EPA Air · stack tests by state and year
Air-emissions stack tests in Ohio, 2026
- 1,474Stack 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 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Ohio, 2026
- Belmont County 206
- Monroe County 168
- Harrison County 159
- Carroll County 104
- Lucas County 100
- Jefferson County 75
- Noble County 64
- Columbiana County 55
- Guernsey County 45
- Stark County 44
- Wayne County 28
- Mahoning County 28
- Fulton County 25
- Perry County 25
- Richland County 24
- Hamilton County 21
- Marion County 17
- Scioto County 15
- Greene County 15
- Muskingum County 15
- Tuscarawas County 15
- Crawford County 15
- Wood County 13
- Ashtabula County 12
- Brown County 11
- Wyandot County 11
- Butler County 9
- Seneca County 9
- Trumbull County 9
- Cuyahoga County 8
- Defiance County 8
- Lake County 8
- Ottawa County 8
- Washington County 7
- Coshocton County 7
- Pickaway County 7
- Union County 7
- Miami County 6
- Montgomery County 6
- Erie County 6
- Darke County 6
- Shelby County 5
- Undetermined County 5
- Franklin County 4
- Summit County 4
- Portage County 4
- Putnam County 3
- Holmes County 3
- Fayette County 3
- Licking County 3
- Jackson County 3
Ohio, other years
Air-emissions stack tests recorded in Ohio, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-12 | UTICA GAS SERVICES, LLC - SCIO COMPRESSOR STATION | SCIO, Harrison, OH | Pass | State |
| 2026-03-11 | WIN WASTE INNOVATIONS OF SENECA COUNTY | FOSTORIA, Seneca, OH | Pass | State |
| 2026-03-11 | ENBRIDGE- NEW CAMBRIDGE COMPRESSOR STATION | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-11 | ENBRIDGE- NEW CAMBRIDGE COMPRESSOR STATION | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-11 | ENBRIDGE- NEW CAMBRIDGE COMPRESSOR STATION | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-11 | ENBRIDGE- NEW CAMBRIDGE COMPRESSOR STATION | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-11 | ENBRIDGE- NEW CAMBRIDGE COMPRESSOR STATION | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-11 | ENBRIDGE- NEW CAMBRIDGE COMPRESSOR STATION | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-10 | AVERY DENNISON STD, BLDG 5 | PAINESVILLE, Lake, OH | Pass | State |
| 2026-03-10 | AVERY DENNISON STD, BLDG 5 | PAINESVILLE, Lake, OH | Pass | State |
| 2026-03-10 | MOMENTIVE PERFORMANCE MATERIALS QUARTZ INC | WILLOUGHBY, Lake, OH | Pass | State |
| 2026-03-10 | MOMENTIVE PERFORMANCE MATERIALS QUARTZ INC | WILLOUGHBY, Lake, OH | Pass | State |
| 2026-03-10 | MOMENTIVE PERFORMANCE MATERIALS QUARTZ INC | WILLOUGHBY, Lake, OH | Pass | State |
| 2026-03-10 | DOMINION RESOURCE SERVICES - SIRON | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-10 | DOMINION RESOURCE SERVICES - SIRON | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-10 | DOMINION RESOURCE SERVICES - SIRON | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-03-10 | SHUR GREEN FARMS LLC | ANSONIA, Darke, OH | Pass | State |
| 2026-03-10 | SHUR GREEN FARMS LLC | ANSONIA, Darke, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-06 | MARKWEST BARNESVILLE WEST COMPRESSOR STATION | WARREN, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-03-05 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2026-03-05 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2026-03-05 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2026-03-05 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2026-03-05 | PILKINGTON NORTH AMERICA INC — high-priority violation on file | ROSSFORD, Wood, OH | Pass | State |
| 2026-03-05 | RICE DRILLING D LLC - EISENBARTH PAD | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-05 | RICE DRILLING D LLC - EISENBARTH PAD | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-05 | RICE DRILLING D LLC - EISENBARTH PAD | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-05 | YELLOW ROSE PAD 953034 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-03-05 | YELLOW ROSE PAD 953034 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-03-05 | YELLOW ROSE PAD 953034 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-03-04 | WOODCHOPPER PAD 952995 | MACKSBURG, Washington, OH | Pass | State |
| 2026-03-04 | WOODCHOPPER PAD 952995 | MACKSBURG, Washington, OH | Pass | State |
| 2026-03-04 | WOODCHOPPER PAD 952995 | MACKSBURG, Washington, OH | Pass | State |
| 2026-03-03 | NSG GLASS NORTH AMERICA, INC. — high-priority violation on file | LUCKEY, Wood, OH | Pass | State |
| 2026-03-03 | NSG GLASS NORTH AMERICA, INC. — high-priority violation on file | LUCKEY, Wood, OH | Pass | State |
| 2026-03-03 | NSG GLASS NORTH AMERICA, INC. — high-priority violation on file | LUCKEY, Wood, OH | Pass | State |
| 2026-03-03 | NSG GLASS NORTH AMERICA, INC. — high-priority violation on file | LUCKEY, Wood, OH | Pass | State |
| 2026-03-03 | NSG GLASS NORTH AMERICA, INC. — high-priority violation on file | LUCKEY, Wood, OH | Pass | State |
| 2026-03-03 | GULFPORT APPALACHIA, LLC - SCHUBERT WELL PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2026-03-03 | GULFPORT APPALACHIA, LLC - SCHUBERT WELL PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2026-03-03 | GULFPORT APPALACHIA, LLC - SCHUBERT WELL PAD | RAYLAND, Jefferson, OH | Pass | State |
| 2026-03-03 | ORMET 9 PAD 952729 | HANNIBAL, Monroe, OH | Pass | State |
| 2026-03-03 | ORMET 9 PAD 952729 | HANNIBAL, Monroe, OH | Pass | State |
| 2026-03-03 | ORMET 9 PAD 952729 | HANNIBAL, Monroe, OH | Pass | State |
| 2026-03-03 | ORMET 15 PAD 952728 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-03 | ORMET 15 PAD 952728 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-03 | ORMET 15 PAD 952728 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-03 | EQM OLYMPUS MIDSTREAM, LLC - SWITZ 27 CS | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-03 | EQM OLYMPUS MIDSTREAM, LLC - SWITZ 27 CS | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-03 | EQM OLYMPUS MIDSTREAM, LLC - SWITZ 27 CS | CLARINGTON, Monroe, OH | Pass | State |
| 2026-03-03 | OHIO POWER PARTNERS, LLC | MIDDLETOWN, Butler, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | KILGORE COMPRESSOR STATION-UTICA GAS SERVICES, LLC | KILGORE, Carroll, OH | Pass | State |
| 2026-03-02 | PROCTER & GAMBLE MASON BUSINESS & INNOVATION CENTER | MASON, Warren, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.