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 |
|---|---|---|---|---|
| 2026-02-27 | 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 |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-26 | US GYPSUM COMPANY | GYPSUM, Ottawa, OH | Pass | State |
| 2026-02-26 | US GYPSUM COMPANY | GYPSUM, Ottawa, OH | Pass | State |
| 2026-02-26 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2026-02-26 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2026-02-26 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2026-02-26 | TRAMMO NITROGEN PRODUCTS, INC. | NORTH BEND, Hamilton, OH | Pass | State |
| 2026-02-24 | EASTERN GAS TRANSMISSION AND STORAGE, INC. - NEWARK | HANOVER, TOWNSHIP OF, Licking, OH | Pass | State |
| 2026-02-24 | EASTERN GAS TRANSMISSION AND STORAGE, INC. - NEWARK | HANOVER, TOWNSHIP OF, Licking, OH | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | MANSFIELD, Richland, OH | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | MANSFIELD, Richland, OH | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | MANSFIELD, Richland, OH | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | MANSFIELD, Richland, OH | Pass | State |
| 2026-02-24 | ENBRIDGE GAS OHIO - PIKE COMPRESSOR STATION | CANTON, Stark, OH | Pass | State |
| 2026-02-24 | ENBRIDGE GAS OHIO - PIKE COMPRESSOR STATION | CANTON, Stark, OH | Pass | State |
| 2026-02-24 | ENBRIDGE GAS OHIO - PIKE COMPRESSOR STATION | CANTON, Stark, OH | Pass | State |
| 2026-02-24 | ENBRIDGE GAS OHIO - PIKE COMPRESSOR STATION | CANTON, Stark, OH | Pass | State |
| 2026-02-24 | ENBRIDGE GAS OHIO - PIKE COMPRESSOR STATION | CANTON, Stark, OH | Pass | State |
| 2026-02-24 | ENBRIDGE GAS OHIO - PIKE COMPRESSOR STATION | CANTON, Stark, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-21 | MAHONING LANDFILL, INC. | SPRINGFIELD, TOWNSHIP OF, Mahoning, OH | Pass | State |
| 2026-02-19 | KENT STATE UNIVERSITY HEATING PLANT | KENT, Portage, OH | Pass | State |
| 2026-02-19 | KENT STATE UNIVERSITY HEATING PLANT | KENT, Portage, OH | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | MONROE, TOWNSHIP OF, Richland, OH | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | MONROE, TOWNSHIP OF, Richland, OH | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | MONROE, TOWNSHIP OF, Richland, OH | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | MONROE, TOWNSHIP OF, Richland, OH | Pass | State |
| 2026-02-18 | HOLLIDAY PAD 952538 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-02-18 | HOLLIDAY PAD 952538 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-02-18 | HOLLIDAY PAD 952538 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-02-18 | MOSER PAD 952658 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-02-18 | MOSER PAD 952658 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-02-18 | MOSER PAD 952658 | CLARINGTON, Monroe, OH | Pass | State |
| 2026-02-17 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2026-02-17 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2026-02-17 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2026-02-17 | RIGGENBACH PAD 952771 | SARDIS, Monroe, OH | Pass | State |
| 2026-02-17 | RIGGENBACH PAD 952771 | SARDIS, Monroe, OH | Pass | State |
| 2026-02-17 | RIGGENBACH PAD 952771 | SARDIS, Monroe, OH | Pass | State |
| 2026-02-17 | COOPER STANDARD AUTOMOTIVE | NEW LEXINGTON, Perry, OH | Pass | State |
| 2026-02-17 | COOPER STANDARD AUTOMOTIVE | NEW LEXINGTON, Perry, OH | Pass | State |
| 2026-02-17 | COOPER STANDARD AUTOMOTIVE | NEW LEXINGTON, Perry, OH | Pass | State |
| 2026-02-17 | COOPER STANDARD AUTOMOTIVE | NEW LEXINGTON, Perry, OH | Pass | State |
| 2026-02-16 | MIAMI UNIVERSITY | OXFORD, Butler, OH | Pass | State |
| 2026-02-12 | EOG RESOURCES, INC. - SMELTZ 23-13-5 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-02-12 | EOG RESOURCES, INC. - SMELTZ 23-13-5 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-02-12 | EOG RESOURCES, INC. - SMELTZ 23-13-5 PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-02-12 | BASF CORPORATION | ELYRIA, Lorain, OH | Pass | State |
| 2026-02-12 | BASF CORPORATION | ELYRIA, Lorain, OH | Pass | State |
| 2026-02-12 | MIAMI UNIVERSITY | OXFORD, Butler, OH | Pass | State |
| 2026-02-12 | MIAMI UNIVERSITY | OXFORD, Butler, OH | Pass | State |
| 2026-02-11 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | MARYSVILLE, Union, OH | Pass | State |
| 2026-02-11 | ENBRIDGE GAS OHIO - AUGUSTA COMPRESSOR STATION | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-02-11 | ENBRIDGE GAS OHIO - AUGUSTA COMPRESSOR STATION | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-02-11 | ENBRIDGE GAS OHIO - AUGUSTA COMPRESSOR STATION | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-02-11 | ENBRIDGE GAS OHIO - AUGUSTA COMPRESSOR STATION | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-02-11 | ENBRIDGE GAS OHIO - AUGUSTA COMPRESSOR STATION | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-02-11 | ENBRIDGE GAS OHIO - AUGUSTA COMPRESSOR STATION | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-11 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2026-02-10 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2026-02-10 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2026-02-10 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2026-02-10 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2026-02-10 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2026-02-10 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-02-10 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.