EPA Air · stack tests by year
Air-emissions stack tests in 2023
- 26,911Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2023
- California 7,676
- Ohio 2,800
- Florida 1,589
- Indiana 1,487
- Oklahoma 1,420
- New Mexico 1,087
- Georgia 1,057
- Pennsylvania 889
- Alabama 689
- Wyoming 670
- Mississippi 625
- Arkansas 602
- Iowa 453
- Colorado 436
- Texas 395
- Missouri 328
- North Carolina 302
- Washington 283
- Wisconsin 251
- Michigan 229
- Minnesota 228
- Delaware 224
- South Carolina 222
- West Virginia 218
- Kentucky 210
- Tennessee 200
- Utah 196
- Montana 177
- Virginia 170
- North Dakota 157
- Illinois 152
- Nebraska 152
- Alaska 140
- Nevada 127
- New York 123
- Maine 111
- Connecticut 108
- Arizona 102
- Louisiana 77
- Idaho 77
- Hawaii 72
- New Hampshire 58
- New Jersey 56
- South Dakota 54
- Maryland 49
- Kansas 45
- Oregon 44
- District of Columbia 36
- Massachusetts 27
- Rhode Island 20
- Puerto Rico 6
- Vermont 5
Other years
Air-emissions stack tests recorded in 2023
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2023-11-01 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2023-11-01 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2023-11-01 | LEAF RIVER CELLULOSE LLC — high-priority violation on file | NEW AUGUSTA, Perry, MS | Pass | State |
| 2023-11-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2023-11-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2023-11-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2023-11-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2023-11-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2023-11-01 | CHS INC REFINERY LAUREL | LAUREL, Yellowstone, MT | Pass | State |
| 2023-11-01 | HEXION INC. - FAYETTEVILLE FACILITY | FAYETTEVILLE, Cumberland, NC | Pass | State |
| 2023-11-01 | TIGER COMPRESSOR STATION — high-priority violation on file | MALAGA, Eddy, NM | Pass | State |
| 2023-11-01 | TIGER COMPRESSOR STATION — high-priority violation on file | MALAGA, Eddy, NM | Pass | State |
| 2023-11-01 | CADILLAC COMPRESSOR STATION | MALAGA, Eddy, NM | Pass | State |
| 2023-11-01 | LEO THORSNESS FACILITY | JAL, Lea, NM | Pass | State |
| 2023-11-01 | MILKY WAY COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2023-11-01 | MILKY WAY COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2023-11-01 | SUN PEAK GENERATING STATION | LAS VEGAS, Clark, NV | Pass | Local |
| 2023-11-01 | MGM RESORTS INTERNATIONAL — high-priority violation on file | LAS VEGAS, Clark, NV | Pass | Local |
| 2023-11-01 | MGM RESORTS INTERNATIONAL — high-priority violation on file | LAS VEGAS, Clark, NV | Pass | Local |
| 2023-11-01 | NASSAU ENERGY LLC | HEMPSTEAD, Nassau, NY | Pass | State |
| 2023-11-01 | MARTIN MARIETTA MAGNESIA SPECIALTIES INC. | WOODVILLE, Sandusky, OH | Pass | State |
| 2023-11-01 | MARTIN MARIETTA MAGNESIA SPECIALTIES INC. | WOODVILLE, Sandusky, OH | Pass | State |
| 2023-11-01 | MARTIN MARIETTA MAGNESIA SPECIALTIES INC. | WOODVILLE, Sandusky, OH | Pass | State |
| 2023-11-01 | GENERAL JAMES M. GAVIN POWER PLANT | CHESHIRE, Gallia, OH | Pass | State |
| 2023-11-01 | EOG RESOURCES, INC. - KIDD 21-12-6 PAD | SCIO, Harrison, OH | Pass | State |
| 2023-11-01 | EOG RESOURCES, INC. - KIDD 21-12-6 PAD | SCIO, Harrison, OH | Pass | State |
| 2023-11-01 | EOG RESOURCES, INC. - KIDD 21-12-6 PAD | SCIO, Harrison, OH | Pass | State |
| 2023-11-01 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2023-11-01 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2023-11-01 | SAWYERS PAD 952878 | WOODSFIELD, Monroe, OH | Pass | State |
| 2023-11-01 | WILEY PAD 952982 | WOODSFIELD, Monroe, OH | Pass | State |
| 2023-11-01 | WILEY PAD 952982 | WOODSFIELD, Monroe, OH | Pass | State |
| 2023-11-01 | WILEY PAD 952982 | WOODSFIELD, Monroe, OH | Pass | State |
| 2023-11-01 | ET GATHERING PROCESSING LLC / ONE HORSE COMPRESSOR STATION | THOMAS, Custer, OK | Pass | State |
| 2023-11-01 | ET GATHERING PROCESSING LLC / ONE HORSE COMPRESSOR STATION | THOMAS, Custer, OK | Pass | State |
| 2023-11-01 | DCP OPERATING CO LP / WILD HOG BOOSTER STATION | BRADLEY, Grady, OK | Pass | State |
| 2023-11-01 | DCP OPERATING CO LP / WILD HOG BOOSTER STATION | BRADLEY, Grady, OK | Pass | State |
| 2023-11-01 | IRON HORSE MIDSTREAM LLC / IRON HORSE PROCESSING PLANT | AMBER, Grady, OK | Pass | State |
| 2023-11-01 | IRON HORSE MIDSTREAM LLC / IRON HORSE PROCESSING PLANT | AMBER, Grady, OK | Pass | State |
| 2023-11-01 | IRON HORSE MIDSTREAM LLC / IRON HORSE PROCESSING PLANT | AMBER, Grady, OK | Pass | State |
| 2023-11-01 | ET GATHERING PROCESSING LLC / UNION COMPRESSOR STATION | TABLER, Grady, OK | Pass | State |
| 2023-11-01 | ET GATHERING PROCESSING LLC / UNION COMPRESSOR STATION | TABLER, Grady, OK | Pass | State |
| 2023-11-01 | ET GATHERING PROCESSING LLC / UNION COMPRESSOR STATION | TABLER, Grady, OK | Pass | State |
| 2023-11-01 | ET GATHERING PROCESSING LLC / UNION COMPRESSOR STATION | TABLER, Grady, OK | Pass | State |
| 2023-11-01 | MARKWEST OKLAHOMA GAS CO LLC / DOROTHY COMPRESSOR STATION | KINGFISHER, Kingfisher, OK | Pass | State |
| 2023-11-01 | MARKWEST OKLAHOMA GAS CO LLC / DOVER COMPRESSOR STATION | DOVER, Kingfisher, OK | Pass | State |
| 2023-11-01 | INTER POWER AHLCON LP/COLVER POWER PROJ — high-priority violation on file | COLVER, Cambria, PA | Pass | State |
| 2023-11-01 | WOOD MODE LLC/KREAMER PLT | KREAMER, Snyder, PA | Fail | State |
| 2023-11-01 | WILLIAMS FIELD SVC CO LLC/WILCOX COMP STA | TUNKHANNOCK, Wyoming, PA | Pass | State |
| 2023-11-01 | PACIFICORP HUNTER | UTAH, Undetermined, UT | Pass | State |
| 2023-11-01 | PORT TOWNSEND PAPER CORPORATION — high-priority violation on file | PORT TOWNSEND, Jefferson, WA | Pass | State |
| 2023-11-01 | PORT TOWNSEND PAPER CORPORATION — high-priority violation on file | PORT TOWNSEND, Jefferson, WA | Pass | State |
| 2023-11-01 | MYSTIC SHEETS DBA GRAPHIC SHEETS | RENTON, King, WA | Pass | Local |
| 2023-11-01 | MYSTIC SHEETS DBA GRAPHIC SHEETS | RENTON, King, WA | Pass | Local |
| 2023-11-01 | COLUMBIA GAS TRANSMISSION, LLC, RIPLEY | SANDYVILLE, Jackson, WV | Pass | State |
| 2023-11-01 | HILIGHT GAS PLANT (WES POWDER RIVER HOLDINGS LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-01 | HILIGHT GAS PLANT (WES POWDER RIVER HOLDINGS LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-01 | HILIGHT GAS PLANT (WES POWDER RIVER HOLDINGS LLC) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-01 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-11-01 | HOUSE CREEK MAINLINE COMPRESSOR STATION (THUNDER CREEK GAS SERVICES) | CAMPBELL COUNTY, Campbell, WY | Pass | State |
| 2023-10-31 | HILCORP ALASKA, LLC / GATHERING CENTER #2 (GC 2) | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2023-10-31 | GEORGIA-PACIFIC BREWTON LLC | BREWTON, Escambia, AL | Pass | State |
| 2023-10-31 | GEORGIA-PACIFIC BREWTON LLC | BREWTON, Escambia, AL | Pass | State |
| 2023-10-31 | ALABAMA POWER COMPANY | BUCKS, Mobile, AL | Pass | State |
| 2023-10-31 | ALABAMA POWER COMPANY | BUCKS, Mobile, AL | Pass | State |
| 2023-10-31 | SSAB ALABAMA INC | AXIS, Mobile, AL | Pass | State |
| 2023-10-31 | GP CELLULOSE ALABAMA RIVER CELLULOSE LLC | PERDUE HILL, Monroe, AL | Pass | State |
| 2023-10-31 | GP CELLULOSE ALABAMA RIVER CELLULOSE LLC | PERDUE HILL, Monroe, AL | Pass | State |
| 2023-10-31 | 3M COMPANY | DECATUR, Morgan, AL | Pass | State |
| 2023-10-31 | AMERICAN ELECTRIC POWER SERVICE CORPORATION (JOHN W. TURK JR. POWER PLANT) | FULTON, Hempstead, AR | Pass | State |
| 2023-10-31 | SALINAS VALLEY SOLID WASTE AUTHORITY | GONZALES, Monterey, CA | Pass | Local |
| 2023-10-31 | SALINAS VALLEY SOLID WASTE AUTHORITY | GONZALES, Monterey, CA | Pass | Local |
| 2023-10-31 | SEARLES VALLEY MINERALS (IMC CHEMICALS) — high-priority violation on file | TRONA, San Bernardino, CA | Pass | Local |
| 2023-10-31 | SO CAL GAS CO | NORTHRIDGE, Los Angeles, CA | Pass | Local |
| 2023-10-31 | PACTIV LLC | FRESNO, Fresno, CA | Pass | Local |
| 2023-10-31 | PACTIV LLC | FRESNO, Fresno, CA | Pass | Local |
| 2023-10-31 | PACTIV LLC | FRESNO, Fresno, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | LINN OPERATING INC — high-priority violation on file | TAFT, Kern, CA | Pass | Local |
| 2023-10-31 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-31 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
| 2023-10-31 | ELK HILLS POWER LLC | TUPMAN, Kern, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.