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 |
|---|---|---|---|---|
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | EQM OLYMPUS MIDSTREAM, LLC - TYGERR COMPRESSOR STATION | JACOBSBURG, Belmont, OH | Pass | State |
| 2021-11-17 | ASCENT RESOURCES - UTICA LLC - RABER LND GR | QUAKER CITY, Guernsey, OH | Pass | State |
| 2021-11-17 | ASCENT RESOURCES - UTICA LLC - RABER LND GR | QUAKER CITY, Guernsey, OH | Pass | State |
| 2021-11-17 | ASCENT RESOURCES - UTICA LLC - RABER LND GR | QUAKER CITY, Guernsey, OH | Pass | State |
| 2021-11-17 | ASCENT RESOURCES - UTICA LLC - LAKE 20-11N-7W | FREEPORT, Harrison, OH | Pass | State |
| 2021-11-17 | ASCENT RESOURCES - UTICA LLC - LAKE 20-11N-7W | FREEPORT, Harrison, OH | Pass | State |
| 2021-11-17 | ASCENT RESOURCES - UTICA LLC - LAKE 20-11N-7W | FREEPORT, Harrison, OH | Pass | State |
| 2021-11-17 | MARATHON PETROLEUM COMPANY LP - CANTON REFINERY — high-priority violation on file | CANTON, Stark, OH | Pass | State |
| 2021-11-17 | ET GATHERING PROCESSING LLC / TERRIER COMPRESSOR STATION | THOMAS, Custer, OK | Pass | State |
| 2021-11-17 | HOWARD ENERGY PARTNERS / TATUMS COMPRESSOR STATION | TATUMS, Garvin, OK | Pass | State |
| 2021-11-17 | HOWARD ENERGY PARTNERS / TATUMS COMPRESSOR STATION | TATUMS, Garvin, OK | Pass | State |
| 2021-11-17 | CONTINENTAL RESOURCES / LAMBAKIS 2 11 2XH | BRADLEY, Grady, OK | Pass | State |
| 2021-11-17 | MARKWEST OKLAHOMA GAS CO LLC / LOYAL COMPRESSOR STATION | LOYAL, Kingfisher, OK | Pass | State |
| 2021-11-17 | MARKWEST OKLAHOMA GAS CO LLC / STANGL COMPRESSOR STATION | KINGFISHER, Kingfisher, OK | Pass | State |
| 2021-11-17 | ET GATHERING PROCESSING LLC / F AND H COMPRESSOR STATION | WILBURTON, Latimer, OK | Pass | State |
| 2021-11-17 | ET GATHERING PROCESSING LLC / F AND H COMPRESSOR STATION | WILBURTON, Latimer, OK | Pass | State |
| 2021-11-17 | OG AND E / RIVER VALLEY GENERATING STATION | PANAMA, Le Flore, OK | Pass | State |
| 2021-11-17 | ANCHOR GLASS CONTAINER CORP / HENRYETTA FACILITY | HENRYETTA, Okmulgee, OK | Pass | State |
| 2021-11-17 | STIMSON LUMBER COMPANY — high-priority violation on file | GASTON, Washington, OR | Pass | State |
| 2021-11-17 | BOEING CO PHILA/RIDLEY PARK PA FAC — high-priority violation on file | RIDLEY TWP, Delaware, PA | Pass | State |
| 2021-11-17 | APPALACHIA MIDSTREAM SVC LLC/WILMOT COMP STA | WYALUSING, Bradford, PA | Pass | State |
| 2021-11-17 | CABOT OIL & GAS CORP/KROPA, T. PAD 1 | SPRINGVILLE, Susquehanna, PA | Pass | State |
| 2021-11-17 | CABOT OIL & GAS CORP/BISHOP, B PAD 1 | SPRINGVILLE, Susquehanna, PA | Pass | State |
| 2021-11-17 | CABOT OIL & GAS CORP/MAKOSKY T PAD 1 | KINGSLEY, Susquehanna, PA | Pass | State |
| 2021-11-17 | TORAY PLASTICS (AMERICA), INC. | NORTH KINGSTOWN, Washington, RI | Pass | State |
| 2021-11-17 | ALLENDALE BIOMASS LLC | FAIRFAX, Allendale, SC | Pass | State |
| 2021-11-17 | SANTEE COOPER WINYAH GENERATING STATION | GEORGETOWN, Georgetown, SC | Pass | State |
| 2021-11-17 | HARVEST FOUR CORNERS, LLC - IGNACIO GAS PLANT | DURANGO, La Plata, CO | Pass | State |
| 2021-11-17 | KENNECOTT MAIN STACK, SMELTER AND | BINGHAM CANYON, Salt Lake, UT | Pass | State |
| 2021-11-17 | AMAZON DCA-50 | ELKWOOD, Culpeper, VA | Fail | State |
| 2021-11-17 | LES PROJECT HOLDINGS, LLC F/K/A MICHIGAN CONGENERATION SYSTEMS, INC. | LORTON, Fairfax, VA | Pass | State |
| 2021-11-17 | KINDER MORGAN SOUTHEAST TERMINALS LLC - RICHMOND 1 | RICHMOND, Richmond (city), VA | Pass | State |
| 2021-11-17 | BALL CONTAINER, LLC | FORT ATKINSON, Jefferson, WI | Pass | State |
| 2021-11-17 | WESTLAKE NATRIUM LLC, WESTLAKE NATRIUM | PROCTOR, Marshall, WV | Pass | State |
| 2021-11-17 | MONONGAHELA POWER COMPANY, FORT MARTIN STATION | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2021-11-17 | COLUMBIA GAS TRANSMISSION, LLC, FILES CREEK | BEVERLY, Randolph, WV | Pass | State |
| 2021-11-17 | COLONY PLANT (BENTONITE PERFORMANCE MINERALS) | COLONY, Crook, WY | Pass | State |
| 2021-11-17 | CHEYENNE PRAIRIE GENERATING STATION (CHEYENNE LIGHT FUEL & POWER) | CHEYENNE, Laramie, WY | Pass | State |
| 2021-11-17 | BIG ISLAND MINE & REFINERY (SISECAM WYOMING LLC) — high-priority violation on file | SWEETWATER COUNTY, Sweetwater, WY | Pass | State |
| 2021-11-16 | TARGA BADLANDS JUNCTION COMPRESSOR STATION | MCKENZIE COUNTY, McKenzie, ND | Pass | U.S. EPA |
| 2021-11-16 | HILCORP ALASKA, LLC / PLATFORM A — high-priority violation on file | KENAI, Kenai Peninsula, AK | Pass | State |
| 2021-11-16 | SOUTHERN NATURAL GAS | ANNISTON, Calhoun, AL | Pass | State |
| 2021-11-16 | SOUTHERN NATURAL GAS | ANNISTON, Calhoun, AL | Pass | State |
| 2021-11-16 | 3M COMPANY — high-priority violation on file | GUIN, Marion, AL | Pass | State |
| 2021-11-16 | GULFSTREAM NATURAL GAS SYSTEM LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-16 | GULFSTREAM NATURAL GAS SYSTEM LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-16 | OUTOKUMPU STAINLESS USA, LLC | CALVERT, Mobile, AL | Pass | State |
| 2021-11-16 | OUTOKUMPU STAINLESS USA, LLC | CALVERT, Mobile, AL | Pass | State |
| 2021-11-16 | WILLIAMS MOBILE BAY PRODUCER SERVICES, LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-16 | WILLIAMS MOBILE BAY PRODUCER SERVICES, LLC | CODEN, Mobile, AL | Pass | State |
| 2021-11-16 | JOHNS MANVILLE INC. | PHENIX CITY, Russell, AL | Pass | State |
| 2021-11-16 | HUNT REFINING COMPANY | TUSCALOOSA, Tuscaloosa, AL | Pass | State |
| 2021-11-16 | WIREGRASS CONSTRUCTION CO, INC. | HUNTSVILLE, Madison, AL | Pass | Local |
| 2021-11-16 | ENTERGY ARKANSAS, LLC - INDEPENDENCE PLANT | NEWARK, Independence, AR | Pass | State |
| 2021-11-16 | ENTERGY ARKANSAS, LLC - INDEPENDENCE PLANT | NEWARK, Independence, AR | Pass | State |
| 2021-11-16 | SILGAN CONTAINERS | SACRAMENTO, Sacramento, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
| 2021-11-16 | FRESNO COGEN PARTNERS | SAN JOAQUIN, Fresno, CA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.