EPA Air · stack tests by year
Air-emissions stack tests in 2025
- 26,291Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2025
- California 5,390
- Ohio 2,213
- New Mexico 1,801
- Indiana 1,619
- Florida 1,419
- Wyoming 1,362
- Georgia 1,233
- Oklahoma 1,229
- Pennsylvania 951
- Missouri 768
- Alabama 693
- Mississippi 688
- Arkansas 619
- Iowa 500
- Colorado 405
- Michigan 387
- Texas 308
- North Carolina 275
- Illinois 264
- Washington 251
- Wisconsin 245
- Minnesota 238
- West Virginia 224
- Delaware 212
- South Carolina 210
- Kentucky 204
- Kansas 202
- Connecticut 178
- Utah 175
- Montana 174
- Virginia 170
- Tennessee 168
- Alaska 152
- Nebraska 145
- North Dakota 143
- Maine 131
- New York 124
- Louisiana 117
- Arizona 116
- Idaho 111
- Nevada 73
- New Hampshire 59
- Massachusetts 59
- Oregon 56
- Hawaii 53
- Maryland 51
- South Dakota 46
- Rhode Island 30
- District of Columbia 28
- Puerto Rico 14
- Vermont 4
- New Jersey 4
Other years
Air-emissions stack tests recorded in 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-10-30 | AHLSTROM NONWOVENS, LLC | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2025-10-30 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-10-30 | HANWHA ADVANCED MATERIALS GEORGIA, INC. — high-priority violation on file | WHITE, Bartow, GA | Pass | State |
| 2025-10-30 | HANWHA ADVANCED MATERIALS GEORGIA, INC. — high-priority violation on file | WHITE, Bartow, GA | Pass | State |
| 2025-10-30 | HANWHA ADVANCED MATERIALS GEORGIA, INC. — high-priority violation on file | WHITE, Bartow, GA | Pass | State |
| 2025-10-30 | HANWHA ADVANCED MATERIALS GEORGIA, INC. — high-priority violation on file | WHITE, Bartow, GA | Pass | State |
| 2025-10-30 | INTERNATIONAL PAPER - FLINT RIVER MILL | OGLETHORPE, Macon, GA | Pass | State |
| 2025-10-30 | INTERNATIONAL PAPER - FLINT RIVER MILL | OGLETHORPE, Macon, GA | Pass | State |
| 2025-10-30 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2025-10-30 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2025-10-30 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2025-10-30 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2025-10-30 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2025-10-30 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2025-10-30 | KEYSTONE AUTOMOTIVE INDUSTRIES DBA TRANSWHEEL — high-priority violation on file | HUNTINGTON, Huntington, IN | Pass | State |
| 2025-10-30 | KEYSTONE AUTOMOTIVE INDUSTRIES DBA TRANSWHEEL — high-priority violation on file | HUNTINGTON, Huntington, IN | Pass | State |
| 2025-10-30 | KEYSTONE AUTOMOTIVE INDUSTRIES DBA TRANSWHEEL — high-priority violation on file | HUNTINGTON, Huntington, IN | Pass | State |
| 2025-10-30 | KEYSTONE AUTOMOTIVE INDUSTRIES DBA TRANSWHEEL — high-priority violation on file | HUNTINGTON, Huntington, IN | Pass | State |
| 2025-10-30 | MIDWEST PIPE COATING | SCHERERVILLE, Lake, IN | Pass | State |
| 2025-10-30 | MIDWEST PIPE COATING | SCHERERVILLE, Lake, IN | Pass | State |
| 2025-10-30 | MIDWEST PIPE COATING | SCHERERVILLE, Lake, IN | Pass | State |
| 2025-10-30 | MIDWEST PIPE COATING | SCHERERVILLE, Lake, IN | Pass | State |
| 2025-10-30 | JUPITER ALUMINUM CORPORATION — high-priority violation on file | HAMMOND, Lake, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | CWA AUTHORITY INC BELMONT ADV WASTEWATER TREATMENT PLANT | INDIANAPOLIS, Marion, IN | Pass | State |
| 2025-10-30 | AMERICAN SYNTHETIC RUBBER COMPANY — high-priority violation on file | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2025-10-30 | AMERICAN SYNTHETIC RUBBER COMPANY — high-priority violation on file | LOUISVILLE, Jefferson, KY | Incomplete | Local |
| 2025-10-30 | WARREN WASTE WATER TREATMENT PLANT | WARREN, Macomb, MI | Pass | State |
| 2025-10-30 | AMRIZE MIDWEST INC - NONMETALLIC | EAGAN, Dakota, MN | Pass | State |
| 2025-10-30 | GUARDIAN ENERGY LLC | JANESVILLE, Waseca, MN | Pass | State |
| 2025-10-30 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Fail | State |
| 2025-10-30 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-10-30 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-10-30 | CLARIOS, LLC | SAINT JOSEPH, Buchanan, MO | Pass | State |
| 2025-10-30 | URSA FARMERS COOPERATIVE | WAYLAND, Clark, MO | Pass | State |
| 2025-10-30 | URSA FARMERS COOPERATIVE | WAYLAND, Clark, MO | Pass | State |
| 2025-10-30 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 1 | SPRINGFIELD, Greene, MO | Pass | State |
| 2025-10-30 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 1 | SPRINGFIELD, Greene, MO | Pass | State |
| 2025-10-30 | ENERSYS ENERGY PRODUCTS INC - SPRINGFIELD 1 | SPRINGFIELD, Greene, MO | Pass | State |
| 2025-10-30 | GENERAL MOTORS LLC | WENTZVILLE, St. Charles, MO | N/A | State |
| 2025-10-30 | GENERAL MOTORS LLC | WENTZVILLE, St. Charles, MO | N/A | State |
| 2025-10-30 | GENERAL MOTORS LLC | WENTZVILLE, St. Charles, MO | N/A | State |
| 2025-10-30 | GENERAL MOTORS LLC | WENTZVILLE, St. Charles, MO | N/A | State |
| 2025-10-30 | GENERAL MOTORS LLC | WENTZVILLE, St. Charles, MO | N/A | State |
| 2025-10-30 | GENERAL MOTORS LLC | WENTZVILLE, St. Charles, MO | N/A | State |
| 2025-10-30 | 3M NEVADA-COMMERCIAL GRAPHICS | NEVADA, Vernon, MO | Pass | State |
| 2025-10-30 | 3M NEVADA-COMMERCIAL GRAPHICS | NEVADA, Vernon, MO | Pass | State |
| 2025-10-30 | 3M NEVADA-COMMERCIAL GRAPHICS | NEVADA, Vernon, MO | Pass | State |
| 2025-10-30 | 3M NEVADA-COMMERCIAL GRAPHICS | NEVADA, Vernon, MO | Pass | State |
| 2025-10-30 | 3M NEVADA-COMMERCIAL GRAPHICS | NEVADA, Vernon, MO | Pass | State |
| 2025-10-30 | 3M NEVADA-COMMERCIAL GRAPHICS | NEVADA, Vernon, MO | Pass | State |
| 2025-10-30 | CENTRAL STONE- CS - 66 | POTOSI, Washington, MO | Pass | State |
| 2025-10-30 | CENTRAL STONE- CS - 66 | POTOSI, Washington, MO | Pass | State |
| 2025-10-30 | CENTRAL STONE- CS - 66 | POTOSI, Washington, MO | Pass | State |
| 2025-10-30 | CENTRAL STONE- CS - 66 | POTOSI, Washington, MO | Pass | State |
| 2025-10-30 | CENTRAL STONE- CS - 66 | POTOSI, Washington, MO | Pass | State |
| 2025-10-30 | CENTRAL STONE- CS - 66 | POTOSI, Washington, MO | Pass | State |
| 2025-10-30 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2025-10-30 | EP ENGINEERED CLAYS CORPORATION — high-priority violation on file | JACKSON, Hinds, MS | Pass | State |
| 2025-10-30 | FALLS CITY POWER PLANT — high-priority violation on file | FALLS CITY, Richardson, NE | Pass | State |
| 2025-10-30 | BAY MEADOWS COMPRESSOR STATION | WHITES CITY, Eddy, NM | Pass | State |
| 2025-10-30 | OXY SAND DUNES SOUTH COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-10-30 | TIGER BOOSTER STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2025-10-30 | TIGER BOOSTER STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2025-10-30 | CEDAR FED TB — high-priority violation on file | LOCO HILLS, Eddy, NM | Pass | State |
| 2025-10-30 | OVER THE LINE COMPRESSOR STATION | MONUMENT, Lea, NM | Pass | State |
| 2025-10-30 | ET GATHERING PROCESSING LLC / BOBCAT COMPRESSOR STATION | HYDRO, Blaine, OK | Pass | State |
| 2025-10-30 | INTER POWER AHLCON LP/COLVER POWER PROJ — high-priority violation on file | COLVER, Cambria, PA | Pass | State |
| 2025-10-30 | NEXTERA RENEWABLE FUELS LLC/FREY FARM CRESWELL LDFL | CONESTOGA, Lancaster, PA | Pass | State |
| 2025-10-30 | BRIGHTSMITH LLC/FALLS TWP | MORRISVILLE, Bucks, PA | Pass | State |
| 2025-10-30 | ALGONQUIN GAS TRANSMISSION LINE | BURRILLVILLE, TOWN OF, Providence, RI | Pass | State |
| 2025-10-30 | CHINA JUSHI USA CORPORATION — high-priority violation on file | COLUMBIA, Richland, SC | Pass | State |
| 2025-10-30 | TENNESSEE OPERATIONS OF EASTMAN CHEMICAL COMPANY — high-priority violation on file | KINGSPORT, Sullivan, TN | Pass | State |
| 2025-10-30 | DTE STANTON, LLC | STANTON, Haywood, TN | Pass | State |
| 2025-10-30 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2025-10-30 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2025-10-30 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2025-10-30 | ZAYO GROUP, LLC | ASHBURN, Loudoun, VA | Pass | State |
| 2025-10-30 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2025-10-30 | KAISER ALUMINUM WASHINGTON, LLC | SPOKANE, Spokane, WA | Fail | Local |
| 2025-10-30 | JONATHON LIME PLANT & LIME KILN DUST LANDFILL (PETE LIEN & SONS INC) | ALBANY COUNTY, Albany, WY | Pass | State |
| 2025-10-29 | WESTROCK COMPANY, LLC | STEVENSON, Jackson, AL | Pass | State |
| 2025-10-29 | WESTROCK COMPANY, LLC | STEVENSON, Jackson, AL | Pass | State |
| 2025-10-29 | BASF CORPORATION | HUNTSVILLE, Madison, AL | Pass | Local |
| 2025-10-29 | POTLATCHDELTIC MANUFACTURING LLC - WALDO LUMBER MILL | WALDO, Columbia, AR | Pass | State |
| 2025-10-29 | MMGK ARKOMA, LLC. - KIBLER COMPRESSOR | KIBLER, Crawford, AR | Pass | State |
| 2025-10-29 | MERIT ENERGY COMPANY, LLC - PRICE COMPRESSOR | RUSSELLVILLE, Pope, AR | Pass | State |
| 2025-10-29 | WELLHEAD POWER PANOCHE, LLC — high-priority violation on file | FIREBAUGH, Fresno, CA | Pass | Local |
| 2025-10-29 | WELLHEAD POWER PANOCHE, LLC — high-priority violation on file | FIREBAUGH, Fresno, CA | Pass | Local |
| 2025-10-29 | WELLHEAD POWER PANOCHE, LLC — high-priority violation on file | FIREBAUGH, Fresno, CA | Pass | Local |
| 2025-10-29 | WELLHEAD POWER PANOCHE, LLC — high-priority violation on file | FIREBAUGH, Fresno, CA | Pass | Local |
| 2025-10-29 | WELLHEAD POWER PANOCHE, LLC — high-priority violation on file | FIREBAUGH, Fresno, CA | Pass | Local |
| 2025-10-29 | WELLHEAD POWER PANOCHE, LLC — high-priority violation on file | FIREBAUGH, Fresno, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.