EPA Air · stack tests by state and year
Air-emissions stack tests in Missouri, 2026
- 326Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Missouri during 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Missouri, 2026
- Christian County 105
- Undetermined County 46
- Greene County 38
- Buchanan County 20
- Ste. Genevieve County 17
- Johnson County 12
- Lincoln County 11
- Jackson County 10
- Ralls County 8
- Boone County 6
- Jefferson County 6
- St. Louis County 5
- Barton County 4
- Holt County 4
- Pettis County 4
- St. Louis (city) County 3
- Pike County 3
- St. Charles County 3
- Cass County 3
- Randolph County 3
Missouri, other years
Air-emissions stack tests recorded in Missouri, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-08-18 | CAPITAL MATERIALS-PROSIZER (PORT-0836) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-18 | CAPITAL MATERIALS-PROSIZER (PORT-0836) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-08-05 | HORNERS ROCK MATERIAL LLC (PORT-0942) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-07-23 | MID STATES MATERIALS LLC | STRAFFORD, Greene, MO | Pass | State |
| 2026-06-23 | EVERGY-HAWTHORN GENERATING STATION | KANSAS CITY, Jackson, MO | Pass | State |
| 2026-06-23 | EVERGY-HAWTHORN GENERATING STATION | KANSAS CITY, Jackson, MO | Pass | State |
| 2026-06-23 | EVERGY-HAWTHORN GENERATING STATION | KANSAS CITY, Jackson, MO | N/A | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | AMRIZE CEMENT INC | BLOOMSDALE, Ste. Genevieve, MO | Pass | State |
| 2026-06-16 | EMERY SAPP AND SONS INC. - ASPHALT-PLANT 10 (PORT-0950) | PORTABLE, Undetermined, MO | Pass | State |
| 2026-06-12 | TAMKO BUILDING PRODUCTS, INC. | JOPLIN, Jasper, MO | Pass | State |
| 2026-06-11 | SOUTHWEST CLEAN WATER PLANT SPRINGFIELD | SPRINGFIELD, Greene, MO | Fail | State |
| 2026-06-11 | SOUTHWEST CLEAN WATER PLANT SPRINGFIELD | SPRINGFIELD, Greene, MO | Fail | State |
| 2026-06-11 | SOUTHWEST CLEAN WATER PLANT SPRINGFIELD | SPRINGFIELD, Greene, MO | Fail | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Pass | State |
| 2026-05-28 | NEW FRONTIER MATERIALS - BEDROCK QUARRY | TROY, Lincoln, MO | Fail | State |
| 2026-05-27 | SPECIALTY GRANULES | ANNAPOLIS, Iron, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE CO-EWING PLANT CS 36 | EWING, Lewis, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE CO-EWING PLANT CS 36 | EWING, Lewis, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE COMPANY - HUNTINGTON PLANT | HANNIBAL, Ralls, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE COMPANY - HUNTINGTON PLANT | HANNIBAL, Ralls, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE COMPANY - HUNTINGTON PLANT | HANNIBAL, Ralls, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE COMPANY - HUNTINGTON PLANT | HANNIBAL, Ralls, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE COMPANY - HUNTINGTON PLANT | HANNIBAL, Ralls, MO | Pass | State |
| 2026-05-26 | CENTRAL STONE COMPANY - HUNTINGTON PLANT | HANNIBAL, Ralls, MO | Pass | State |
| 2026-05-21 | HEARTLAND TRUSS | PLATTSBURG, Clinton, MO | Pass | State |
| 2026-05-21 | HEARTLAND TRUSS | PLATTSBURG, Clinton, 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 |
Page 1 of 4NextPage 2
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.