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 |
|---|---|---|---|---|
| 2026-06-03 | ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file | FRANKFORT, Clinton, IN | Pass | State |
| 2026-06-03 | ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file | FRANKFORT, Clinton, IN | Pass | State |
| 2026-06-03 | ARCHER DANIELS MIDLAND COMPANY — high-priority violation on file | FRANKFORT, Clinton, IN | Pass | State |
| 2026-06-03 | ANCHOR GLASS CONTAINER CORPORATION — high-priority violation on file | LAWRENCEBURG, Dearborn, IN | Pass | State |
| 2026-06-03 | ANCHOR GLASS CONTAINER CORPORATION — high-priority violation on file | LAWRENCEBURG, Dearborn, IN | Pass | State |
| 2026-06-03 | GARFIELD FACILITY LLC — high-priority violation on file | MUNCIE, Delaware, IN | Pass | State |
| 2026-06-03 | GARFIELD FACILITY LLC — high-priority violation on file | MUNCIE, Delaware, IN | Pass | State |
| 2026-06-03 | GARFIELD FACILITY LLC — high-priority violation on file | MUNCIE, Delaware, IN | Pass | State |
| 2026-06-03 | UNIVERSAL BEARINGS LLC — high-priority violation on file | BREMEN, Marshall, IN | Pass | State |
| 2026-06-03 | UNIVERSAL BEARINGS LLC — high-priority violation on file | BREMEN, Marshall, IN | Pass | State |
| 2026-06-03 | UNIVERSAL BEARINGS LLC — high-priority violation on file | BREMEN, Marshall, IN | Pass | State |
| 2026-06-03 | UNIVERSAL BEARINGS LLC — high-priority violation on file | BREMEN, Marshall, IN | Pass | State |
| 2026-06-03 | MISSISSIPPI LIME CO - VERONA PLANT | VERONA, Gallatin, KY | Pass | State |
| 2026-06-03 | ST GOBAIN ABRASIVES, INC | WORCESTER, CITY OF, Worcester, MA | Pending | State |
| 2026-06-03 | ST GOBAIN ABRASIVES, INC | WORCESTER, CITY OF, Worcester, MA | Pending | State |
| 2026-06-03 | ST MARYS CEMENT U.S. LLC, CHARLEVOIX PLANT | CHARLEVOIX, Charlevoix, MI | Pass | State |
| 2026-06-03 | LOUISIANA-PACIFIC CORP SAGOLA PLANT | SAGOLA, Dickinson, MI | Pass | State |
| 2026-06-03 | HOLLAND BOARD OF PUBLIC WORKS-HOLLAND ENERGY PARK | HOLLAND, Ottawa, MI | Pass | State |
| 2026-06-03 | MAYMEAD, INC. - YANCEY PLANT | BURNSVILLE, Yancey, NC | Pending | State |
| 2026-06-03 | CASTLETON ENERGY CENTER | SCHODACK, Rensselaer, NY | Pass | State |
| 2026-06-03 | NEENAH NORTHEAST - LOWVILLE | LOWVILLE, Lewis, NY | Pass | State |
| 2026-06-03 | BASKIN LIVESTOCK | BATAVIA, Genesee, NY | Pass | State |
| 2026-06-03 | EOG RESOURCES, INC. - WILLIAMS CR MON PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-06-03 | EOG RESOURCES, INC. - WILLIAMS CR MON PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-06-03 | EOG RESOURCES, INC. - WILLIAMS CR MON PAD | CARROLLTON, Carroll, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | JOHNS MANVILLE / PLANT #01 - WTV1 | WATERVILLE, Lucas, OH | Pass | State |
| 2026-06-03 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-06-03 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-06-03 | ROTH PAD 952790 | WOODSFIELD, Monroe, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | SUBURBAN LANDFILL, INC. | GLENFORD, Perry, OH | Pass | State |
| 2026-06-03 | CARGILL, INC. - DAYTON | DAYTON, Montgomery, OH | Pass | State |
| 2026-06-03 | CARGILL, INC. - DAYTON | DAYTON, Montgomery, OH | Pass | State |
| 2026-06-03 | GEORGIA-PACIFIC TOLEDO LLC — high-priority violation on file | TOLEDO, Lincoln, OR | Pass | State |
| 2026-06-03 | LAUREL MTN MIDSTREAM OPR LLC/SHAMROCK COMP STA — high-priority violation on file | SALEM, Fayette, PA | Pass | State |
| 2026-06-03 | SOUTHWESTERN ENERGY CO/KOZIOL 5H-6H | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-06-03 | FRESHPET INC/BETHLEHEM | BETHLEHEM, Northampton, PA | Pass | State |
| 2026-06-03 | BOLLES COMPRESSOR STATION/JESSUP TWP | MONTROSE, Susquehanna, PA | Pass | State |
| 2026-06-03 | OTTER TAIL POWER COMPANY - ASTORIA STATION | ASTORIA, Deuel, SD | Pass | State |
| 2026-06-03 | DOMINION ENERGY - VIRGINIA CITY HYBRID ENERGY CENTER | ST PAUL, Wise, VA | Pass | State |
| 2026-06-03 | LANXESS CORPORATION — high-priority violation on file | KALAMA, Cowlitz, WA | Pass | Local |
| 2026-06-03 | CHARTER AARROWCAST | SHAWANO, Sheboygan, WI | Pass | State |
| 2026-06-03 | FALCON COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING COMPANY, LLC) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | FALCON COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING COMPANY, LLC) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | FALCON COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING COMPANY, LLC) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PINEDALE COMPLEX (HARVEST MIDSTREAM COMPANY) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-03 | PARADISE COMPRESSOR STATION (ENTERPRISE JONAH GAS GATHERING CO) | SUBLETTE COUNTY, Sublette, WY | Pass | State |
| 2026-06-02 | LOUISIANA-PACIFIC CORPORATION | HANCEVILLE, Cullman, AL | Pass | State |
| 2026-06-02 | WESTROCK COATED BOARD LLC-MAHRT MILL | PHENIX CITY, Russell, AL | Pass | State |
| 2026-06-02 | SUZANO PACKAGING, LLC | PINE BLUFF, Jefferson, AR | Pass | State |
| 2026-06-02 | SUZANO PACKAGING, LLC | PINE BLUFF, Jefferson, AR | Pass | State |
| 2026-06-02 | DESOTO GATHERING COMPANY, LLC - STEELHEAD CPF-3 | CLINTON, Van Buren, AR | Pass | State |
| 2026-06-02 | STAMFORD WPCA | STAMFORD, Fairfield, CT | Pass | State |
| 2026-06-02 | SABAL TRAIL TRANSMISSION, LLC | INTERCESSION CITY, Osceola, FL | Pass | State |
| 2026-06-02 | SABAL TRAIL TRANSMISSION, LLC | INTERCESSION CITY, Osceola, FL | Pass | State |
| 2026-06-02 | SABAL TRAIL TRANSMISSION, LLC | INTERCESSION CITY, Osceola, FL | Pass | State |
| 2026-06-02 | LAKELAND ELECTRIC | LAKELAND, Polk, FL | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.