025-10-08 | USALCO FAIRFIELD PLANT, LLC — high-priority violation on file | FAIRFIELD, Butler, OH | Pass | State |
| 2025-10-08 | USALCO FAIRFIELD PLANT, LLC — high-priority violation on file | FAIRFIELD, Butler, OH | Pass | State |
| 2025-10-08 | PPG - SOUTH PLANT — high-priority violation on file | BARBERTON, Summit, OH | Pass | State |
| 2025-10-07 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-10-07 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-10-07 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-10-07 | CRAWFORD COMPRESSOR STATION | LANCASTER, Fairfield, OH | Pass | State |
| 2025-10-03 | WOEBER MUSTARD MFG. CO. | SPRINGFIELD, Clark, OH | Pass | State |
| 2025-10-03 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-10-03 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-10-02 | INDUSTRIAL CONTAINER SERVICES, LLC — high-priority violation on file | GAHANNA, Franklin, OH | Fail | State |
| 2025-10-02 | INDUSTRIAL CONTAINER SERVICES, LLC — high-priority violation on file | GAHANNA, Franklin, OH | Fail | State |
| 2025-10-02 | ROBERT P. MONE PLANT | CONVOY, Van Wert, OH | Pass | State |
| 2025-10-02 | ROBERT P. MONE PLANT | CONVOY, Van Wert, OH | Pass | State |
| 2025-10-02 | WOEBER MUSTARD MFG. CO. | SPRINGFIELD, Clark, OH | Pass | State |
| 2025-10-02 | WOEBER MUSTARD MFG. CO. | SPRINGFIELD, Clark, OH | Pass | State |
| 2025-10-02 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-10-02 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-10-02 | FAIRBORN CEMENT COMPANY LLC | XENIA, Greene, OH | Pass | State |
| 2025-10-02 | BUCKEYE TERMINALS LLC CINCINNATI TERMINAL | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-10-01 | INDUSTRIAL CONTAINER SERVICES, LLC — high-priority violation on file | GAHANNA, Franklin, OH | Pass | State |
| 2025-10-01 | BOSTIK, INC. | ASHLAND, Ashland, OH | Pass | State |
| 2025-10-01 | ROBERT P. MONE PLANT | CONVOY, Van Wert, OH | Pass | State |
| 2025-10-01 | ROBERT P. MONE PLANT | CONVOY, Van Wert, OH | Pass | State |
| 2025-10-01 | BLUE RACER MIDSTREAM, LLC - HAYES STATION | SALESVILLE, Guernsey, OH | Pass | State |
| 2025-10-01 | BLUE RACER MIDSTREAM, LLC - HAYES STATION | SALESVILLE, Guernsey, OH | Pass | State |
| 2025-10-01 | BLUE RACER MIDSTREAM, LLC - HAYES STATION | SALESVILLE, Guernsey, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.