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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register and stack tests in Davison county, SD, for 2026. It lists 11 stack tests recorded in 2026.