EPA Air · stack tests by county and year
Air-emissions stack tests in Sioux County, Iowa, 2025
- 5Stack 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 Sioux 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 Sioux County facility page.
Sioux County, Iowa, 2025
Air-emissions stack tests in Sioux County, other years
Air-emissions stack tests recorded in Sioux County, Iowa, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-09-18 | KENT NUTRITION GROUP - SHELDON | Pass | State |
| 2025-09-03 | WEST BRANCH RNG — high-priority violation on file | Pass | State |
| 2025-07-23 | SIOUXLAND ENERGY COOPERATIVE | Pass | State |
| 2025-07-23 | SIOUXLAND ENERGY COOPERATIVE | Pass | State |
| 2025-07-02 | KENT NUTRITION GROUP - SHELDON | Fail | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.