EPA Air · stack tests by year
Air-emissions stack tests in 2021
- 35,950Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2021
- California 17,676
- Ohio 2,582
- Florida 1,540
- Indiana 1,495
- Oklahoma 1,318
- Georgia 1,189
- New Mexico 841
- Pennsylvania 788
- Alabama 621
- Mississippi 589
- Texas 574
- Arkansas 518
- Missouri 515
- Colorado 407
- Iowa 368
- Washington 334
- North Carolina 273
- Michigan 256
- Wisconsin 239
- Wyoming 235
- West Virginia 225
- Kentucky 222
- Delaware 222
- Montana 220
- South Carolina 217
- Minnesota 209
- Kansas 177
- Alaska 143
- Illinois 142
- Utah 140
- Nevada 136
- Virginia 131
- Nebraska 117
- Maine 110
- New Jersey 110
- New York 103
- Connecticut 99
- Tennessee 98
- North Dakota 93
- Arizona 93
- Idaho 90
- Louisiana 69
- Hawaii 64
- Maryland 56
- South Dakota 55
- District of Columbia 54
- New Hampshire 53
- Oregon 45
- Rhode Island 34
- Massachusetts 29
- Puerto Rico 19
- Vermont 17
Other years
Air-emissions stack tests recorded in 2021
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2021-11-02 | ET GATHERING PROCESSING LLC / AVARD COMPRESSOR STATION | AVARD, Woods, OK | Pass | State |
| 2021-11-02 | ET GATHERING PROCESSING LLC / AVARD COMPRESSOR STATION | AVARD, Woods, OK | Pass | State |
| 2021-11-02 | TRANSCONTINENTAL GAS/BEAR CREEK STA 515 | BEAR CREEK, Luzerne, PA | Pass | State |
| 2021-11-02 | NEXTERA RENEWABLE FUELS LLC/FREY FARM CRESWELL LDFL | CONESTOGA, Lancaster, PA | Pass | State |
| 2021-11-02 | BRANDYWINE GREEN LLC/DBA ABBEY GLENN — high-priority violation on file | WEST CHESTER, Chester, PA | Pass | State |
| 2021-11-02 | WILLIAMS FIELD SVC CO LLC/WILCOX COMP STA | TUNKHANNOCK, Wyoming, PA | Pass | State |
| 2021-11-02 | WILLIAMS FIELD SVC CO/MACNEW COMP STA | HOP BOTTOM, Susquehanna, PA | Pass | State |
| 2021-11-02 | ALGONQUIN GAS TRANSMISSION LINE | BURRILLVILLE, TOWN OF, Providence, RI | Pass | State |
| 2021-11-02 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2021-11-02 | COMPASS MINERALS | UTAH, Undetermined, UT | Pass | State |
| 2021-11-02 | WESTROCK LONGVIEW LLC — high-priority violation on file | LONGVIEW, Cowlitz, WA | Pass | State |
| 2021-11-02 | PHILLIPS 66 | FERNDALE, Whatcom, WA | Pass | Local |
| 2021-11-02 | CEDAR GROVE COMPOST CO | MAPLE VALLEY, King, WA | Fail | Local |
| 2021-11-02 | UNITED GRAIN CORPORATION — high-priority violation on file | VANCOUVER, Clark, WA | Pass | Local |
| 2021-11-02 | TRANSALTA CENTRALIA GENERATION, LLC — high-priority violation on file | CENTRALIA, Lewis, WA | Pass | Local |
| 2021-11-02 | TRANSALTA CENTRALIA GENERATION, LLC — high-priority violation on file | CENTRALIA, Lewis, WA | Pass | Local |
| 2021-11-02 | ANR PIPELINE CO - KEWASKUM COMPRESSOR ST | ADELL, Taylor, WI | Pass | State |
| 2021-11-02 | IBP SOLUTIONS US LLC | MARSHFIELD, Menominee, WI | Pass | State |
| 2021-11-02 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2021-11-02 | ANTERO MIDSTREAM LLC, MIDDLEBOURNE III | WICK, Tyler, WV | Pass | State |
| 2021-11-02 | CKN-ROCK SPRINGS STATION (MOUNTAIN WEST PIPELINE, LLC) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2021-11-01 | DESOTO GATHERING COMPANY, LLC - TIGER CPF 2 | JUDSONIA, White, AR | Pass | State |
| 2021-11-01 | DESOTO GATHERING COMPANY, LLC - TIGER CPF 2 | JUDSONIA, White, AR | Pass | State |
| 2021-11-01 | LA CITY, DWP SCATTERGOOD GENERATING STN | PLAYA DEL REY, Los Angeles, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | CHEVRON USA_(FORMERLY MIDWAY SUNSET OIL) — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | MM TULARE ENERGY LLC VISALIA LANDFILL | VISALIA, Tulare, CA | Pass | Local |
| 2021-11-01 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2021-11-01 | SUNCOR ENERGY - DENVER REFINERY — high-priority violation on file | COMMERCE CITY, Adams, CO | Pass | State |
| 2021-11-01 | AES HAWAII | KAPOLEI, Honolulu, HI | Pass | State |
| 2021-11-01 | MECO - MAALAEA | MAALAEA, Maui, HI | Pass | State |
| 2021-11-01 | GENERAL MILLS OPERATIONS, INC. — high-priority violation on file | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2021-11-01 | JUPITER ALUMINUM CORPORATION — high-priority violation on file | HAMMOND, Lake, IN | Pass | State |
| 2021-11-01 | JUPITER ALUMINUM CORPORATION — high-priority violation on file | HAMMOND, Lake, IN | Pass | State |
| 2021-11-01 | POET BIOREFINING - ALEXANDRIA LLC | ALEXANDRIA, Madison, IN | Pass | State |
| 2021-11-01 | POET BIOREFINING - ALEXANDRIA LLC | ALEXANDRIA, Madison, IN | Pass | State |
| 2021-11-01 | POET BIOREFINING - ALEXANDRIA LLC | ALEXANDRIA, Madison, IN | Pass | State |
| 2021-11-01 | POET BIOREFINING - ALEXANDRIA LLC | ALEXANDRIA, Madison, IN | Pass | State |
| 2021-11-01 | POET BIOREFINING - ALEXANDRIA LLC | ALEXANDRIA, Madison, IN | Pass | State |
| 2021-11-01 | POET BIOREFINING - ALEXANDRIA LLC | ALEXANDRIA, Madison, IN | Pass | State |
| 2021-11-01 | IACX ENERGY - PEAK FACILITY (AIR) | BELPRE, Edwards, KS | Pass | State |
| 2021-11-01 | HOMETOWN BIOENERGY | LE SUEUR, Le Sueur, MN | Pass | State |
| 2021-11-01 | OWENS-CORNING STATELINE | JOPLIN, Jasper, MO | Fail | State |
| 2021-11-01 | UNIVERSITY OF MISSISSIPPI, THE | UNIVERSITY, Lafayette, MS | Pass | State |
| 2021-11-01 | UNIVERSITY OF MISSISSIPPI, THE | UNIVERSITY, Lafayette, MS | Pass | State |
| 2021-11-01 | UNIVERSITY OF MISSISSIPPI, THE | UNIVERSITY, Lafayette, MS | Pass | State |
| 2021-11-01 | UNIVERSITY OF MISSISSIPPI, THE | UNIVERSITY, Lafayette, MS | Pass | State |
| 2021-11-01 | IKE WILLIAMSON SAND PIT, ACB | SHALLOTTE, Brunswick, NC | Pass | State |
| 2021-11-01 | PECOS RIVER TREATER | MALAGA, Eddy, NM | Pass | State |
| 2021-11-01 | EUNICE GAS PROCESSING PLANT — high-priority violation on file | EUNICE, Lea, NM | Pass | State |
| 2021-11-01 | EUNICE GAS PROCESSING PLANT — high-priority violation on file | EUNICE, Lea, NM | Pass | State |
| 2021-11-01 | PLANTVIEW COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | EOG - VALOR COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2021-11-01 | WELLS CARGO LONE MOUNTAIN PLANT | LAS VEGAS, Clark, NV | Pass | Local |
| 2021-11-01 | WELLS CARGO LONE MOUNTAIN PLANT | LAS VEGAS, Clark, NV | Pass | Local |
| 2021-11-01 | IRON HORSE MIDSTREAM LLC / TERRITORY COMPRESSOR STATION | EL RENO, Canadian, OK | Pass | State |
| 2021-11-01 | IRON HORSE MIDSTREAM LLC / TERRITORY COMPRESSOR STATION | EL RENO, Canadian, OK | Pass | State |
| 2021-11-01 | ET GATHERING PROCESSING LLC / MORRIS COMPRESSOR STATION | BRADLEY, Grady, OK | Pass | State |
| 2021-11-01 | SUPERIOR MIDSTREAM LLC / REEDING COMPRESSOR STATION | CASHION, Kingfisher, OK | Pass | State |
| 2021-11-01 | SUPERIOR MIDSTREAM LLC / CASHION GAS PLANT — high-priority violation on file | CASHION, Logan, OK | Pass | State |
| 2021-11-01 | ET GATHERING PROCESSING LLC / ROBBERSON COMPRESSOR STATION | BRAY, Stephens, OK | Pass | State |
| 2021-11-01 | WILLIAMS FIELD SVC CO LLC/JONES COMP STA | FRIENDSVILLE, Susquehanna, PA | Pass | State |
| 2021-11-01 | UNITED GRAIN CORPORATION — high-priority violation on file | VANCOUVER, Clark, WA | Pass | Local |
| 2021-11-01 | MARKWEST LIBERTY MIDSTREAM & RESOURCES, L.L.C., MOBLEY GAS PLANT | SMITHFIELD, Wetzel, WV | Pass | State |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-10-31 | FRITO-LAY NORTH AMERICA, INC — 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.