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 |
|---|---|---|---|---|
| 2025-11-04 | STERICYCLE, INC | APOPKA, Orange, FL | Pass | State |
| 2025-11-04 | STERICYCLE, INC | APOPKA, Orange, FL | Pass | State |
| 2025-11-04 | STERICYCLE, INC | APOPKA, Orange, FL | Pass | State |
| 2025-11-04 | STERICYCLE, INC | APOPKA, Orange, FL | Pass | State |
| 2025-11-04 | STERICYCLE, INC | APOPKA, Orange, FL | Pass | State |
| 2025-11-04 | STERICYCLE, INC | APOPKA, Orange, FL | Pass | State |
| 2025-11-04 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2025-11-04 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2025-11-04 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2025-11-04 | DUKE ENERGY FLORIDA, LLC | DE BARY-ORANGE CITY DIVISION, Volusia, FL | Pass | State |
| 2025-11-04 | ARCH WOOD PROTECTION, INC. — high-priority violation on file | CONLEY, DeKalb, GA | Pass | State |
| 2025-11-04 | ARCH WOOD PROTECTION, INC. — high-priority violation on file | CONLEY, DeKalb, GA | Pass | State |
| 2025-11-04 | MECO - MAALAEA | MAALAEA, Maui, HI | Pass | State |
| 2025-11-04 | JOHN DEERE PRODUCT ENGINEERING CENTER | CEDAR FALLS, Black Hawk, IA | Pass | State |
| 2025-11-04 | JOHN DEERE PRODUCT ENGINEERING CENTER | CEDAR FALLS, Black Hawk, IA | Pass | State |
| 2025-11-04 | HESS PUMICE PRODUCTS INC | MALAD CITY, Oneida, ID | Fail | State |
| 2025-11-04 | STARPLUS ENERGY LLC | KOKOMO, Howard, IN | Pass | State |
| 2025-11-04 | STARPLUS ENERGY LLC | KOKOMO, Howard, IN | Pass | State |
| 2025-11-04 | STARPLUS ENERGY LLC | KOKOMO, Howard, IN | Pass | State |
| 2025-11-04 | STARPLUS ENERGY LLC | KOKOMO, Howard, IN | Pass | State |
| 2025-11-04 | STARPLUS ENERGY LLC | KOKOMO, Howard, IN | Pass | State |
| 2025-11-04 | STARPLUS ENERGY LLC | KOKOMO, Howard, IN | Pass | State |
| 2025-11-04 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2025-11-04 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2025-11-04 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2025-11-04 | VALERO RENEWABLE FUELS COMPANY LLC DBA VALERO BLUFFTON PLANT | BLUFFTON, Wells, IN | Pass | State |
| 2025-11-04 | SAPPI NORTH AMERICA, INC. | SKOWHEGAN, Somerset, ME | Pass | State |
| 2025-11-04 | MICHIGAN SUGAR COMPANY, CROSWELL FACTORY — high-priority violation on file | CROSWELL, Sanilac, MI | Pass | State |
| 2025-11-04 | ANR PIPELINE-COLD SPRINGS12 /BLUE LAKE/ COLD SPRINGS 1 | MANCELONA, Kalkaska, MI | Pass | State |
| 2025-11-04 | NYLOK LLC — high-priority violation on file | MACOMB, Macomb, MI | Pass | State |
| 2025-11-04 | POET BIOREFINING - CARO, LLC | CARO, Tuscola, MI | Pass | State |
| 2025-11-04 | AMERICAN CRYSTAL SUGAR - MOORHEAD — high-priority violation on file | MOORHEAD, Clay, MN | Fail | State |
| 2025-11-04 | VEOLIA WTS SOLUTIONS USA INC | MINNETONKA, Hennepin, MN | Pass | State |
| 2025-11-04 | HERON LAKE BIOENERGY LLC | HERON LAKE, Jackson, MN | Pass | State |
| 2025-11-04 | SPRUCE RIDGE INC | GLENCOE, McLeod, MN | N/A | State |
| 2025-11-04 | BADGER FOUNDRY COMPANY | WINONA, Winona, MN | Pass | State |
| 2025-11-04 | CONCORD ENERGY, LLC | CONCORD, Cabarrus, NC | Pending | State |
| 2025-11-04 | TARGA BADLANDS, LLC - LITTLE MISSOURI GAS PLANT (LMGP) AND SMOKEY COMPRESSOR STA | WATFORD CITY, McKenzie, ND | N/A | State |
| 2025-11-04 | TARGA BADLANDS, LLC - LITTLE MISSOURI GAS PLANT (LMGP) AND SMOKEY COMPRESSOR STA | WATFORD CITY, McKenzie, ND | N/A | State |
| 2025-11-04 | OPPD NEBRASKA CITY STATION | NEBRASKA CITY, Otoe, NE | Pass | State |
| 2025-11-04 | GORHAM ACQUISITION, LLC — high-priority violation on file | GORHAM, Coos, NH | Pass | State |
| 2025-11-04 | GARRETT FED COM FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2025-11-04 | TATER TOT 2 CTB 5 | MALAGA, Eddy, NM | Pass | State |
| 2025-11-04 | TATER TOT 2 CTB 5 | MALAGA, Eddy, NM | Pass | State |
| 2025-11-04 | TATER TOT 2 CTB 5 | MALAGA, Eddy, NM | Pass | State |
| 2025-11-04 | PHOENIX COMPRESSOR STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2025-11-04 | PHOENIX COMPRESSOR STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2025-11-04 | WAYNE GAYLORD TB | LA HUERTA, Eddy, NM | Pass | State |
| 2025-11-04 | RED HILLS COMPRESSOR STATION | BENNETT, Lea, NM | Pass | State |
| 2025-11-04 | RED HILLS COMPRESSOR STATION | BENNETT, Lea, NM | Pass | State |
| 2025-11-04 | EOG - ALADDIN COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-04 | WOOL HEAD CENTRAL TB | EUNICE, Lea, NM | Pass | State |
| 2025-11-04 | SUPREME COMPRESSOR STATION | MALAGA, Lea, NM | Pass | State |
| 2025-11-04 | COBRA COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-04 | COBRA COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2025-11-04 | GOLD QUARRY OPERATIONS — high-priority violation on file | CARLIN, Eureka, NV | Pass | State |
| 2025-11-04 | WOODHULL STATION & POOL | WOODHULL, Steuben, NY | Pass | State |
| 2025-11-04 | SHELLY MATERIALS PLANT # 4132 — high-priority violation on file | TOLEDO, Lucas, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | BLUE RACER MIDSTREAM, LLC - BORTON STATION | QUAKER CITY, Guernsey, OH | Pass | State |
| 2025-11-04 | MARKWEST OKLAHOMA GAS CO LLC / KINGFISHER COMPRESSOR STATION | KINGFISHER, Kingfisher, OK | Pass | State |
| 2025-11-04 | PEOPLES GAS CO LLC/KINTER STA | INDIANA, Indiana, PA | Pass | State |
| 2025-11-04 | HEIDELBERG MTLS NORTHEAST PA/PENNS PARK PLT — high-priority violation on file | PENNS PARK, Bucks, PA | Pass | State |
| 2025-11-04 | NFG MIDSTREAM COVINGTON LLC/SHAW COMP STA | MAINESBURG, Tioga, PA | Pending | State |
| 2025-11-04 | ROVER PIPELINE LLC/BULGER COMP STA | BULGER, Washington, PA | Pass | State |
| 2025-11-04 | ULMER BROTHERS | BLUFFTON, Beaufort, SC | Pass | State |
| 2025-11-04 | HURON ENERGY LLC, DBA GLACIAL LAKES ENERGY LLC — high-priority violation on file | HURON, Beadle, SD | Pass | State |
| 2025-11-04 | THE ROBINETTE COMPANY | BRISTOL, Sullivan, TN | Pass | State |
| 2025-11-04 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2025-11-04 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2025-11-04 | TRANSCONTINENTAL GAS PIPELINE - STATION 180 | UNIONVILLE, Orange, VA | Pass | State |
| 2025-11-04 | BOEING DEVELOPMENTAL CENTER | TUKWILA, King, WA | Pass | Local |
| 2025-11-04 | BOEING DEVELOPMENTAL CENTER | TUKWILA, King, WA | Pass | Local |
| 2025-11-04 | BOEING DEVELOPMENTAL CENTER | TUKWILA, King, WA | Pass | Local |
| 2025-11-04 | TRANSALTA CENTRALIA GENERATION, LLC — high-priority violation on file | CENTRALIA, Lewis, WA | Pass | Local |
| 2025-11-04 | BARRON COUNTY WASTE TO ENERGY AND RECYCLING FACILITY — high-priority violation on file | ALMENA, Barron, WI | Pass | State |
| 2025-11-04 | BARRON COUNTY WASTE TO ENERGY AND RECYCLING FACILITY — high-priority violation on file | ALMENA, Barron, WI | Pass | State |
| 2025-11-04 | GREEN BAY PACKAGING INC - GB MILL DIV | GREEN BAY, Brown, WI | Pass | State |
| 2025-11-04 | KERRY INC — high-priority violation on file | RHINELANDER, Outagamie, WI | Pass | State |
| 2025-11-04 | ARDAGH GLASS INC — high-priority violation on file | BURLINGTON, Richland, WI | Pass | State |
| 2025-11-04 | WAUPACA FOUNDRY INC - PLANT 2 & 3 | WAUPACA, Waushara, WI | Pass | State |
| 2025-11-04 | COLUMBIA GAS TRANSMISSION, LLC, FRAMETOWN | FRAMETOWN, Braxton, WV | Pass | State |
| 2025-11-04 | MONONGAHELA POWER COMPANY, HARRISON STATION | HAYWOOD, Harrison, WV | Pass | State |
| 2025-11-03 | DESOTO GATHERING COMPANY, LLC - CADDIS CPF-2 | DAMASCUS, Faulkner, AR | Pass | State |
| 2025-11-03 | DESOTO GATHERING COMPANY, LLC - CADDIS CPF-2 | DAMASCUS, Faulkner, AR | Pass | State |
| 2025-11-03 | DESOTO GATHERING COMPANY, LLC - CADDIS CPF-2 | DAMASCUS, Faulkner, AR | Pass | State |
| 2025-11-03 | ET GATHERING & PROCESSING LLC. - CHISMVILLE COMPRESSOR STATION | BOONEVILLE, Logan, AR | Pass | State |
| 2025-11-03 | ET GATHERING & PROCESSING LLC. - CHISMVILLE COMPRESSOR STATION | BOONEVILLE, Logan, AR | Pass | State |
| 2025-11-03 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2025-11-03 | SAN JOAQUIN REFINING CO — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.