EPA Air · stack tests by county and year
Air-emissions stack tests in Woodbury County, Iowa, 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 Woodbury 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 Woodbury County facility page.
Woodbury County, Iowa, 2025
Air-emissions stack tests in Woodbury County, other years
Air-emissions stack tests recorded in Woodbury County, Iowa, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-16 | CF INDUSTRIES NITROGEN LLC - PORT NEAL NITROGEN COMPLEX — high-priority violation on file | Fail | State |
| 2025-11-25 | SEABOARD TRIUMPH FOODS, LLC — high-priority violation on file | Pass | State |
| 2025-08-20 | CF INDUSTRIES NITROGEN LLC - PORT NEAL NITROGEN COMPLEX — high-priority violation on file | Fail | State |
| 2025-07-29 | MID AMERICAN ENERGY CO-SERGEANT BLUFF | Pass | State |
| 2025-07-29 | MID AMERICAN ENERGY CO-SERGEANT BLUFF | Pass | State |
| 2025-07-09 | KNIFE RIVER MIDWEST LLC-SIOUX CITY-PLT#4 — high-priority violation on file | Pass | State |
| 2025-05-15 | BARKLEY ASPHALT INC | Fail | State |
| 2025-03-25 | CF INDUSTRIES NITROGEN LLC - PORT NEAL NITROGEN COMPLEX — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.