EPA Air · stack tests by county and year
Air-emissions stack tests in St. Louis County, Missouri, 2025
- 8Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in St. Louis County, Missouri during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the St. Louis County facility page.
St. Louis County, Missouri, 2025
Air-emissions stack tests in St. Louis County, other years
Air-emissions stack tests recorded in St. Louis County, Missouri, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-10 | THE BOEING COMPANY | Pass | State |
| 2025-12-10 | THE BOEING COMPANY | Pass | State |
| 2025-07-08 | MISSOURI ASPHALT PRODUCTS | Pass | State |
| 2025-05-16 | MISSOURI ASPHALT PRODUCTS | Fail | State |
| 2025-04-23 | METROPOLITAN ST. LOUIS SEWER DISTRICT | Pass | State |
| 2025-04-22 | METROPOLITAN ST. LOUIS SEWER DISTRICT | Pass | State |
| 2025-01-15 | THE BOEING COMPANY | Pass | State |
| 2025-01-15 | THE BOEING COMPANY | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.