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 |
|---|---|---|---|---|
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-06-03 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-06-03 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | CARGILL, INC. - DAYTON | DAYTON, Montgomery, OH | Pass | State |
| 2026-06-03 | CARGILL, INC. - DAYTON | DAYTON, Montgomery, OH | Pass | State |
| 2026-06-02 | EOG RESOURCES, INC. - KIDD 21-12-6 PAD | SCIO, Harrison, OH | Pass | State |
| 2026-06-02 | EOG RESOURCES, INC. - KIDD 21-12-6 PAD | SCIO, Harrison, OH | Pass | State |
| 2026-06-02 | EOG RESOURCES, INC. - KIDD 21-12-6 PAD | SCIO, Harrison, OH | Pass | State |
| 2026-06-02 | DUANE WEISEND PAD 952440 | SUMMERFIELD, Noble, OH | Pass | State |
| 2026-06-02 | DUANE WEISEND PAD 952440 | SUMMERFIELD, Noble, OH | Pass | State |
| 2026-06-02 | DUANE WEISEND PAD 952440 | SUMMERFIELD, Noble, OH | Pass | State |
| 2026-05-29 | OREGON CLEAN ENERGY CENTER | OREGON, Lucas, OH | Pass | State |
| 2026-05-29 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2026-05-28 | MILLER-MASON PAVING CO., INC. | HILLSBORO, Highland, OH | Pass | State |
| 2026-05-28 | MAR ZANE PLANT NO 3 | GNADENHUTTEN, Tuscarawas, OH | Pass | State |
| 2026-05-28 | EOG RESOURCES, INC. - MCMILLEN TC RSH PAD | UHRICHSVILLE, Tuscarawas, OH | Pass | State |
| 2026-05-28 | EOG RESOURCES, INC. - MCMILLEN TC RSH PAD | UHRICHSVILLE, Tuscarawas, OH | Pass | State |
| 2026-05-28 | EOG RESOURCES, INC. - MCMILLEN TC RSH PAD | UHRICHSVILLE, Tuscarawas, OH | Pass | State |
| 2026-05-28 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2026-05-28 | MIAMI FORT POWER COMPANY LLC | NORTH BEND, Hamilton, OH | Pass | State |
| 2026-05-27 | EOG RESOURCES, INC. - HOLLYFIELD CR MON PAD | DELLROY, Carroll, OH | Pass | State |
| 2026-05-27 | EOG RESOURCES, INC. - HOLLYFIELD CR MON PAD | DELLROY, Carroll, OH | Pass | State |
| 2026-05-27 | EOG RESOURCES, INC. - HOLLYFIELD CR MON PAD | DELLROY, Carroll, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-27 | EOG RESOURCES, INC. - GOODING CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-27 | EOG RESOURCES, INC. - GOODING CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-27 | EOG RESOURCES, INC. - GOODING CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-26 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-26 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-26 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-26 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-26 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-26 | ROVER PIPELINE - MAINLINE CS3 | CHATFIELD, TOWNSHIP OF, Crawford, OH | Pass | State |
| 2026-05-26 | EOG RESOURCES, INC. - GOODING CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-26 | EOG RESOURCES, INC. - GOODING CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-26 | EOG RESOURCES, INC. - GOODING CTB | TIPPECANOE, Harrison, OH | Pass | State |
| 2026-05-26 | DAVID STALDER PAD 952419 | SARDIS, Monroe, OH | Pass | State |
| 2026-05-26 | DAVID STALDER PAD 952419 | SARDIS, Monroe, OH | Pass | State |
| 2026-05-26 | DAVID STALDER PAD 952419 | SARDIS, Monroe, OH | Pass | State |
| 2026-05-21 | CARMEUSE LIME, INC - GRAND RIVER OPERATIONS — high-priority violation on file | GRAND RIVER, Lake, OH | Pass | State |
| 2026-05-21 | CARMEUSE LIME, INC - GRAND RIVER OPERATIONS — high-priority violation on file | GRAND RIVER, Lake, OH | Pass | State |
| 2026-05-21 | CARMEUSE LIME, INC - GRAND RIVER OPERATIONS — high-priority violation on file | GRAND RIVER, Lake, OH | Pass | State |
| 2026-05-21 | ASCENT RESOURCES - UTICA LLC - OBOY CLR BL WELLPAD | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-21 | ASCENT RESOURCES - UTICA LLC - OBOY CLR BL WELLPAD | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-21 | ASCENT RESOURCES - UTICA LLC - OBOY CLR BL WELLPAD | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-05-21 | THE ANDERSONS RENEWABLES LLC - GREENVILLE PLANT — high-priority violation on file | GREENVILLE, Darke, OH | Fail | State |
| 2026-05-21 | THE ANDERSONS RENEWABLES LLC - GREENVILLE PLANT — high-priority violation on file | GREENVILLE, Darke, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | EQUITRANS MIDSTREAM COBRA COMPRESSOR STATION | SMITH, TOWNSHIP OF, Belmont, OH | Pass | State |
| 2026-05-20 | ASCENT RESOURCES - UTICA LLC - ATHENA SMF JF | SMITHFIELD, Jefferson, OH | Pass | State |
| 2026-05-20 | ASCENT RESOURCES - UTICA LLC - ATHENA SMF JF | SMITHFIELD, Jefferson, OH | Pass | State |
| 2026-05-20 | ASCENT RESOURCES - UTICA LLC - ATHENA SMF JF | SMITHFIELD, Jefferson, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.