EPA Air · stack tests by county and year
Air-emissions stack tests in Floyd County, Iowa, 2025
- 6Stack 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 Floyd County, Iowa 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 Floyd County facility page.
Floyd County, Iowa, 2025
Air-emissions stack tests in Floyd County, other years
Air-emissions stack tests recorded in Floyd County, Iowa, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-13 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | Pass | State |
| 2025-11-13 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | Pass | State |
| 2025-11-11 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | Pass | State |
| 2025-06-12 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | Pass | State |
| 2025-06-12 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | Pass | State |
| 2025-06-10 | VALERO RENEWABLE FUELS LLC-CHARLES CITY | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.