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 |
|---|---|---|---|---|
| 2025-06-19 | 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 | BLUE RACER MIDSTREAM, LLC - MIZER STATION | CADIZ, Harrison, OH | Pass | State |
| 2025-06-19 | BLUE RACER MIDSTREAM, LLC - MIZER STATION | CADIZ, Harrison, OH | Pass | State |
| 2025-06-18 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2025-06-18 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2025-06-18 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2025-06-18 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2025-06-18 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2025-06-18 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2025-06-17 | EQUITRANS LP - PLASMA COMPRESSOR STATION | CLARINGTON, Monroe, OH | Pass | State |
| 2025-06-17 | CONSOLIDATED PACKAGING GROUP — high-priority violation on file | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-06-17 | CONSOLIDATED PACKAGING GROUP — high-priority violation on file | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-06-17 | CONSOLIDATED PACKAGING GROUP — high-priority violation on file | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-17 | KENMORE ASPHALT PRODUCTS, INC. - PLANT 2 | MASSILLON, Stark, OH | Pass | State |
| 2025-06-17 | KENMORE ASPHALT PRODUCTS, INC. - PLANT 2 | MASSILLON, Stark, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Fail | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-16 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | DUKE ENERGY INDIANA, MADISON GENERATING STATION | TRENTON, Butler, OH | Pass | State |
| 2025-06-13 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-13 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-13 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-13 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-12 | CALGON CARBON CORP. | COLUMBUS, Franklin, OH | Pass | State |
| 2025-06-12 | BLUE RACER MIDSTREAM LLC - GUERNSEY CO FIELD STATION #1 | FAIRVIEW, Guernsey, OH | Pass | State |
| 2025-06-11 | EOG RESOURCES, INC. - FOLSAM CR HAR PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-06-11 | EOG RESOURCES, INC. - FOLSAM CR HAR PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-06-11 | EOG RESOURCES, INC. - FOLSAM CR HAR PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | ROSEBUD DATA CENTER — high-priority violation on file | LISBON, Columbiana, OH | Pass | State |
| 2025-06-11 | BLUE RACER MIDSTREAM LLC - HFS#3 (ATHENS B) | NEW ATHENS, Harrison, OH | Pass | State |
| 2025-06-11 | BLUE RACER MIDSTREAM LLC - HFS#3 (ATHENS B) | NEW ATHENS, Harrison, OH | Pass | State |
| 2025-06-11 | BLUE RACER MIDSTREAM LLC - HFS#3 (ATHENS B) | NEW ATHENS, Harrison, OH | Pass | State |
| 2025-06-11 | MAR ZANE PLANT NO 9 | CHILLICOTHE, Ross, OH | Pass | State |
| 2025-06-11 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2025-06-11 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2025-06-11 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2025-06-11 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-11 | OWENS CORNING ROOFING AND ASPHALT, LLC | MEDINA, Medina, OH | Pass | State |
| 2025-06-10 | BLUE RACER MIDSTREAM LLC - HFS#2 | CADIZ, Harrison, OH | Pass | State |
| 2025-06-10 | BLUE RACER MIDSTREAM LLC - HFS#2 | CADIZ, Harrison, OH | Pass | State |
| 2025-06-10 | BLUE RACER MIDSTREAM LLC - HFS#2 | CADIZ, Harrison, OH | Pass | State |
| 2025-06-09 | BLUE RACER MIDSTREAM LLC - BFS#2 (FLUSHING A) | FLUSHING, Belmont, OH | Pass | State |
| 2025-06-09 | BLUE RACER MIDSTREAM LLC - BFS#2 (FLUSHING A) | FLUSHING, Belmont, OH | Pass | State |
| 2025-06-09 | BLUE RACER MIDSTREAM LLC - BFS#2 (FLUSHING A) | FLUSHING, Belmont, OH | Pass | State |
| 2025-06-06 | CALGON CARBON CORP. | COLUMBUS, Franklin, OH | Pass | State |
| 2025-06-06 | CALGON CARBON CORP. | COLUMBUS, Franklin, OH | Pass | State |
| 2025-06-06 | CALGON CARBON CORP. | COLUMBUS, Franklin, OH | Pass | State |
| 2025-06-06 | EOG RESOURCES, INC. - FOLSAM CR HAR PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-06-06 | EOG RESOURCES, INC. - FOLSAM CR HAR PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-06-06 | EOG RESOURCES, INC. - FOLSAM CR HAR PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2025-06-06 | FERROGLOBE USA METALLURGICAL, INC. | WATERFORD, Washington, OH | Pass | State |
| 2025-06-06 | FERROGLOBE USA METALLURGICAL, INC. | WATERFORD, Washington, OH | Pass | State |
| 2025-06-06 | FERROGLOBE USA METALLURGICAL, INC. | WATERFORD, Washington, OH | Pass | State |
| 2025-06-06 | FERROGLOBE USA METALLURGICAL, INC. | WATERFORD, Washington, OH | Pass | State |
| 2025-06-06 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.