EPA Air · stack tests by county and year
Air-emissions stack tests in Polk County, Iowa, 2025
- 16Stack 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 Polk 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 Polk County facility page.
Polk County, Iowa, 2025
- Inspections 304
Air-emissions stack tests in Polk County, other years
Air-emissions stack tests recorded in Polk County, Iowa, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-06 | METRO METHANE RECOVERY | Pass | Local |
| 2025-11-06 | METRO METHANE RECOVERY | Pass | Local |
| 2025-11-06 | METRO METHANE RECOVERY | Pass | Local |
| 2025-11-06 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
| 2025-10-09 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
| 2025-09-09 | ARCHER DANIELS MIDLAND DM SOYBEAN PLANT | Pass | Local |
| 2025-09-04 | MIDAMERICAN ENERGY CO PLEASANT HILL GDMEC | Pass | Local |
| 2025-09-03 | MIDAMERICAN ENERGY CO PLEASANT HILL GDMEC | Pass | Local |
| 2025-07-22 | BRIDGESTONE AMERICAS TIRE OPERATIONS | Pass | Local |
| 2025-07-21 | ARCHER DANIELS MIDLAND DM SOYBEAN PLANT | Pass | Local |
| 2025-05-01 | ARCHER DANIELS MIDLAND DM SOYBEAN PLANT | Fail | Local |
| 2025-05-01 | ARCHER DANIELS MIDLAND DM SOYBEAN PLANT | Pass | Local |
| 2025-03-26 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
| 2025-03-25 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
| 2025-01-31 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
| 2025-01-08 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.