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 |
|---|---|---|---|---|
| 2023-08-22 | CENTRAL SPECIALTIES INC - PLANT 3 | ALEXANDRIA, Douglas, MN | Pass | State |
| 2023-08-22 | ERGON REFINING INC — high-priority violation on file | VICKSBURG, Warren, MS | Pass | State |
| 2023-08-22 | WESTERN CAROLINA UNIVERSITY | CULLOWHEE, Jackson, NC | Pending | State |
| 2023-08-22 | ENVIVA NORTHAMPTON | GARYSBURG, Northampton, NC | Pass | State |
| 2023-08-22 | DUKE ENERGY PROGRESS, LLC - ROXBORO STEAM ELECTRIC PLANT | SEMORA, Person, NC | Pass | State |
| 2023-08-22 | SIEMENS ENERGY, INC. | CHARLOTTE, Mecklenburg, NC | Pass | Local |
| 2023-08-22 | DAKOTA GASIFICATION COMPANY (DGC) - GREAT PLAINS SYNFUELS PLANT - AQ | BEULAH, Mercer, ND | Pass | State |
| 2023-08-22 | BASIN ELECTRIC POWER COOPERATIVE - PIONEER GENERATION STATION - AQ | WILLISTON, Williams, ND | Pass | State |
| 2023-08-22 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2023-08-22 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2023-08-22 | NJDHS VINELAND DEVELOPMENTAL CTR | VINELAND, Cumberland, NJ | Pass | State |
| 2023-08-22 | VANDELAY COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2023-08-22 | VANDELAY COMPRESSOR STATION | JAL, Lea, NM | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | MARKWEST TRI-COUNTY COMPRESSOR STATION | BARNESVILLE, Belmont, OH | Pass | State |
| 2023-08-22 | VALIDUS ENERGY II MIDCON LLC / LUDWIG 7 22 15XH 8 22 15XH 9 22 15XH | WATONGA, Blaine, OK | Pass | State |
| 2023-08-22 | XTO ENERGY INC / SKYTRAIN COMPRESSOR STATION | BAUM, Carter, OK | Pass | State |
| 2023-08-22 | XTO ENERGY INC / SKYTRAIN COMPRESSOR STATION | BAUM, Carter, OK | Pass | State |
| 2023-08-22 | CONTINENTAL RESOURCES / ELECTA 1 10 3XHW | FAY, Dewey, OK | Pass | State |
| 2023-08-22 | ET GATHERING PROCESSING LLC / PURDY COMPRESSOR STATION | PURDY, Garvin, OK | Pass | State |
| 2023-08-22 | ET GATHERING PROCESSING LLC / PURDY COMPRESSOR STATION | PURDY, Garvin, OK | Pass | State |
| 2023-08-22 | ET GATHERING PROCESSING LLC / PURDY COMPRESSOR STATION | PURDY, Garvin, OK | Pass | State |
| 2023-08-22 | VALIDUS ENERGY II MIDCON LLC / GRIZZLY 1 4H | CASHION, Kingfisher, OK | Pass | State |
| 2023-08-22 | BCE MACH III MIDSTREAM HOLDINGS LLC / SOUTH OF LINCOLN COMPRESSOR STATION | KINGFISHER, Kingfisher, OK | Pass | State |
| 2023-08-22 | VALIDUS ENERGY II MIDCON LLC / BOEHS PAD | FAIRVIEW, Major, OK | Pass | State |
| 2023-08-22 | DCP OPERATING CO LP / SHOLEM GAS PLANT | VELMA, Stephens, OK | Pass | State |
| 2023-08-22 | DCP OPERATING CO LP / SHOLEM GAS PLANT | VELMA, Stephens, OK | Pass | State |
| 2023-08-22 | EASTERN GAS TRANS & STORAGE/PUNXSUTAWNEY | PUNXSUTAWNEY, Jefferson, PA | Pass | State |
| 2023-08-22 | EASTERN GAS TRANS & STORAGE INC/ARDELL COMP STA/ELK | WEEDVILLE, Elk, PA | Pass | State |
| 2023-08-22 | ETC NORTHEAST PIPELINE/GALAXY COMP STA | PARKER, Butler, PA | Pass | State |
| 2023-08-22 | USS/CLAIRTON WORKS — high-priority violation on file | CLAIRTON, Allegheny, PA | Pass | Local |
| 2023-08-22 | MINASOLVE, LLC | MEMPHIS, Shelby, TN | Pass | Local |
| 2023-08-22 | CHEVRON USA | UTAH, Undetermined, UT | Pass | State |
| 2023-08-22 | H L MOONEY WATER RECLAMATION FACILITY | WOODBRIDGE, Prince William, VA | Pass | State |
| 2023-08-22 | SUFFOLK CITY - PUBLIC WORKS | SUFFOLK, Suffolk (city), VA | Pass | State |
| 2023-08-22 | SUPERIOR REFINING COMPANY LLC — high-priority violation on file | SUPERIOR, Douglas, WI | Pass | State |
| 2023-08-22 | ARCLIN SURFACES INC | HAYWARD, Shawano, WI | Pass | State |
| 2023-08-22 | COLUMBIA GAS TRANSMISSION, LLC, GLENVILLE | TRUEBADA, Gilmer, WV | Pass | State |
| 2023-08-22 | COLONY PLANT (BENTONITE PERFORMANCE MINERALS) | COLONY, Crook, WY | Pass | State |
| 2023-08-22 | GREEN RIVER WORKS (TATA CHEMICALS (SODA ASH) PARTNERS) | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2023-08-21 | DESOTO GATHERING COMPANY, LLC - MIDGE CPF-2 | PANGBURN, White, AR | Pass | State |
| 2023-08-21 | DESOTO GATHERING COMPANY, LLC - TIGER CPF 2 | JUDSONIA, White, AR | Pass | State |
| 2023-08-21 | ARLINGTON VALLEY — high-priority violation on file | MARICOPA COUNTY, Maricopa, AZ | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | CHEVRON USA INC- HEAVY OIL — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2023-08-21 | DEL MONTE CORP-HANFORD PLANT 24 | HANFORD, Kings, CA | Pass | Local |
| 2023-08-21 | DEL MONTE CORP-HANFORD PLANT 24 | HANFORD, Kings, CA | Pass | Local |
| 2023-08-21 | DEL MONTE CORP-HANFORD PLANT 24 | HANFORD, Kings, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
| 2023-08-21 | INGOMAR PACKING COMPANY | LOS BANOS, Merced, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.