EPA Air · stack tests by county and year
Air-emissions stack tests in Adams County, Iowa, 2025
- 3Stack 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 Adams 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 Adams County facility page.
Air-emissions stack tests in Adams County, other years
Air-emissions stack tests recorded in Adams County, Iowa, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-08-27 | POET BIOREFINING CORNING — high-priority violation on file | Pass | State |
| 2025-08-26 | POET BIOREFINING CORNING — high-priority violation on file | Pass | State |
| 2025-06-18 | BLACKTOP SERVICE CO. - MT ETNA | Pass | State |
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 Adams county, IA, for 2025. Stack tests recorded in 2025: 3.