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 |
|---|---|---|---|---|
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | HILMAR CHEESE COMPANY — high-priority violation on file | HILMAR, Merced, CA | Pass | Local |
| 2021-10-20 | WILLIAMS FIELD - WILLOW CREEK GAS PLANT — high-priority violation on file | RIO BLANCO 18 MILES W OF, Rio Blanco, CO | Pass | State |
| 2021-10-20 | WILLIAMS FIELD - WILLOW CREEK GAS PLANT — high-priority violation on file | RIO BLANCO 18 MILES W OF, Rio Blanco, CO | Pass | State |
| 2021-10-20 | CITY OF NORWALK 3RD TAXING DISTRICT | CONNECTICUT, Undetermined, CT | Pass | State |
| 2021-10-20 | CITY OF NORWALK 3RD TAXING DISTRICT | CONNECTICUT, Undetermined, CT | Pass | State |
| 2021-10-20 | CITY OF NORWALK 3RD TAXING DISTRICT | CONNECTICUT, Undetermined, CT | Pass | State |
| 2021-10-20 | CRODA, INC — high-priority violation on file | NEW CASTLE, New Castle, DE | Pass | State |
| 2021-10-20 | CRODA, INC — high-priority violation on file | NEW CASTLE, New Castle, DE | Pass | State |
| 2021-10-20 | CRODA, INC — high-priority violation on file | NEW CASTLE, New Castle, DE | Pass | State |
| 2021-10-20 | CRODA, INC — high-priority violation on file | NEW CASTLE, New Castle, DE | N/A | State |
| 2021-10-20 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-20 | MIAMI-DADE WATER AND SEWER DEPARTMENT | MIAMI, Miami-Dade, FL | Pass | State |
| 2021-10-20 | CEMEX CONSTRUCTION MATERIALS FLORIDA,LLC | BROOKSVILLE, Hernando, FL | Pass | State |
| 2021-10-20 | CEMEX CONSTRUCTION MATERIALS FLORIDA,LLC | BROOKSVILLE, Hernando, FL | Pass | State |
| 2021-10-20 | GEORGIA-PACIFIC PALATKA LLC — high-priority violation on file | PALATKA, Putnam, FL | Pass | State |
| 2021-10-20 | GEORGIA-PACIFIC PALATKA LLC — high-priority violation on file | PALATKA, Putnam, FL | Pass | State |
| 2021-10-20 | GEORGIA-PACIFIC PALATKA LLC — high-priority violation on file | PALATKA, Putnam, FL | Pass | State |
| 2021-10-20 | GEORGIA-PACIFIC PALATKA LLC — high-priority violation on file | PALATKA, Putnam, FL | Pass | State |
| 2021-10-20 | GERDAU AMERISTEEL US INC. | CARTERSVILLE, Bartow, GA | Pass | State |
| 2021-10-20 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2021-10-20 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2021-10-20 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2021-10-20 | GEORGIA POWER CO. - PLANT MCDONOUGH- ATKINSON | ATLANTA, Cobb, GA | Pass | State |
| 2021-10-20 | GEORGIA-PACIFIC CEDAR SPRINGS LLC | CEDAR SPRINGS, Early, GA | Pass | State |
| 2021-10-20 | GEORGIA-PACIFIC CEDAR SPRINGS LLC | CEDAR SPRINGS, Early, GA | Pass | State |
| 2021-10-20 | VULCAN CONSTRUCTION MATERIALS, LLC. - DAHLONEGA II QUARRY | DAHLONEGA, Lumpkin, GA | Pass | State |
| 2021-10-20 | MECO - MAALAEA | MAALAEA, Maui, HI | Pass | State |
| 2021-10-20 | CLOW VALVE COMPANY | OSKALOOSA, Mahaska, IA | Pass | State |
| 2021-10-20 | CLOW VALVE COMPANY | OSKALOOSA, Mahaska, IA | Pass | State |
| 2021-10-20 | CLOW VALVE COMPANY | OSKALOOSA, Mahaska, IA | Pass | State |
| 2021-10-20 | IPL-PRAIRIE CREEK STATION | CEDAR RAPIDS, Linn, IA | Pass | Local |
| 2021-10-20 | HEIDELBERG MATERIALS US CEMENT LLC — high-priority violation on file | MITCHELL, Lawrence, IN | Pass | State |
| 2021-10-20 | NOVELIS CORPORATION | TERRE HAUTE, Vigo, IN | Pass | State |
| 2021-10-20 | NOVELIS CORPORATION | TERRE HAUTE, Vigo, IN | Pass | State |
| 2021-10-20 | AMPACET CORPORATION | TERRE HAUTE, Vigo, IN | Pass | State |
| 2021-10-20 | AMPACET CORPORATION | TERRE HAUTE, Vigo, IN | Pass | State |
| 2021-10-20 | AMPACET CORPORATION | TERRE HAUTE, Vigo, IN | Pass | State |
| 2021-10-20 | AMPACET CORPORATION | TERRE HAUTE, Vigo, IN | Pass | State |
| 2021-10-20 | TEXAS GAS TRANSMISSION, LLC | LOUISVILLE, Jefferson, KY | Pass | Local |
| 2021-10-20 | CITY OF BATH LANDFILL | BATH, Sagadahoc, ME | Pass | State |
| 2021-10-20 | DTE ST. CLAIR / BELLE RIVER POWER PLANT — high-priority violation on file | CHINA, St. Clair, MI | Pass | State |
| 2021-10-20 | FLINT HILLS RESOURCES PINE BEND REFINERY | ROSEMOUNT, Dakota, MN | Pass | State |
| 2021-10-20 | BAYER CROPSCIENCE | KANSAS CITY, Jackson, MO | Pass | State |
| 2021-10-20 | COLUMBIA GULF TRANSMISSION LLC, INVERNESS COMPRESSOR STATION | INVERNESS, Humphreys, MS | Pass | State |
| 2021-10-20 | COLUMBIA GULF TRANSMISSION LLC, INVERNESS COMPRESSOR STATION | INVERNESS, Humphreys, MS | Pass | State |
| 2021-10-20 | COLUMBIA GULF TRANSMISSION LLC, INVERNESS COMPRESSOR STATION | INVERNESS, Humphreys, MS | Pass | State |
| 2021-10-20 | COLUMBIA GULF TRANSMISSION LLC, INVERNESS COMPRESSOR STATION | INVERNESS, Humphreys, MS | Pass | State |
| 2021-10-20 | GLOBAL CELLULOSE FIBERS - RIEGELWOOD MILL | RIEGELWOOD, Columbus, NC | Pass | State |
| 2021-10-20 | WEST FRASER, INC. - ARMOUR LUMBER MILL | RIEGELWOOD, Columbus, NC | Pass | State |
| 2021-10-20 | GREDE II - BISCOE, LLC — high-priority violation on file | BISCOE, Montgomery, NC | Pending | State |
| 2021-10-20 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-20 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-20 | ENTERPRISE - OXY SAND DUNES NORTH COMPRESSOR STATION | LOVING, Eddy, NM | Pass | State |
| 2021-10-20 | SALL'S BROTHERS CONSTRUCTION | ALBUQUERQUE, Bernalillo, NM | Fail | Local |
| 2021-10-20 | ENGIE BUCKEYE OPERATIONS LLC | COLUMBUS, Franklin, OH | Pass | State |
| 2021-10-20 | ENGIE BUCKEYE OPERATIONS LLC | COLUMBUS, Franklin, OH | Pass | State |
| 2021-10-20 | ENGIE BUCKEYE OPERATIONS LLC | COLUMBUS, Franklin, OH | Pass | State |
| 2021-10-20 | ENGIE BUCKEYE OPERATIONS LLC | COLUMBUS, Franklin, OH | Pass | State |
| 2021-10-20 | ENGIE BUCKEYE OPERATIONS LLC | COLUMBUS, Franklin, OH | Pass | State |
| 2021-10-20 | ENGIE BUCKEYE OPERATIONS LLC | COLUMBUS, Franklin, OH | Pass | State |
| 2021-10-20 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2021-10-20 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2021-10-20 | GREEN CIRCLE GROWERS — high-priority violation on file | OBERLIN, Lorain, OH | Pass | State |
| 2021-10-20 | ERIE MATERIALS | SANDUSKY, Erie, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
| 2021-10-20 | LONG RIDGE ENERGY GENERATION LLC - HANNIBAL POWER | HANNIBAL, Monroe, OH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.