EPA Air · stack tests by county and year
Air-emissions stack tests in Davison County, South Dakota, 2026
- 11Stack 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 Davison County, South Dakota 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 Davison County facility page.
Davison County, South Dakota, 2026
Air-emissions stack tests in Davison County, other years
Air-emissions stack tests recorded in Davison County, South Dakota, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-06-24 | POET BIOREFINING - MITCHELL LLC | Pass | State |
| 2026-06-23 | POET BIOREFINING - MITCHELL LLC | Pass | State |
| 2026-03-30 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-03-10 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-12 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-10 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-09 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-07 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-05 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-04 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
| 2026-02-03 | HIGH PLAINS PROCESSING, LLC, A DELAWARE LIMITED LIABILITY | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.