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 |
|---|---|---|---|---|
| 2021-10-19 | AAR MOBILITY SYSTEMS | CADILLAC, Wexford, MI | Pass | State |
| 2021-10-19 | LACKS INDUSTRIES INC — high-priority violation on file | GRAND RAPIDS, Kent, MI | Pass | State |
| 2021-10-19 | LACKS ENTERPRISES INC. | GRAND RAPIDS, Kent, MI | Fail | State |
| 2021-10-19 | POTLATCHDELTIC LAND AND LUMBER LLC | BEMIDJI, Hubbard, MN | Pass | State |
| 2021-10-19 | CITY UTILITIES OF SPRINGFIELD MISSOURI JOHN TWITTY ENERGY CENTER — high-priority violation on file | SPRINGFIELD, Greene, MO | Pending | State |
| 2021-10-19 | CITY UTILITIES OF SPRINGFIELD MISSOURI JOHN TWITTY ENERGY CENTER — high-priority violation on file | SPRINGFIELD, Greene, MO | Pending | State |
| 2021-10-19 | NUCOR STEEL SEDALIA LLC | SEDALIA, Pettis, MO | Pass | State |
| 2021-10-19 | COLUMBIA GULF TRANSMISSION LLC, CORINTH COMPRESSOR STATION | CORINTH, Alcorn, MS | Pass | State |
| 2021-10-19 | COLUMBIA GULF TRANSMISSION LLC, CORINTH COMPRESSOR STATION | CORINTH, Alcorn, MS | Pass | State |
| 2021-10-19 | REGULATOR MARINE, INC. | EDENTON, Chowan, NC | Pass | State |
| 2021-10-19 | PHILLIPS 66 (BAYWAY REF/CONOCO) — high-priority violation on file | LINDEN, Union, NJ | Pass | State |
| 2021-10-19 | WEST TURKEY TRACK BOOSTER — high-priority violation on file | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-10-19 | WEST TURKEY TRACK BOOSTER — high-priority violation on file | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-10-19 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-19 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-19 | STRAWBERRY FIELDS BOOSTER STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-10-19 | STRAWBERRY FIELDS BOOSTER STATION | LOCO HILLS, Eddy, NM | Pass | State |
| 2021-10-19 | YONKERS JOINT WWTP | YONKERS, Westchester, NY | Pass | State |
| 2021-10-19 | SYLVAMO TICONDEROGA MILL | TICONDEROGA, Essex, NY | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | AUGUSTA COMPRESSOR FACILITY- UTICA GAS SERVICES, L.L.C. | EAST, TOWNSHIP OF, Carroll, OH | Pass | State |
| 2021-10-19 | CF POEPPELMAN INC. | BRADFORD, Miami, OH | Pass | State |
| 2021-10-19 | SOUTHERLY WASTEWATER TREATMENT CENTER | CUYAHOGA HEIGHTS, Cuyahoga, OH | Pass | State |
| 2021-10-19 | SANDRIDGE EXPLORATION AND PRODUCTION LL / GOEKEN 2 20H FACILITY | CHEROKEE, Alfalfa, OK | Pass | State |
| 2021-10-19 | SANDRIDGE EXPLORATION AND PRODUCTION LL / GOEKEN 2 20H FACILITY | CHEROKEE, Alfalfa, OK | Pass | State |
| 2021-10-19 | SANDRIDGE EXPLORATION AND PRODUCTION LL / LAWILDA 2 10H FACILITY | CHEROKEE, Alfalfa, OK | Pass | State |
| 2021-10-19 | TOM STACK LLC / ROGUE COMPRESSOR STATION | CONCHO, Canadian, OK | Pass | State |
| 2021-10-19 | EJ ARDMORE INC / ARDMORE FOUNDRY | ARDMORE, Carter, OK | Pass | State |
| 2021-10-19 | EJ ARDMORE INC / ARDMORE FOUNDRY | ARDMORE, Carter, OK | Pass | State |
| 2021-10-19 | MARKWEST OKLAHOMA GAS CO LLC / SPRAGUE COMPRESSOR STATION | COALGATE, Coal, OK | Pass | State |
| 2021-10-19 | MARKWEST OKLAHOMA GAS CO LLC / SPRAGUE COMPRESSOR STATION | COALGATE, Coal, OK | Pass | State |
| 2021-10-19 | ET GATHERING PROCESSING LLC / MORRIS COMPRESSOR STATION | BRADLEY, Grady, OK | Pass | State |
| 2021-10-19 | ONEOK FIELD SERVICES CO LLC / WICKHAM LATERAL COMPRESSOR STATION | LEEDEY, Roger Mills, OK | Pass | State |
| 2021-10-19 | ET GATHERING PROCESSING LLC / BRAY COMPRESSOR STATION | BRAY, Stephens, OK | Pass | State |
| 2021-10-19 | KEYSTONE PORTLAND CEMENT/EAST ALLEN — high-priority violation on file | BATH, Northampton, PA | Pass | State |
| 2021-10-19 | NUCOR STEEL - BERKELEY | HUGER, Berkeley, SC | Pass | State |
| 2021-10-19 | QUIKRETE CONSTRUCTION MATERIALS, LLC — high-priority violation on file | HARLEYVILLE, Dorchester, SC | Pass | State |
| 2021-10-19 | REEVES CONSTRUCTION COMPANY - LAKESIDE ASPHALT PLANT | PIEDMONT, Greenville, SC | Pass | State |
| 2021-10-19 | PALMETTO CORPORATION FLORENCE PLANT — high-priority violation on file | FLORENCE, Florence, SC | Pass | State |
| 2021-10-19 | HOLCIM TEXAS | MIDLOTHIAN, Ellis, TX | N/A | State |
| 2021-10-19 | HOLCIM TEXAS | MIDLOTHIAN, Ellis, TX | N/A | State |
| 2021-10-19 | SALT LAKE ENERGY SYSTEMS LLC | SALT LAKE CITY, Salt Lake, UT | Pass | State |
| 2021-10-19 | SALT LAKE ENERGY SYSTEMS LLC | SALT LAKE CITY, Salt Lake, UT | Pass | State |
| 2021-10-19 | BUCHANAN PREPARATION PLANT FACILITY | OAKWOOD, Buchanan, VA | Pass | State |
| 2021-10-19 | MCKINLEY PAPER COMPANY — high-priority violation on file | PORT ANGELES, Clallam, WA | Pass | Local |
| 2021-10-19 | UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file | FRIESLAND, Columbia, WI | Pass | State |
| 2021-10-19 | MERCURY MARINE - PLANTS 3,4,10,12,15,17, | FOND DU LAC, Fond du Lac, WI | Pass | State |
| 2021-10-19 | WVA MANUFACTURING, LLC, ALLOY — high-priority violation on file | ALLOY, Fayette, WV | Pass | State |
| 2021-10-19 | ERGON - WEST VIRGINIA, INC., NEWELL | NEWELL, Hancock, WV | Pass | State |
| 2021-10-19 | OMNIS PLEASANTS, LLC, PLEASANTS POWER STATION | WILLOW ISLAND, Pleasants, WV | Pass | State |
| 2021-10-18 | DOYON UTILITIES, LLC / FORT WAINWRIGHT (PRIVATIZED EMISSION UN | FAIRBANKS, Fairbanks North Star, AK | Pass | State |
| 2021-10-18 | CONOCOPHILLIPS ALASKA, INC. / ALPINE CENTRAL PROCESSING FACILITY | NORTH SLOPE BOROUGH, North Slope, AK | Pass | State |
| 2021-10-18 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2021-10-18 | INTERNATIONAL PAPER COMPANY — high-priority violation on file | SELMA, Dallas, AL | Pass | State |
| 2021-10-18 | DESOTO GATHERING COMPANY LLC - PIKE CPF-1 | HATTIEVILLE, Conway, AR | Pass | State |
| 2021-10-18 | DESOTO GATHERING COMPANY, LLC - NEW QUITMAN CPF-1 | QUITMAN, Faulkner, AR | Pass | State |
| 2021-10-18 | APAC CENTRAL - CRUSHER (VALLEY SPRINGS) | HARRISON, Boone, AR | Pass | State |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | JG BOSWELL CO- OIL MILL | CORCORAN, Kings, CA | Pass | Local |
| 2021-10-18 | TEP ROCKY MTN - CLOUGH PRODUCTION | RIFLE AREA, Garfield, CO | Pass | State |
| 2021-10-18 | DCP OPERATING CO - GREELEY NATURAL GAS P | EVANS AREA, Weld, CO | Pass | State |
| 2021-10-18 | DCP OPERATING CO - GREELEY NATURAL GAS P | EVANS AREA, Weld, CO | Pass | State |
| 2021-10-18 | DCP OPERATING CO - GREELEY NATURAL GAS P | EVANS AREA, Weld, CO | Pass | State |
| 2021-10-18 | DCP OPERATING CO - GREELEY NATURAL GAS P | EVANS AREA, Weld, CO | Pass | State |
| 2021-10-18 | CRODA, INC — high-priority violation on file | NEW CASTLE, New Castle, DE | Pass | State |
| 2021-10-18 | CRODA, INC — high-priority violation on file | NEW CASTLE, New Castle, DE | Pass | State |
| 2021-10-18 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-18 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-18 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-18 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2021-10-18 | MECO - MAALAEA | MAALAEA, Maui, HI | Pass | State |
| 2021-10-18 | MECO - MAALAEA | MAALAEA, Maui, HI | Pass | State |
| 2021-10-18 | JOHN DEERE DUBUQUE WORKS | DUBUQUE, Dubuque, IA | Pass | State |
| 2021-10-18 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2021-10-18 | NORTHERN NATURAL GAS - FARMINGTON | FARMINGTON, Dakota, MN | Pass | State |
| 2021-10-18 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
| 2021-10-18 | GREENLEAF CO2 SOLUTIONS LLC, WEST YELLOW CREEK COMPRESSOR STATION — high-priority violation on file | WAYNESBORO, Wayne, MS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.