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 |
|---|---|---|---|---|
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - CRAVAT WHL BL WELL PAD | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - CRAVAT WHL BL WELL PAD | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - CRAVAT WHL BL WELL PAD | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - TRUCHAN NW WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - TRUCHAN NW WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - TRUCHAN NW WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - MATUSEK WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - MATUSEK WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | ASCENT RESOURCES - UTICA LLC - MATUSEK WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-19 | EOG RESOURCES, INC. - E CLARK SOUTH CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-19 | EOG RESOURCES, INC. - E CLARK SOUTH CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-19 | EOG RESOURCES, INC. - E CLARK SOUTH CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-19 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2026-05-19 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2026-05-19 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2026-05-19 | ALTIVIA PETROCHEMICALS, LLC | HAVERHILL, Scioto, OH | Pass | State |
| 2026-05-19 | THE ANDERSONS RENEWABLES LLC - GREENVILLE PLANT — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2026-05-19 | THE ANDERSONS RENEWABLES LLC - GREENVILLE PLANT — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Fail | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Fail | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-19 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-18 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-18 | IRONROCK CAPITAL, INC. — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2026-05-15 | WALLEYE POWER, LLC, BAY SHORE PLANT | OREGON, Lucas, OH | Pass | State |
| 2026-05-15 | GENERAL JAMES M. GAVIN POWER PLANT | CHESHIRE, Gallia, OH | Pass | State |
| 2026-05-14 | INDUSTRIAL CONTAINER SERVICES, LLC — high-priority violation on file | GAHANNA, Franklin, OH | Pass | State |
| 2026-05-14 | INDUSTRIAL CONTAINER SERVICES, LLC — high-priority violation on file | GAHANNA, Franklin, OH | Pass | State |
| 2026-05-14 | INDUSTRIAL CONTAINER SERVICES, LLC — high-priority violation on file | GAHANNA, Franklin, OH | Pass | State |
| 2026-05-12 | ASCENT RESOURCES - UTICA LLC - EUREKA | BELMONT, Belmont, OH | Pass | State |
| 2026-05-12 | ASCENT RESOURCES - UTICA LLC - EUREKA | BELMONT, Belmont, OH | Pass | State |
| 2026-05-12 | ASCENT RESOURCES - UTICA LLC - EUREKA | BELMONT, Belmont, OH | Pass | State |
| 2026-05-12 | ASCENT RESOURCES - UTICA LLC - CROWIE RCH BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-12 | ASCENT RESOURCES - UTICA LLC - CROWIE RCH BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-12 | ASCENT RESOURCES - UTICA LLC - CROWIE RCH BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-11 | AMG VANADIUM LLC — high-priority violation on file | CAMBRIDGE, Guernsey, OH | Pass | State |
| 2026-05-08 | EOG RESOURCES, INC. - ECKLEY CR CEN PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-05-08 | EOG RESOURCES, INC. - ECKLEY CR CEN PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-05-08 | EOG RESOURCES, INC. - ECKLEY CR CEN PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-05-08 | EOG RESOURCES, INC. - NORRIS CL WES PAD | EAST ROCHESTER, Columbiana, OH | Pass | State |
| 2026-05-08 | EOG RESOURCES, INC. - NORRIS CL WES PAD | EAST ROCHESTER, Columbiana, OH | Pass | State |
| 2026-05-08 | EOG RESOURCES, INC. - NORRIS CL WES PAD | EAST ROCHESTER, Columbiana, OH | Pass | State |
| 2026-05-08 | ROCKIES EXPRESS PIPELINE LLC- CHANDLERSVILLE CS | PHILO, Muskingum, OH | Pass | State |
| 2026-05-07 | EOG RESOURCES, INC - WEHR SPRING VALLEY FARM MH ELS PAD | BERLIN, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-05-07 | EOG RESOURCES, INC - WEHR SPRING VALLEY FARM MH ELS PAD | BERLIN, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-05-07 | EOG RESOURCES, INC - WEHR SPRING VALLEY FARM MH ELS PAD | BERLIN, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
| 2026-05-07 | ENBRIDGE GAS OHIO - CHIPPEWA STATION | DOYLESTOWN, Wayne, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.