EPA Air · stack tests by year
Air-emissions stack tests in 2026
- 15,218Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2026
- Ohio 1,887
- California 1,849
- Indiana 1,315
- New Mexico 1,112
- Florida 1,099
- Wyoming 903
- Georgia 693
- Pennsylvania 636
- Arkansas 481
- Alabama 445
- Missouri 433
- Texas 337
- Mississippi 332
- Michigan 270
- Colorado 255
- Iowa 250
- North Carolina 239
- Illinois 224
- Wisconsin 190
- South Carolina 165
- Kansas 151
- West Virginia 140
- Virginia 119
- Montana 115
- Idaho 114
- Utah 109
- Minnesota 108
- Delaware 107
- Tennessee 106
- Kentucky 97
- Connecticut 92
- Washington 87
- Arizona 83
- Massachusetts 78
- Nebraska 74
- North Dakota 72
- New York 67
- Nevada 61
- Alaska 47
- New Hampshire 38
- South Dakota 36
- Louisiana 35
- District of Columbia 30
- Maryland 29
- Oregon 28
- Hawaii 24
- Rhode Island 19
- Maine 16
- Oklahoma 15
- Puerto Rico 6
Other years
Air-emissions stack tests recorded in 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | HILLSBOROUGH CTY. RESOURCE RECOVERY FAC. | TAMPA, Hillsborough, FL | Pass | State |
| 2026-08-19 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2026-08-19 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2026-08-19 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2026-08-19 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2026-08-19 | ATLANTA GAS LIGHT CO. — high-priority violation on file | BALL GROUND, Cherokee, GA | Pass | State |
| 2026-08-19 | ATLANTA GAS LIGHT CO. — high-priority violation on file | BALL GROUND, Cherokee, GA | Pass | State |
| 2026-08-19 | TOYOTA INDUSTRIES COMPRESSOR PARTS AMERICA, CO. | PENDERGRASS, Jackson, GA | Pass | State |
| 2026-08-19 | J R SIMPLOT COMPANY-DON SIDING POCATELLO — high-priority violation on file | POCATELLO, Power, ID | Pending | State |
| 2026-08-19 | GASKA TAPE INCORPORATED | ELKHART, Elkhart, IN | Pass | State |
| 2026-08-19 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-08-19 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-08-19 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-08-19 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-08-19 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-08-19 | BP PRODUCTS NORTH AMERICA INC WHITING BUSINESS UNIT — high-priority violation on file | WHITING, Lake, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | HOWMET CASTINGS AND SERVICES INCORPORATED | LA PORTE, LaPorte, IN | Pass | State |
| 2026-08-19 | JELD WEN INCORPORATED — high-priority violation on file | LIGONIER, Noble, IN | Pass | State |
| 2026-08-19 | TATE & LYLE SOLUTIONS USA LLC — high-priority violation on file | LAFAYETTE, Tippecanoe, IN | Pass | State |
| 2026-08-19 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2026-08-19 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2026-08-19 | SPECIALTY MINERALS — high-priority violation on file | ADAMS, TOWN OF, Berkshire, MA | Pending | State |
| 2026-08-19 | MONOGRAM GOURMET WHOLESALE BAKERY, AKA WHOLE FOODS MARKETS BAKE HOUSE | MEDFORD, Middlesex, MA | Pending | State |
| 2026-08-19 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2026-08-19 | NATIONAL GALVANIZING HS PROCESSING LP | MONROE, Monroe, MI | Pass | State |
| 2026-08-19 | GENESEE POWER STATION LIMITED PARTNERSHIP | FLINT, Genesee, MI | Pass | State |
| 2026-08-19 | DTE ELECTRIC COMPANY - RENAISSANCE POWER PLANT | CARSON CITY, Montcalm, MI | Pass | State |
| 2026-08-19 | TOYOTA BATTERY MFG. INC. DBA TOYOTA BATTERY MANUFACTURING NC | LIBERTY, Randolph, NC | Pending | State |
| 2026-08-19 | BD PHARMACEUTICAL SYSTEMS | COLUMBUS, Platte, NE | N/A | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | ROVER PIPELINE - MAINLINE CS2 | WOOSTER, Wayne, OH | Pass | State |
| 2026-08-19 | KINDER MORGAN TENNESSEE GAS PIPELINE STATION 204 | ALBANY, Athens, OH | Pass | State |
| 2026-08-19 | KINDER MORGAN TENNESSEE GAS PIPELINE STATION 204 | ALBANY, Athens, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - TRUCHAN NE WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - TRUCHAN NE WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - TRUCHAN NE WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - SIDWELL WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - SIDWELL WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - SIDWELL WHL BL | SAINT CLAIRSVILLE, Belmont, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - VINCENT MTP JF | ADENA, Jefferson, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - VINCENT MTP JF | ADENA, Jefferson, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - VINCENT MTP JF | ADENA, Jefferson, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - KRINKE MTP JF | MOUNT PLEASANT, Jefferson, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - KRINKE MTP JF | MOUNT PLEASANT, Jefferson, OH | Pass | State |
| 2026-08-19 | ASCENT RESOURCES - UTICA LLC - KRINKE MTP JF | MOUNT PLEASANT, Jefferson, OH | Pass | State |
| 2026-08-19 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-08-19 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-08-19 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-08-19 | WILEY PAD 952982 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-08-19 | WILEY PAD 952982 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-08-19 | WILEY PAD 952982 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-08-19 | MAGNESITA REFRACTORIES/YORK — high-priority violation on file | YORK, York, PA | Pass | State |
| 2026-08-19 | US DOD/RAVEN ROCK MTN COMPLEX | BLUE RIDGE SUMMIT, Adams, PA | Pass | State |
| 2026-08-19 | FRESHPET INC/BETHLEHEM | BETHLEHEM, Northampton, PA | Pass | State |
| 2026-08-19 | WATEREE STATION | EASTOVER, Richland, SC | Pass | State |
| 2026-08-19 | REEVES CONSTRUCTION COMPANY - BLACKSBURG ASPHALT PLANT | BLACKSBURG, Cherokee, SC | Pass | State |
| 2026-08-19 | HANKOOK & COMPANY ES AMERICA CORP. — high-priority violation on file | CLARKSVILLE, Montgomery, TN | Pending | State |
| 2026-08-19 | TENNESSEE VALLEY AUTHORITY (TVA) - KINGSTON FOSSIL PLANT — high-priority violation on file | HARRIMAN, Roane, TN | Pass | State |
| 2026-08-19 | TENNESSEE OPERATIONS OF EASTMAN CHEMICAL COMPANY — high-priority violation on file | KINGSPORT, Sullivan, TN | Pending | State |
| 2026-08-19 | DOMINION ENERGY â FORT BELVOIR PRIVATIZATION | FORT BELVOIR, Fairfax, VA | Pending | State |
| 2026-08-19 | DOMINION ENERGY - VIRGINIA CITY HYBRID ENERGY CENTER | ST PAUL, Wise, VA | Pending | State |
| 2026-08-19 | C-P FLEXIBLE PACKAGING — high-priority violation on file | FOND DU LAC, Fond du Lac, WI | Pass | State |
| 2026-08-19 | CITY BREWING CO INC — high-priority violation on file | LA CROSSE, La Crosse, WI | Pass | State |
| 2026-08-19 | ANTERO MIDSTREAM LLC, MIDDLEBOURNE III | WICK, Tyler, WV | Pass | State |
| 2026-08-19 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-08-19 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-08-19 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-08-19 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-08-19 | CROSSBOW COMPRESSOR STATION (THUNDER CREEK GAS SERVICES, LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in 2026. It lists 11,110 stack tests recorded nationwide in 2026.