EPA Air · stack tests by county and year
Air-emissions stack tests in Columbia County, Wisconsin, 2026
- 6Stack 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 Columbia County, Wisconsin 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 Columbia County facility page.
Columbia County, Wisconsin, 2026
Air-emissions stack tests in Columbia County, other years
Air-emissions stack tests recorded in Columbia County, Wisconsin, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-04-14 | ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER | Pass | State |
| 2026-04-13 | ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER | Pass | State |
| 2026-04-07 | ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER | Pass | State |
| 2026-04-06 | ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER | Pass | State |
| 2026-02-10 | UNITED WISCONSIN GRAIN PRODUCERS, LLC — high-priority violation on file | Pass | State |
| 2026-01-20 | ALLIANT ENERGY - WPL - COLUMBIA ENERGY CENTER | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.