EPA Air · stack tests by state and year
Air-emissions stack tests in Ohio, 2025
- 2,213Stack 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 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Ohio, 2025
- Monroe County 233
- Belmont County 210
- Lucas County 209
- Harrison County 199
- Carroll County 138
- Jefferson County 121
- Guernsey County 95
- Noble County 84
- Montgomery County 68
- Defiance County 65
- Franklin County 61
- Hamilton County 58
- Medina County 43
- Undetermined County 42
- Butler County 34
- Putnam County 34
- Stark County 33
- Lorain County 31
- Columbiana County 27
- Wood County 26
- Cuyahoga County 25
- Trumbull County 24
- Mahoning County 23
- Perry County 23
- Marion County 20
- Tuscarawas County 20
- Fairfield County 18
- Licking County 17
- Crawford County 16
- Greene County 15
- Union County 15
- Ashtabula County 14
- Darke County 12
- Washington County 12
- Williams County 12
- Allen County 11
- Wayne County 10
- Brown County 9
- Miami County 9
- Summit County 9
- Warren County 8
- Richland County 7
- Clark County 6
- Huron County 6
- Athens County 5
- Muskingum County 5
- Erie County 5
- Van Wert County 4
- Hancock County 4
- Delaware County 3
- Shelby County 3
- Portage County 3
- Coshocton County 3
- Lake County 3
- Jackson County 3
Ohio, other years
Air-emissions stack tests recorded in Ohio, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-02-20 | KENT STATE UNIVERSITY HEATING PLANT | KENT, Portage, OH | Pass | State |
| 2025-02-19 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-02-19 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-02-19 | FIRST SOLAR INC. | WALBRIDGE, Wood, OH | Pass | State |
| 2025-02-19 | FIRST SOLAR INC. | WALBRIDGE, Wood, OH | Pass | State |
| 2025-02-18 | EOG RESOURCES, INC. - TOOT 22-14-6 PAD | DELLROY, Carroll, OH | Pass | State |
| 2025-02-18 | EOG RESOURCES, INC. - TOOT 22-14-6 PAD | DELLROY, Carroll, OH | Pass | State |
| 2025-02-18 | EOG RESOURCES, INC. - TOOT 22-14-6 PAD | DELLROY, Carroll, OH | Pass | State |
| 2025-02-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2025-02-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2025-02-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2025-02-18 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Fail | State |
| 2025-02-15 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Fail | State |
| 2025-02-14 | ASCENT RESOURCES - UTICA LLC - CYPRESS CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-14 | ASCENT RESOURCES - UTICA LLC - CYPRESS CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-14 | ASCENT RESOURCES - UTICA LLC - CYPRESS CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-13 | ASCENT RESOURCES - UTICA LLC - CYPRESS CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-13 | ASCENT RESOURCES - UTICA LLC - CYPRESS CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-13 | ASCENT RESOURCES - UTICA LLC - CYPRESS CDZ HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-13 | ASCENT RESOURCES - UTICA LLC - LIGGETT ATH HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-13 | ASCENT RESOURCES - UTICA LLC - LIGGETT ATH HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-13 | ASCENT RESOURCES - UTICA LLC - LIGGETT ATH HR | CADIZ, Harrison, OH | Pass | State |
| 2025-02-12 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2025-02-12 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2025-02-12 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2025-02-12 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2025-02-12 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2025-02-12 | EAST OHIO GAS - COLUMBIANA COMPRESSOR STATION | KNOX, TOWNSHIP OF, Columbiana, OH | Pass | State |
| 2025-02-12 | ASCENT RESOURCES - UTICA LLC - ROCK RIDGE WRN BL | BARNESVILLE, Belmont, OH | Pass | State |
| 2025-02-12 | ASCENT RESOURCES - UTICA LLC - ROCK RIDGE WRN BL | BARNESVILLE, Belmont, OH | Pass | State |
| 2025-02-12 | ASCENT RESOURCES - UTICA LLC - ROCK RIDGE WRN BL | BARNESVILLE, Belmont, OH | Pass | State |
| 2025-02-12 | ASCENT RESOURCES - UTICA LLC - SLABAUGH RCH GR | SALESVILLE, Guernsey, OH | Pass | State |
| 2025-02-12 | ASCENT RESOURCES - UTICA LLC - SLABAUGH RCH GR | SALESVILLE, Guernsey, OH | Pass | State |
| 2025-02-12 | ASCENT RESOURCES - UTICA LLC - SLABAUGH RCH GR | SALESVILLE, Guernsey, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | EQM OLYMP MIDSTM GOLIATH, GODZILLA FORTRESS CMPRSR STNS | BEALLSVILLE, Monroe, OH | Pass | State |
| 2025-02-12 | ERAMET MARIETTA, INC. — high-priority violation on file | MARIETTA, Washington, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | INR MIDSTREAM, LLC - MADISON COMPRESSOR STATION | WOODSFIELD, Monroe, OH | Pass | State |
| 2025-02-11 | GE AEROSPACE EVENDALE PLANT | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-02-11 | GE AEROSPACE EVENDALE PLANT | CINCINNATI, Hamilton, OH | Pass | State |
| 2025-02-11 | CORRCHOICE, LLC - MASSILLON MILL — high-priority violation on file | MASSILLON, Stark, OH | Pass | State |
| 2025-02-11 | CORRCHOICE, LLC - MASSILLON MILL — high-priority violation on file | MASSILLON, Stark, OH | Pass | State |
| 2025-02-11 | CORRCHOICE, LLC - MASSILLON MILL — high-priority violation on file | MASSILLON, Stark, OH | Pass | State |
| 2025-02-07 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2025-02-07 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2025-02-07 | ROCKIES EXPRESS PIPELINE - SENECA COMPRESSOR STATION — high-priority violation on file | OHIO, Undetermined, OH | Pass | State |
| 2025-02-07 | TRAMMO NITROGEN PRODUCTS, INC. | NORTH BEND, Hamilton, OH | Pass | State |
| 2025-02-07 | TRAMMO NITROGEN PRODUCTS, INC. | NORTH BEND, Hamilton, OH | Pass | State |
| 2025-02-06 | ASCENT RESOURCES-UTICA LLC - SHUGERT DADDY 24-2-1 WELL | LORE CITY, Guernsey, OH | Pass | State |
| 2025-02-06 | ASCENT RESOURCES-UTICA LLC - SHUGERT DADDY 24-2-1 WELL | LORE CITY, Guernsey, OH | Pass | State |
| 2025-02-06 | ASCENT RESOURCES-UTICA LLC - SHUGERT DADDY 24-2-1 WELL | LORE CITY, Guernsey, OH | Pass | State |
| 2025-02-06 | ASCENT RESOURCES - UTICA LLC - WAMPUM RCH BL | LORE CITY, Guernsey, OH | Pass | State |
| 2025-02-06 | ASCENT RESOURCES - UTICA LLC - WAMPUM RCH BL | LORE CITY, Guernsey, OH | Pass | State |
| 2025-02-06 | ASCENT RESOURCES - UTICA LLC - WAMPUM RCH BL | LORE CITY, Guernsey, OH | Pass | State |
| 2025-02-06 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2025-02-06 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2025-02-06 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2025-02-06 | RICHARD STALDER PAD 952766 | SARDIS, Monroe, OH | Pass | State |
| 2025-02-06 | DIETRICH PAD 952432 | CLARINGTON, Monroe, OH | Pass | State |
| 2025-02-06 | DIETRICH PAD 952432 | CLARINGTON, Monroe, OH | Pass | State |
| 2025-02-06 | DIETRICH PAD 952432 | CLARINGTON, Monroe, OH | Pass | State |
| 2025-02-05 | TAIT ELECTRIC GENERATING STATION | MORAINE, Montgomery, OH | Pass | State |
| 2025-02-05 | TAIT ELECTRIC GENERATING STATION | MORAINE, Montgomery, OH | Pass | State |
| 2025-02-05 | CITY OF AKRON STEAM GENERATING | AKRON, Summit, OH | Pass | State |
| 2025-02-04 | ASCENT RESOURCES - UTICA LLC - COLLINS WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-02-04 | ASCENT RESOURCES - UTICA LLC - COLLINS WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-02-04 | ASCENT RESOURCES - UTICA LLC - COLLINS WYN JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2025-02-04 | ASCENT RESOURCES - UTICA LLC - GIUSTO CRC JF | STEUBENVILLE, Jefferson, OH | Pass | State |
| 2025-02-04 | ASCENT RESOURCES - UTICA LLC - GIUSTO CRC JF | STEUBENVILLE, Jefferson, OH | Pass | State |
| 2025-02-04 | ASCENT RESOURCES - UTICA LLC - GIUSTO CRC JF | STEUBENVILLE, Jefferson, OH | Pass | State |
| 2025-02-04 | HANGING ROCK POWER COMPANY, LLC | IRONTON, Lawrence, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.