EPA Air · stack tests by year
Air-emissions stack tests in 2026
- 11,110Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
States, 2026
- Ohio 1,474
- Indiana 1,010
- California 979
- Florida 795
- Wyoming 755
- New Mexico 724
- Georgia 509
- Pennsylvania 501
- Arkansas 374
- Alabama 357
- Missouri 326
- Texas 316
- Mississippi 263
- Michigan 207
- North Carolina 188
- Colorado 185
- Iowa 167
- Illinois 165
- South Carolina 135
- Wisconsin 135
- West Virginia 114
- Virginia 98
- Idaho 96
- Montana 91
- Tennessee 84
- Minnesota 84
- Delaware 73
- Kentucky 71
- Arizona 71
- Connecticut 68
- Kansas 63
- Nevada 57
- Massachusetts 54
- North Dakota 52
- Nebraska 51
- Utah 51
- Washington 46
- Alaska 45
- New York 43
- South Dakota 34
- District of Columbia 30
- New Hampshire 29
- Maryland 28
- Oregon 27
- Louisiana 26
- Hawaii 21
- Oklahoma 15
- Rhode Island 13
- Puerto Rico 5
- Maine 5
Other years
Air-emissions stack tests recorded in 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
| 2026-05-20 | CAPITAL MATERIALS | OZARK, Christian, MO | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.