EPA Air · stack tests by county and year
Air-emissions stack tests in Polk County, Iowa, 2026
- 14Stack 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 2026. 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, 2026
- Inspections 129
Air-emissions stack tests in Polk County, other years
Air-emissions stack tests recorded in Polk County, Iowa, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-06-18 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pass | Local |
| 2026-06-15 | KANSAS CITY SAUSAGE, LLC , DBA PINE RIDGE FARMS | Pass | Local |
| 2026-06-11 | MIDAMERICAN ENERGY COMPANY SYCAMORE CTS | Pass | Local |
| 2026-04-30 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Fail | Local |
| 2026-04-29 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pass | Local |
| 2026-04-15 | DES MOINES METRO WRA | Pass | Local |
| 2026-04-15 | DES MOINES METRO WRA | Pass | Local |
| 2026-04-14 | DES MOINES METRO WRA | Pass | Local |
| 2026-04-14 | DES MOINES METRO WRA | Pass | Local |
| 2026-04-03 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pending | Local |
| 2026-04-02 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pending | Local |
| 2026-04-02 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pending | Local |
| 2026-01-22 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pass | Local |
| 2026-01-22 | MICROSOFT CORPORATION - WILLOW CREEK/GINGER EAST DATA | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in Polk county, IA, in 2026. It lists 14 stack tests recorded in 2026.