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 |
|---|---|---|---|---|
| 2026-04-21 | EQM OLYMPUS MIDSTREAM, LLC - RIFLE COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-04-21 | EQM OLYMPUS MIDSTREAM, LLC - RIFLE COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-04-21 | EQM OLYMPUS MIDSTREAM, LLC - RIFLE COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-04-21 | EQM OLYMPUS MIDSTREAM, LLC - RIFLE COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-04-21 | EQM OLYMPUS MIDSTREAM, LLC - RIFLE COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-04-21 | NEATON AUTO PRODUCTS MANUFACTURING, INC. | EATON, Preble, OH | Pass | State |
| 2026-04-21 | NEATON AUTO PRODUCTS MANUFACTURING, INC. | EATON, Preble, OH | Pass | State |
| 2026-04-21 | CARGILL, INCORPORATED - SALT DIVISION | AKRON, Summit, OH | Pass | State |
| 2026-04-20 | MIDDLETOWN COKE COMPANY, LLC — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2026-04-15 | SOFIDEL AMERICA — high-priority violation on file | CIRCLEVILLE, Pickaway, OH | Pass | State |
| 2026-04-15 | SOFIDEL AMERICA — high-priority violation on file | CIRCLEVILLE, Pickaway, OH | Pass | State |
| 2026-04-15 | SOFIDEL AMERICA — high-priority violation on file | CIRCLEVILLE, Pickaway, OH | Pass | State |
| 2026-04-15 | SOFIDEL AMERICA — high-priority violation on file | CIRCLEVILLE, Pickaway, OH | Pass | State |
| 2026-04-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | MANSFIELD, Richland, OH | Pass | State |
| 2026-04-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | MANSFIELD, Richland, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-04-14 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | MANSFIELD, Richland, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-10 | DTM UTICA, LLC - BELLE VALLEY COMPRESSOR STATION | BELLE VALLEY, Noble, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-04-08 | CLEVELAND-CLIFFS STEEL CORPORATION — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2026-04-08 | CLEVELAND-CLIFFS STEEL CORPORATION — high-priority violation on file | MIDDLETOWN, Butler, OH | Pass | State |
| 2026-04-07 | CLEVELAND STEEL CONTAINER CORPORATION | YOUNGSTOWN, Mahoning, OH | Pass | State |
| 2026-04-07 | DTE ST. BERNARD, LLC | CINCINNATI, Hamilton, OH | Pass | State |
| 2026-04-07 | DTE ST. BERNARD, LLC | CINCINNATI, Hamilton, OH | Pass | State |
| 2026-04-02 | EOG RESOURCES, INC - INDIGO CTB | MALVERN, Carroll, OH | Pass | State |
| 2026-04-02 | EOG RESOURCES, INC - INDIGO CTB | MALVERN, Carroll, OH | Pass | State |
| 2026-04-02 | EOG RESOURCES, INC - INDIGO CTB | MALVERN, Carroll, OH | Pass | State |
| 2026-03-31 | RUFENER PAD 952860 | SARDIS, Monroe, OH | Pass | State |
| 2026-03-31 | RUFENER PAD 952860 | SARDIS, Monroe, OH | Pass | State |
| 2026-03-31 | RUFENER PAD 952860 | SARDIS, Monroe, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-31 | BROWN COUNTY LANDFILL GAS POWER STATION | GEORGETOWN, Brown, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
| 2026-03-27 | NORTHSTAR BLUESCOPE STEEL, LLC | DELTA, Fulton, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.