EPA Air · stack tests by year
Air-emissions stack tests in 2025
- 26,633Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2025
- California 5,448
- Ohio 2,217
- New Mexico 1,801
- Indiana 1,621
- Florida 1,425
- Wyoming 1,362
- Georgia 1,234
- Oklahoma 1,229
- Pennsylvania 957
- Missouri 772
- Alabama 693
- Mississippi 689
- Arkansas 619
- Iowa 500
- Colorado 405
- Kansas 404
- Michigan 387
- Texas 308
- North Carolina 276
- Illinois 264
- Washington 263
- Wisconsin 245
- Minnesota 238
- West Virginia 224
- Delaware 212
- South Carolina 210
- Kentucky 207
- Connecticut 178
- Utah 175
- Montana 174
- Virginia 170
- Tennessee 168
- Alaska 157
- North Dakota 152
- Nebraska 145
- Maine 131
- Louisiana 129
- New York 126
- Arizona 116
- Idaho 111
- Nevada 75
- New Hampshire 59
- Massachusetts 59
- Hawaii 58
- Oregon 56
- Maryland 51
- South Dakota 46
- Rhode Island 30
- District of Columbia 28
- Puerto Rico 14
- New Jersey 11
- Vermont 4
Other years
Air-emissions stack tests recorded in 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-09 | HUNT REFINING COMPANY | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2025-12-09 | HUNT REFINING COMPANY | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2025-12-09 | DESOTO GATHERING COMPANY, LLC - NEW QUITMAN CPF-3 | QUITMAN, Cleburne, AR | Pass | State |
| 2025-12-09 | DESOTO GATHERING COMPANY LLC - NEW QUITMAN CPF-4 | QUITMAN, Faulkner, AR | Pass | State |
| 2025-12-09 | SACRAMENTO MUNICIPAL UTILITY DIST. FINANCING AUTHORITY DBA CAMPBELL POWER PLANT | SACRAMENTO, Sacramento, CA | Pending | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2025-12-09 | SENTINEL PEAK RESOURCES CA LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-12-09 | BUCKEYE PT TERMINALS, L.P. - FORBES AVENUE TERMINAL | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-12-09 | TPSI TERMINALS LLC | FORT LAUDERDALE, Broward, FL | Pass | State |
| 2025-12-09 | CENTRAL MATERIALS COMPANY, INC. | LECANTO, Citrus, FL | Pass | State |
| 2025-12-09 | KRAFT HEINZ FOODS COMPANY | JACKSONVILLE, Duval, FL | Pass | State |
| 2025-12-09 | ENVIROFOCUS TECHNOLOGIES DBA GOPHER RESO — high-priority violation on file | TAMPA, Hillsborough, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | SUGAR CANE GROWERS CO-OP | BELLE GLADE, Palm Beach, FL | Pass | State |
| 2025-12-09 | CERTAINTEED GYPSUM PALATKA, LLC | PALATKA, Putnam, FL | Pass | State |
| 2025-12-09 | ATHENS-CLARKE COUNTY MSW LANDFILL | WINTERVILLE, Clarke, GA | Pass | State |
| 2025-12-09 | ATHENS-CLARKE COUNTY MSW LANDFILL | WINTERVILLE, Clarke, GA | Pass | State |
| 2025-12-09 | ATHENS-CLARKE COUNTY MSW LANDFILL | WINTERVILLE, Clarke, GA | Pass | State |
| 2025-12-09 | CII METHANE MANAGEMENT III LANDFILL GAS TO ENERGY PROJECT | ATHENS, Clarke, GA | Pass | State |
| 2025-12-09 | CII METHANE MANAGEMENT III LANDFILL GAS TO ENERGY PROJECT | ATHENS, Clarke, GA | Pass | State |
| 2025-12-09 | CII METHANE MANAGEMENT III LANDFILL GAS TO ENERGY PROJECT | ATHENS, Clarke, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | TALBOT ENERGY FACILITY | BOX SPRINGS, Talbot, GA | Pass | State |
| 2025-12-09 | ACTIVE MINERALS INTERNATIONAL - MAIN PLANT | GORDON, Wilkinson, GA | Pass | State |
| 2025-12-09 | CARGILL INC-IOWA FALLS | IOWA FALLS, Hardin, IA | Pass | State |
| 2025-12-09 | MICRON TECHNOLOGY INC BOISE | BOISE, Ada, ID | Pass | State |
| 2025-12-09 | WEST POINT RNG LLC | WENDELL, Gooding, ID | Pass | State |
| 2025-12-09 | GRAIN CRAFT CORN LLC — high-priority violation on file | DANVILLE, Vermilion, IL | Fail | State |
| 2025-12-09 | GRAIN CRAFT CORN LLC — high-priority violation on file | DANVILLE, Vermilion, IL | Fail | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | CARDINAL ETHANOL LLC — high-priority violation on file | UNION CITY, Randolph, IN | Pass | State |
| 2025-12-09 | EVONIK CORP - HAYSVILLE (AIR) | HAYSVILLE, Sedgwick, KS | Pass | State |
| 2025-12-09 | EVONIK CORP - HAYSVILLE (AIR) | HAYSVILLE, Sedgwick, KS | Pass | State |
| 2025-12-09 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-12-09 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-12-09 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-12-09 | HARSHMAN CONST (MASTER EQUIP LIST) (AIR) | CEDAR POINT, Marion, KS | Pass | State |
| 2025-12-09 | DOW SILICONES CORP | CARROLLTON, Carroll, KY | Fail | State |
| 2025-12-09 | DART CONTAINER CORP OF KY | HORSE CAVE, Hart, KY | Pass | State |
| 2025-12-09 | DART CONTAINER CORP OF KY | HORSE CAVE, Hart, KY | Pass | State |
| 2025-12-09 | CF INDUSTRIES NITROGEN LLC - DONALDSONVILLE NITROGEN COMPLEX | DONALDSONVILLE, Ascension, LA | Pass | State |
| 2025-12-09 | CITY OF AUGUSTA - HATCH HILL LANDFILL | AUGUSTA, Kennebec, ME | Pass | State |
| 2025-12-09 | SAPPI NORTH AMERICA, INC. | SKOWHEGAN, Somerset, ME | Pass | State |
| 2025-12-09 | SAPPI NORTH AMERICA, INC. | SKOWHEGAN, Somerset, ME | Pass | State |
| 2025-12-09 | ANR PIPELINE COMPANY LINCOLN COMPRESSOR STATION | LAKE GEORGE, Clare, MI | Pass | State |
| 2025-12-09 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2025-12-09 | SILGAN CONTAINERS MFG CORP | SAVAGE, Scott, MN | Pass | State |
| 2025-12-09 | PRECOAT METALS | WASHINGTON, Franklin, MO | Pending | State |
| 2025-12-09 | PRECOAT METALS | WASHINGTON, Franklin, MO | Pending | State |
| 2025-12-09 | NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER | STENNIS SPAC, Hancock, MS | Pass | State |
| 2025-12-09 | NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, JOHN C STENNIS SPACE CENTER | STENNIS SPAC, Hancock, MS | Pass | State |
| 2025-12-09 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-09 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-09 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-09 | AMAZON DATA SERVICES INC, MADISON MEGA SITE — high-priority violation on file | CANTON, Madison, MS | Pass | State |
| 2025-12-09 | GEORGIA PACIFIC WOOD PRODUCTS LLC, TAYLORSVILLE | TAYLORSVILLE, Smith, MS | Pass | State |
| 2025-12-09 | IREDELL TRANSMISSION, LLC | STATESVILLE, Iredell, NC | Pass | State |
| 2025-12-09 | BITTER LAKE COMPRESSOR STATION | ROSWELL, Chaves, NM | Pass | State |
| 2025-12-09 | BITTER LAKE COMPRESSOR STATION | ROSWELL, Chaves, NM | Pass | State |
| 2025-12-09 | WILDCAT COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-12-09 | WILDCAT COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2025-12-09 | WELCOME TO GOLDEN | MALAGA, Eddy, NM | Pass | State |
| 2025-12-09 | WELCOME TO GOLDEN | MALAGA, Eddy, NM | Pass | State |
| 2025-12-09 | DEEP FLAT BOOSTER STATION | AVALON, Eddy, NM | Pass | State |
| 2025-12-09 | IRVIN WALL STATE COM NO131H | JAL, Lea, NM | Pass | State |
| 2025-12-09 | KRAKEN COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-12-09 | HOGNOSE VIPER 23 CTB 1 | EUNICE, Lea, NM | Pass | State |
| 2025-12-09 | GOLD QUARRY OPERATIONS — high-priority violation on file | CARLIN, Eureka, NV | Pass | State |
| 2025-12-09 | JOHNS MANVILLE | DEFIANCE, Defiance, OH | Pass | State |
| 2025-12-09 | ASCENT RESOURCES - UTICA LLC - FALDOWSKI SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-12-09 | ASCENT RESOURCES - UTICA LLC - FALDOWSKI SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-12-09 | ASCENT RESOURCES - UTICA LLC - FALDOWSKI SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-12-09 | ASCENT RESOURCES - UTICA LLC - LORI SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-12-09 | ASCENT RESOURCES - UTICA LLC - LORI SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-12-09 | ASCENT RESOURCES - UTICA LLC - LORI SMF JF | DILLONVALE, Jefferson, OH | Pass | State |
| 2025-12-09 | P AND K STONE LLC / COLEMAN QUARRY | COLEMAN, Atoka, OK | Pass | State |
| 2025-12-09 | CUMMINGS LUMBER CO INC/TROY TWP PLT | TROY, Bradford, PA | Pass | State |
| 2025-12-09 | CALPINE MID MERIT II LLC/ YORK ENERGY CENTER BLOCK 2 — high-priority violation on file | DELTA, York, PA | Pass | State |
| 2025-12-09 | EQM GATHERING OPCO LLC/PIPERS RIDGE INTERCONNECT | WAYNESBURG, Greene, PA | Pass | State |
| 2025-12-09 | PA GEN ENERGY CO LLC/TRACT 729 COMPRESSOR STATION | WATERVILLE, Lycoming, PA | 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 and stack tests in 2025. It lists 26,291 stack tests recorded nationwide in 2025.