EPA Air · stack tests by county and year
Air-emissions stack tests in Beadle County, South Dakota, 2025
- 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 Beadle County, South Dakota 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 Beadle County facility page.
Beadle County, South Dakota, 2025
Air-emissions stack tests in Beadle County, other years
Air-emissions stack tests recorded in Beadle County, South Dakota, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-25 | REDFIELD ENERGY LLC — high-priority violation on file | Pass | State |
| 2025-11-04 | HURON ENERGY LLC, DBA GLACIAL LAKES ENERGY LLC — high-priority violation on file | Pass | State |
| 2025-10-07 | NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - HURON | Pass | State |
| 2025-07-17 | HURON ENERGY LLC, DBA GLACIAL LAKES ENERGY LLC — high-priority violation on file | Fail | State |
| 2025-05-13 | NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - HURON | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.