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 |
|---|---|---|---|---|
| 2026-09-09 | GEORGIA-PACIFIC WOOD PRODUCTS LLC - DUDLEY PLYWOOD/CNS | DUDLEY, Wayne, NC | Pending | State |
| 2026-09-08 | BONANZA CRK STATE NORTH PLATTE CPF 42-26 | KERSEY 7.1 MI. N OF, Weld, CO | Pending | State |
| 2026-09-02 | DCP OPERATING CO - CROSSROADS FACILITY | KERSEY 5.0 MI. N OF, Weld, CO | Pending | State |
| 2026-09-01 | DOMINION/ODEC - CLOVER POWER STATION — high-priority violation on file | CLOVER, Halifax, VA | Pending | State |
| 2026-08-31 | AREA 72 CGP FACILITY | YORKTOWN, DeWitt, TX | Pass | State |
| 2026-08-31 | WESTROCK TEXAS | EVADALE, Jasper, TX | Pass | State |
| 2026-08-31 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-31 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-31 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-31 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-31 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-31 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Fail | State |
| 2026-08-31 | CRP B CDP NO 2 COMPRESSOR STATION | RUNGE, Karnes, TX | Pass | State |
| 2026-08-31 | CRP B CDP NO 2 COMPRESSOR STATION | RUNGE, Karnes, TX | Pass | State |
| 2026-08-31 | FORNEY POWER PLANT | FORNEY, Kaufman, TX | Pass | State |
| 2026-08-31 | FORNEY POWER PLANT | FORNEY, Kaufman, TX | Pass | State |
| 2026-08-31 | FORNEY POWER PLANT | FORNEY, Kaufman, TX | Pass | State |
| 2026-08-31 | FORNEY POWER PLANT | FORNEY, Kaufman, TX | Pass | State |
| 2026-08-31 | FORNEY POWER PLANT | FORNEY, Kaufman, TX | Pass | State |
| 2026-08-31 | FORNEY POWER PLANT | FORNEY, Kaufman, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-31 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-30 | BAYPORT POLYMERS | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-30 | BAYPORT POLYMERS | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-30 | BAYPORT POLYMERS | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-30 | EAST LONGHORN CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2026-08-30 | EAST LONGHORN CENTRAL FACILITY | KARNES CITY, Karnes, TX | Pass | State |
| 2026-08-29 | WATEREE STATION | EASTOVER, Richland, SC | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | Pass | State |
| 2026-08-28 | BRIDGEPORT GAS PLANT | BRIDGEPORT, Wise, TX | Pass | State |
| 2026-08-28 | DOMINION ENERGY - ALTAVISTA POWER STATION | ALTAVISTA, Campbell, VA | Pending | State |
| 2026-08-27 | CARGILL, INC. - FAYETTEVILLE — high-priority violation on file | FAYETTEVILLE, Cumberland, NC | Pending | State |
| 2026-08-27 | SOUTHERN PRODUCTS & SILICA COMPANY — high-priority violation on file | HOFFMAN, Richmond, NC | Pending | State |
| 2026-08-27 | PORT NECHES OPERATIONS — high-priority violation on file | PORT NECHES, Jefferson, TX | Fail | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Pass | State |
| 2026-08-27 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-26 | EGGER - LEXINGTON PARTICLEBOARD PLANT — high-priority violation on file | LINWOOD, Davidson, NC | Pending | State |
| 2026-08-26 | DARTMOUTH PRINTING COMPANY | HANOVER, Grafton, NH | Pending | State |
| 2026-08-26 | BRIDGEPORT GAS PLANT | BRIDGEPORT, Wise, TX | Pass | State |
| 2026-08-26 | BRIDGEPORT GAS PLANT | BRIDGEPORT, Wise, TX | Pass | State |
| 2026-08-25 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2026-08-25 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2026-08-25 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2026-08-25 | ALPHA RIDGE LANDFILL | MARRIOTTSVILLE, Howard, MD | Pending | State |
| 2026-08-25 | GLENWOOD COMBUSTION TURBINE FACILITY | GLENWOOD LANDING, Nassau, NY | Pass | State |
| 2026-08-25 | C R JACKSON INC - VARNVILLE ASPHALT PLANT — high-priority violation on file | VARNVILLE, Hampton, SC | Pass | State |
| 2026-08-25 | CORRIGAN OSB — high-priority violation on file | CORRIGAN, Polk, TX | Fail | State |
| 2026-08-24 | BAXTER HEALTHCARE OF PUERTO RICO | JAYUYA, Jayuya, PR | Pass | U.S. EPA |
| 2026-08-24 | C R JACKSON INC - BATESBURG ASPHALT PLANT | BATESBURG - LEESVILLE, Lexington, SC | Pending | State |
| 2026-08-24 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | N/A | State |
| 2026-08-24 | PEARSALL POWER PLANT | PEARSALL, Frio, TX | N/A | State |
| 2026-08-24 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-24 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-24 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-24 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-24 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-24 | BEAUMONT CHEMICAL PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-22 | GUAJILLO CENTRAL FACILITY | WHITSETT, Atascosa, TX | Pass | State |
| 2026-08-21 | HK CONTRACTORS INC 00079 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS INC 00121 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS INC 00168 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS 00413 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS INC 00463 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS INC 00480 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS 00495 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | HK CONTRACTORS, INC. - 00739 | IDAHO FALLS, Bonneville, ID | Pending | State |
| 2026-08-21 | AMO PUERTO RICO MANUFACTURING, INC. | ANASCO, Anasco, PR | Pass | U.S. EPA |
| 2026-08-21 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-21 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-21 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-21 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-21 | ARKEMA BEAUMONT PLANT | BEAUMONT, Jefferson, TX | Pass | State |
| 2026-08-21 | CHEVRON PHILLIPS CHEMICAL PORT ARTHUR FACILITY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-08-21 | SILVER CREEK PROCESSING PLANT | WEATHERFORD, Parker, TX | Pass | State |
| 2026-08-21 | CHICO GAS PLANT | CHICO, Wise, TX | Pass | State |
| 2026-08-21 | JUSTIN WEST COMPRESSOR STATION | NEW FAIRVIEW, Wise, TX | Pass | State |
| 2026-08-20 | DESOTO GATHERING COMPANY, LLC - SW GREER LAKE CPF-2 | BEE BRANCH, Van Buren, AR | Pass | State |
| 2026-08-20 | DESOTO GATHERING COMPANY, LLC - SW GREER LAKE CPF-2 | BEE BRANCH, Van Buren, AR | Pass | State |
| 2026-08-20 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pending | State |
| 2026-08-20 | COOPERVISION MANUFACTURING PUERTO RICO LLC | JUANA DIAZ, Juana Diaz, PR | Pass | U.S. EPA |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.