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 |
|---|---|---|---|---|
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | GUARDIAN INDUSTRIES CORP | KINGSBURG, Fresno, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | AERA ENERGY LLC — high-priority violation on file | BAKERSFIELD, Kern, CA | Pass | Local |
| 2021-11-16 | BONANZA CREEK - WETCO FARMS A-4 PAD | KERSEY 4.8 MI. N OF, Weld, CO | Pass | State |
| 2021-11-16 | BONANZA CREEK - WETCO FARMS A-4 PAD | KERSEY 4.8 MI. N OF, Weld, CO | Pass | State |
| 2021-11-16 | BONANZA CREEK - WETCO FARMS A-4 PAD | KERSEY 4.8 MI. N OF, Weld, CO | Pass | State |
| 2021-11-16 | ALGONQUIN GAS TRANSMISSION, LLC - CROMWELL COMPRESSOR STATION | CROMWELL, Middlesex, CT | Pass | State |
| 2021-11-16 | ALGONQUIN GAS TRANSMISSION, LLC - CROMWELL COMPRESSOR STATION | CROMWELL, Middlesex, CT | Pass | State |
| 2021-11-16 | ALGONQUIN GAS TRANSMISSION, LLC - CROMWELL COMPRESSOR STATION | CROMWELL, Middlesex, CT | Pass | State |
| 2021-11-16 | MORTON SALT, INC. | CAPE CANAVERAL, Brevard, FL | Pass | State |
| 2021-11-16 | MORTON SALT, INC. | CAPE CANAVERAL, Brevard, FL | Pass | State |
| 2021-11-16 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2021-11-16 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2021-11-16 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
| 2021-11-16 | FLORIDA POWER & LIGHT COMPANY | PENSACOLA, Escambia, FL | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.