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 |
|---|---|---|---|---|
| 2026-02-28 | VAN DOO DAH 33 CTB 3 | MALAGA, Lea, NM | Pass | State |
| 2026-02-28 | UNIVERSITY OF NEW MEXICO-MAIN CAMPUS | ALBUQUERQUE, Bernalillo, NM | Pass | Local |
| 2026-02-28 | SWITCH LTD | LAS VEGAS, Clark, NV | Pass | Local |
| 2026-02-28 | SWITCH LTD | LAS VEGAS, Clark, NV | Pass | Local |
| 2026-02-28 | SWITCH LTD | LAS VEGAS, Clark, NV | Pass | Local |
| 2026-02-28 | SWITCH LTD | LAS VEGAS, Clark, NV | Pass | Local |
| 2026-02-28 | SWITCH LTD | LAS VEGAS, Clark, NV | Pass | Local |
| 2026-02-28 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | N/A | State |
| 2026-02-28 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | N/A | State |
| 2026-02-28 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | N/A | State |
| 2026-02-28 | EXXONMOBIL BEAUMONT REFINERY — high-priority violation on file | BEAUMONT, Jefferson, TX | N/A | State |
| 2026-02-28 | PORT ARTHUR REFINERY — high-priority violation on file | PORT ARTHUR, Jefferson, TX | Pass | State |
| 2026-02-27 | LHOIST NORTH AMERICA OF ALABAMA, LLC | CALERA, Shelby, AL | Pass | State |
| 2026-02-27 | KLEEN ENERGY SYSTEMS, LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2026-02-27 | JEA | JACKSONVILLE, Duval, FL | Pass | State |
| 2026-02-27 | JEA | JACKSONVILLE, Duval, FL | Pass | State |
| 2026-02-27 | MPLX TERMINALS LLC — high-priority violation on file | TAMPA, Hillsborough, FL | Pass | State |
| 2026-02-27 | MPLX TERMINALS LLC — high-priority violation on file | TAMPA, Hillsborough, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-27 | FLORIDA POWER & LIGHT (PMT) | PARRISH, Manatee, FL | Pass | State |
| 2026-02-27 | CUTRALE CITRUS JUICES USA, INC | AUBURNDALE, Polk, FL | Pass | State |
| 2026-02-27 | CUTRALE CITRUS JUICES USA, INC | AUBURNDALE, Polk, FL | Pass | State |
| 2026-02-27 | CENTERS FOR DISEASE CONTROL AND PREVENTION (CDC) | ATLANTA, DeKalb, GA | Pass | State |
| 2026-02-27 | NORTHWEST PIPELINE LLC SODA SPRINGS | GEORGETOWN, Bear Lake, ID | Pass | State |
| 2026-02-27 | CITY OF FORT WAYNE THREE RIVERS FILTRATION PLANT — high-priority violation on file | FORT WAYNE, Allen, IN | Pass | State |
| 2026-02-27 | CITY OF FORT WAYNE THREE RIVERS FILTRATION PLANT — high-priority violation on file | FORT WAYNE, Allen, IN | Pass | State |
| 2026-02-27 | AMERICAN SYNTHETIC RUBBER COMPANY — high-priority violation on file | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2026-02-27 | DOMINION ENERGY COVE POINT LNG, LP | LUSBY, Calvert, MD | Pass | State |
| 2026-02-27 | WEXFORD COUNTY LANDFILL | NORTHVILLE, Wexford, MI | Pass | State |
| 2026-02-27 | HF SINCLAIR NAVAJO REFINING LLC (ARTESIA) — high-priority violation on file | ARTESIA, Eddy, NM | Pass | State |
| 2026-02-27 | BURTON FLAT DEEP UNIT 35 FACILITY 1 | LA HUERTA, Eddy, NM | Pass | State |
| 2026-02-27 | ARENA ROJA 28 CTB 2 | JAL, Lea, NM | Pass | State |
| 2026-02-27 | ARENA ROJA 28 CTB 2 | JAL, Lea, NM | Pass | State |
| 2026-02-27 | OSWEGO HARBOR POWER | OSWEGO, Oswego, NY | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | USA WASTE GENEVA LANDFILL, INC. | GENEVA, Ashtabula, OH | Pass | State |
| 2026-02-27 | BOLLES SOUTH WELLPAD — high-priority violation on file | NEW MILFORD, Susquehanna, PA | Pass | State |
| 2026-02-27 | CNX MIDSTREAM OPR CO LLC/BELL POINT 2 M&R DEHYDRATION STA | APOLLO, Westmoreland, PA | Pass | State |
| 2026-02-27 | QUAIL RUN ENERGY PARTNERS | ODESSA, Ector, TX | Pass | State |
| 2026-02-27 | QUAIL RUN ENERGY PARTNERS | ODESSA, Ector, TX | Pass | State |
| 2026-02-27 | QUAIL RUN ENERGY PARTNERS | ODESSA, Ector, TX | Pass | State |
| 2026-02-27 | QUAIL RUN ENERGY PARTNERS | ODESSA, Ector, TX | Pass | State |
| 2026-02-27 | VANTAGE DATA CENTER VA3 LLC — high-priority violation on file | ASHBURN, Loudoun, VA | Fail | State |
| 2026-02-27 | UNIVERSITY OF VIRGINIA | CHARLOTTESVILLE, Charlottesville (city), VA | Pass | State |
| 2026-02-27 | GRAYMONT (WI) LLC — high-priority violation on file | SUPERIOR, Douglas, WI | Pass | State |
| 2026-02-27 | QUIKRETE CONSTRUCTION MATERIALS, LLC, QUIKRETE CEMENT — high-priority violation on file | MARTINSBURG, Berkeley, WV | Pass | State |
| 2026-02-27 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-27 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-27 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-27 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-27 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-27 | HATCHET COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2026-02-26 | HSAA | ENTERPRISE, Coffee, AL | Pass | State |
| 2026-02-26 | HIGH-PURITY SILICON AMERICA CORPORATION | THEODORE, Mobile, AL | Pass | State |
| 2026-02-26 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-26 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-26 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-26 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-26 | SANDERS LEAD CO | TROY, Pike, AL | Pass | State |
| 2026-02-26 | HARRELL'S COATING SOLUTIONS, LLC | SYLACAUGA, Talladega, AL | Pass | State |
| 2026-02-26 | GEORGIA-PACIFIC CROSSETT LLC | CROSSETT, Ashley, AR | Pass | State |
| 2026-02-26 | SOUTHWESTERN ELECTRIC POWER COMPANY D/B/A FLINT CREEK POWER PLANT | GENTRY, Benton, AR | Pass | State |
| 2026-02-26 | THE BRYCE COMPANY, LLC | SEARCY, White, AR | Pass | State |
| 2026-02-26 | APACHE NITROGEN PRODUCTS INC — high-priority violation on file | SAINT DAVID, Cochise, AZ | Pass | State |
| 2026-02-26 | PHOENIX CEMENT | CLARKDALE, Yavapai, AZ | Pass | State |
| 2026-02-26 | SACRAMENTO MUNICIPAL UTILITY DIST. FINANCING AUTHORITY DBA PROCTER GAMBLE POWER — high-priority violation on file | SACRAMENTO, Sacramento, CA | Fail | Local |
| 2026-02-26 | KLEEN ENERGY SYSTEMS, LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2026-02-26 | KLEEN ENERGY SYSTEMS, LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2026-02-26 | OLDCASTLE APG SOUTH | POMPANO BEACH, Broward, FL | Pass | State |
| 2026-02-26 | OLDCASTLE APG SOUTH | POMPANO BEACH, Broward, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | LEE COUNTY DEPT. OF SOLID WASTE MGT. | FORT MYERS, Lee, FL | Pass | State |
| 2026-02-26 | FLORIDA POWER & LIGHT (PMT) | PARRISH, Manatee, FL | Pass | State |
| 2026-02-26 | FLORIDA GAS TRANSMISSION COMPANY, LLC | MILTON, Santa Rosa, FL | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.