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 |
|---|---|---|---|---|
| 2021-12-31 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | LAS VEGAS, Clark, NV | Pass | Local |
| 2021-12-31 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | LAS VEGAS, Clark, NV | Pass | Local |
| 2021-12-31 | LHOIST NORTH AMERICA OF ARIZONA - APEX PLANT — high-priority violation on file | LAS VEGAS, Clark, NV | Pass | Local |
| 2021-12-31 | CLEVELAND CLIFFS STEELTON LLC/STEELTON | STEELTON, Dauphin, PA | Pass | State |
| 2021-12-30 | PAR MONTANA BILLINGS REFINERY | BILLINGS, Yellowstone, MT | Pass | State |
| 2021-12-30 | LONGWOOD - STEBBINS COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2021-12-30 | LONGWOOD - STEBBINS COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2021-12-30 | LONGWOOD - STEBBINS COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2021-12-30 | JR SIMPLOT COMPANY | OVERTON, Clark, NV | Pass | Local |
| 2021-12-30 | MOUNTAIN STATE CLEAN ENERGY, LLC, MAIDSVILLE | MAIDSVILLE, Monongalia, WV | Pass | State |
| 2021-12-29 | INTERIOR GAS UTILITY (FORMERLY TITAN A / LIQUEFIED NATURAL GAS PLANT #1 | WASILLA, Matanuska-Susitna, AK | Pass | State |
| 2021-12-29 | INTERIOR GAS UTILITY (FORMERLY TITAN A / LIQUEFIED NATURAL GAS PLANT #1 | WASILLA, Matanuska-Susitna, AK | Pass | State |
| 2021-12-29 | HENKEL ELECTRONIC MATERIALS LLC | COMPTON, Los Angeles, CA | Pass | Local |
| 2021-12-29 | TEVA PHARMACEUTICALS | DAVIE, Broward, FL | Pass | State |
| 2021-12-29 | TEVA PHARMACEUTICALS | DAVIE, Broward, FL | Pass | State |
| 2021-12-29 | CLEARWATER PAPER CORPORATION - AUGUSTA MILL — high-priority violation on file | AUGUSTA, Richmond, GA | Pass | State |
| 2021-12-29 | GLEN-GERY CORP | MARSEILLES, La Salle, IL | Pass | State |
| 2021-12-29 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MITCHELL, Lawrence, IN | Pass | State |
| 2021-12-29 | ANR PIPELINE COMPANY SHELBYVILLE COMPRESSOR STATION | SHELBYVILLE, Shelby, IN | Pass | State |
| 2021-12-29 | ANR PIPELINE COMPANY SHELBYVILLE COMPRESSOR STATION | SHELBYVILLE, Shelby, IN | Pass | State |
| 2021-12-29 | THE CHEMOURS COMPANY FC, LLC | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2021-12-29 | MAGNITUDE 7 METALS, LLC | MARSTON, New Madrid, MO | Pending | State |
| 2021-12-29 | MAGNITUDE 7 METALS, LLC | MARSTON, New Madrid, MO | Pending | State |
| 2021-12-29 | LONGWOOD - STEBBINS COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2021-12-29 | LONGWOOD - STEBBINS COMPRESSOR STATION | CARLSBAD, Eddy, NM | Pass | State |
| 2021-12-29 | SALL'S BROTHERS CONSTRUCTION | ALBUQUERQUE, Bernalillo, NM | Pass | Local |
| 2021-12-29 | JR SIMPLOT COMPANY | OVERTON, Clark, NV | Pass | Local |
| 2021-12-29 | JR SIMPLOT COMPANY | OVERTON, Clark, NV | Pass | Local |
| 2021-12-29 | JR SIMPLOT COMPANY | OVERTON, Clark, NV | Pass | Local |
| 2021-12-29 | TEXAS EASTERN TRANS LP/MARIETTA | MARIETTA, Lancaster, PA | Pass | State |
| 2021-12-29 | ETC NORTHEAST PIPELINE LLC/BARTO COMP STA | HUGHESVILLE, Lycoming, PA | Pass | State |
| 2021-12-29 | APPALACHIAN POWER COMPANY, JOHN AMOS PLANT | WINFIELD, Putnam, WV | Pass | State |
| 2021-12-28 | R.E.C. TRANSPORT, INC. | RUSSELLVILLE, Pope, AR | Pass | State |
| 2021-12-28 | UTAH GAS - DRAGON TRAIL — high-priority violation on file | RANGELY 16.7 MI. S OF, Rio Blanco, CO | Pass | State |
| 2021-12-28 | EXPEDITION WATER SOLUTIONS - EWS #13 | KERSEY AREA, Weld, CO | Fail | State |
| 2021-12-28 | TEVA PHARMACEUTICALS | DAVIE, Broward, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | OSCEOLA FARMS | PAHOKEE, Palm Beach, FL | Pass | State |
| 2021-12-28 | ATLANTA GAS LIGHT COMPANY - MACON LNG PLANT | MACON, Jones, GA | Pass | State |
| 2021-12-28 | ATLANTA GAS LIGHT COMPANY - MACON LNG PLANT | MACON, Jones, GA | Pass | State |
| 2021-12-28 | ATLANTA GAS LIGHT COMPANY - MACON LNG PLANT | MACON, Jones, GA | Pass | State |
| 2021-12-28 | CARGILL INC-CEDAR RAPIDS_SW_SOYBEAN | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2021-12-28 | ORION ENGINEERED CARBONS LLC - IVANHOE CARBON BLACK PLANT — high-priority violation on file | FRANKLIN, St. Mary, LA | Pass | State |
| 2021-12-28 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2021-12-28 | KAO SPECIALTIES AMERICAS, LLC | HIGH POINT, Guilford, NC | Pass | State |
| 2021-12-28 | NPPD SHELDON STATION | HALLAM, Lancaster, NE | Pass | Local |
| 2021-12-28 | CUNNINGHAM STATION POWER PLANT | HOBBS, Lea, NM | Pass | State |
| 2021-12-28 | CUNNINGHAM STATION POWER PLANT | HOBBS, Lea, NM | Pass | State |
| 2021-12-28 | NINA CORTELL WEST FED COM TB | LOVING, Lea, NM | Pass | State |
| 2021-12-28 | IRON HORSE MIDSTREAM LLC / SILVER PIGEON COMPRESSOR STATION | NINNEKAH, Grady, OK | Pass | State |
| 2021-12-28 | TARGA PIPELINE MIDCONTINENT LLC / GOFF COMPRESSOR STATION | LITTLE CITY, Marshall, OK | Pass | State |
| 2021-12-28 | LARAMIE RIVER STATION (BASIN ELECTRIC POWER COOPERATIVE) — high-priority violation on file | WHEATLAND, Platte, WY | Pass | State |
| 2021-12-27 | JASCO CRUSHING 00632 | BUHL, Twin Falls, ID | Pass | State |
| 2021-12-27 | CARGILL LACTIC ACID PLANT | BLAIR, Washington, NE | Pass | State |
| 2021-12-27 | DR. LANA WHITE FACILITY | MALAGA, Eddy, NM | Pass | State |
| 2021-12-27 | MUSTANG GAS PRODUCTS LLC / BINGER GAS PLANT | BINGER, Caddo, OK | Pass | State |
| 2021-12-27 | 3M CO - GREYSTONE — high-priority violation on file | WAUSAU, Marathon, WI | Fail | State |
| 2021-12-23 | JOHNSON COMPRESSOR STATION | MANDAREE, McKenzie, ND | Pass | U.S. EPA |
| 2021-12-23 | JOHNSON COMPRESSOR STATION | MANDAREE, McKenzie, ND | Pass | U.S. EPA |
| 2021-12-23 | PUBLIC SERVICE CO - HAYDEN PLT | HAYDEN, Routt, CO | Pass | State |
| 2021-12-23 | SABINE PASS LNG LP AND SABINE PASS LIQUEFACTION LLC - SABINE PASS LNG TERMINAL | CAMERON, Cameron, LA | Pass | State |
| 2021-12-23 | SABINE PASS LNG LP AND SABINE PASS LIQUEFACTION LLC - SABINE PASS LNG TERMINAL | CAMERON, Cameron, LA | Pass | State |
| 2021-12-23 | CROWELL L&M #11 12 13 20 & 21 PRODUCTION FACILITY | PINE PRAIRIE, Evangeline, LA | Pass | State |
| 2021-12-23 | AMRIZE CEMENT INC. — high-priority violation on file | ALPENA, Alpena, MI | Pending | State |
| 2021-12-23 | BLACK RIVER GAS PROCESSING PLANT — high-priority violation on file | LOVING, Eddy, NM | Pass | State |
| 2021-12-23 | PPG - TESLIN | BARBERTON, Summit, OH | Pass | State |
| 2021-12-23 | ET GATHERING PROCESSING LLC / FRISCO COMPRESSOR STATION | CHICKASHA, Grady, OK | Pass | State |
| 2021-12-23 | RAUSCH CREEK GENERATION LLC/FRAILEY TWP — high-priority violation on file | TREMONT, Schuylkill, PA | Pass | State |
| 2021-12-23 | LPR ENERGY LLC/HENRY CLAY MIDSTREAM FAC | MARKLEYSBURG, Fayette, PA | Pass | State |
| 2021-12-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | KERN OIL & REFINING — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | FRITO-LAY NORTH AMERICA, INC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-12-22 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2021-12-22 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2021-12-22 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2021-12-22 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2021-12-22 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2021-12-22 | GRP MADISON, LLC — high-priority violation on file | COLBERT, Madison, GA | Pass | State |
| 2021-12-22 | HAMILTON CO COAL LLC | MCLEANSBORO, Hamilton, IL | Pass | State |
| 2021-12-22 | PVS TECHNOLOGIES INC — high-priority violation on file | PORTAGE, Porter, IN | Pass | State |
| 2021-12-22 | PVS TECHNOLOGIES INC — high-priority violation on file | PORTAGE, Porter, IN | Pass | State |
| 2021-12-22 | THOMAS CRUSHING (PORTABLE) | SHAWNEE, Johnson, KS | Pass | State |
| 2021-12-22 | SABINE PASS LNG LP AND SABINE PASS LIQUEFACTION LLC - SABINE PASS LNG TERMINAL | CAMERON, Cameron, LA | Pass | State |
| 2021-12-22 | GERDAU MACSTEEL MONROE MILL — high-priority violation on file | MONROE, Monroe, MI | Pass | State |
| 2021-12-22 | WESTERN SUGAR COOPERATIVE — high-priority violation on file | BILLINGS, Yellowstone, MT | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in 2021. It lists 35,950 stack tests recorded nationwide in 2021.