EPA Air · stack tests by county and year
Air-emissions stack tests in Woodbury County, Iowa, 2026
- 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 Woodbury 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 Woodbury County facility page.
Woodbury County, Iowa, 2026
Air-emissions stack tests in Woodbury County, other years
Air-emissions stack tests recorded in Woodbury County, Iowa, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-19 | BARKLEY ASPHALT INC | Pass | State |
| 2026-04-30 | SIOUX CITY BRICK & TILE CO | Pass | State |
| 2026-04-28 | CARGILL ANIMAL NUTRITION - SIOUX CITY — high-priority violation on file | Fail | State |
| 2026-03-10 | SEABOARD TRIUMPH FOODS, LLC — high-priority violation on file | Fail | State |
| 2026-03-03 | 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.