EPA Air · stack tests by year
Air-emissions stack tests in 2026
- 11,110Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2026
- Ohio 1,474
- Indiana 1,010
- California 979
- Florida 795
- Wyoming 755
- New Mexico 724
- Georgia 509
- Pennsylvania 501
- Arkansas 374
- Alabama 357
- Missouri 326
- Texas 316
- Mississippi 263
- Michigan 207
- North Carolina 188
- Colorado 185
- Iowa 167
- Illinois 165
- South Carolina 135
- Wisconsin 135
- West Virginia 114
- Virginia 98
- Idaho 96
- Montana 91
- Tennessee 84
- Minnesota 84
- Delaware 73
- Kentucky 71
- Arizona 71
- Connecticut 68
- Kansas 63
- Nevada 57
- Massachusetts 54
- North Dakota 52
- Nebraska 51
- Utah 51
- Washington 46
- Alaska 45
- New York 43
- South Dakota 34
- District of Columbia 30
- New Hampshire 29
- Maryland 28
- Oregon 27
- Louisiana 26
- Hawaii 21
- Oklahoma 15
- Rhode Island 13
- Puerto Rico 5
- Maine 5
Other years
Air-emissions stack tests recorded in 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-06-16 | SEMINOLE ELECTRIC COOPERATIVE, INC. | BOWLING GREEN, Hardee, FL | Pass | State |
| 2026-06-16 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2026-06-16 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2026-06-16 | TAMPA ELECTRIC COMPANY | TAMPA, Hillsborough, FL | Pass | State |
| 2026-06-16 | THIELE KAOLIN COMPANY, REEDY CREEK | WRENS, Glascock, GA | Pass | State |
| 2026-06-16 | SMARR ENERGY FACILITY | SMARR, Monroe, GA | Pass | State |
| 2026-06-16 | C.W.MATTHEWS CONSTRUCTING COMPANY INC. DALTON PLANT | DALTON, Whitfield, GA | Pass | State |
| 2026-06-16 | THE ANDERSONS MARATHON HOLDINGS LLC — high-priority violation on file | DENISON, Crawford, IA | Pass | State |
| 2026-06-16 | MARTIN MARIETTA INC-ALDEN | ALDEN, Hardin, IA | Pass | State |
| 2026-06-16 | HK CONTRACTORS INC 00079 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | HK CONTRACTORS INC 00121 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | HK CONTRACTORS INC 00168 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | HK CONTRACTORS 00413 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | HK CONTRACTORS INC 00463 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | HK CONTRACTORS INC 00480 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | HK CONTRACTORS 00495 | IDAHO FALLS, Bonneville, ID | Pass | State |
| 2026-06-16 | CITY OF ALTAMONT | ALTAMONT, Effingham, IL | Pass | State |
| 2026-06-16 | CITY OF ALTAMONT | ALTAMONT, Effingham, IL | Pass | State |
| 2026-06-16 | US STEEL CORPORATION GARY WORKS — high-priority violation on file | GARY, Lake, IN | Pass | State |
| 2026-06-16 | US STEEL CORPORATION GARY WORKS — high-priority violation on file | GARY, Lake, IN | Pass | State |
| 2026-06-16 | US STEEL CORPORATION GARY WORKS — high-priority violation on file | GARY, Lake, IN | Pass | State |
| 2026-06-16 | US STEEL CORPORATION GARY WORKS — high-priority violation on file | GARY, Lake, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Fail | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | BUNGE NORTH AMERICA (EAST), LLC — high-priority violation on file | MORRISTOWN, Shelby, IN | Pass | State |
| 2026-06-16 | GLOBE INDUSTRIAL LLC/ GLOBE INDUSTRIES LLC | PEKIN, Washington, IN | Pass | State |
| 2026-06-16 | GLOBE INDUSTRIAL LLC/ GLOBE INDUSTRIES LLC | PEKIN, Washington, IN | Pass | State |
| 2026-06-16 | GLOBE INDUSTRIAL LLC/ GLOBE INDUSTRIES LLC | PEKIN, Washington, IN | Pass | State |
| 2026-06-16 | GLOBE INDUSTRIAL LLC/ GLOBE INDUSTRIES LLC | PEKIN, Washington, IN | Pass | State |
| 2026-06-16 | BALDWIN CITY MUN. POWER PLANT #2 (AIR) | BALDWIN CITY, Douglas, KS | Pass | State |
| 2026-06-16 | MSM - ONAGA QUARRY (AIR) | WESTMORELAND, Pottawatomie, KS | Pass | State |
| 2026-06-16 | TN GAS PIPELINE CO LLC - STATION 114 | CATLETTSBURG, Boyd, KY | Pass | State |
| 2026-06-16 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pass | State |
| 2026-06-16 | BILLERUD QUINNESEC LLC | QUINNESEC, Dickinson, MI | Pass | State |
| 2026-06-16 | GENERAL MOTORS LLC DETROIT-HAMTRAMCK ASSEMBLY | DETROIT, Wayne, MI | Pass | State |
| 2026-06-16 | KODA ENERGY, LLC — high-priority violation on file | SHAKOPEE, Scott, MN | Fail | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | EMERY SAPP AND SONS INC. - ASPHALT-PLANT 10 (PORT-0950) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-06-16 | KING ASPHALT, INC. - PINEVILLE PLANT | CHARLOTTE, Mecklenburg, NC | Pass | Local |
| 2026-06-16 | PABCO GYPSUM | LAS VEGAS, Clark, NV | Pass | Local |
| 2026-06-16 | ENBRIDGE GAS OHIO - NEW LYME COMPRESSOR STATION | JEFFERSON, Ashtabula, OH | Pass | State |
| 2026-06-16 | ENBRIDGE GAS OHIO - NEW LYME COMPRESSOR STATION | JEFFERSON, Ashtabula, OH | Pass | State |
| 2026-06-16 | ENBRIDGE GAS OHIO - NEW LYME COMPRESSOR STATION | JEFFERSON, Ashtabula, OH | Pass | State |
| 2026-06-16 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2026-06-16 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2026-06-16 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2026-06-16 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2026-06-16 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2026-06-16 | OHIO MIDSTREAM PARTNERS, LLC BUCKEYE COMPRESSOR STATION | POWHATAN POINT, Belmont, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA, LLC - CROSS CREEK A | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA, LLC - CROSS CREEK A | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA, LLC - CROSS CREEK A | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - DICKSON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - DICKSON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - DICKSON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | ASCENT RESOURCES - UTICA LLC - GORDON CRC JF | BLOOMINGDALE, Jefferson, OH | Pass | State |
| 2026-06-16 | LES RENEWABLE NG LLC - PIKE RNG | WAVERLY, Pike, OH | Pass | State |
| 2026-06-16 | GOLDEN EAGLE CONST CO/EIGHTY FOUR PLT | EIGHTY FOUR, Washington, PA | Pending | State |
| 2026-06-16 | ADVANSIX (FORMERLY HONEYWELL/FRANKFORD PLT) — high-priority violation on file | PHILADELPHIA, Philadelphia, PA | Pending | Local |
| 2026-06-16 | COPE STATION | COPE, Orangeburg, SC | Pass | State |
| 2026-06-16 | COPE STATION | COPE, Orangeburg, SC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.