EPA Air · stack tests by county and year
Air-emissions stack tests in Polk County, Minnesota, 2026
- 7Stack 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 Polk County, Minnesota 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 Polk County facility page.
Air-emissions stack tests in Polk County, other years
Air-emissions stack tests recorded in Polk County, Minnesota, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-06-24 | RJ ZAVORAL AND SONS INC HMA PORTABLE PLANT 1 | Pass | State |
| 2026-05-20 | RJ ZAVORAL AND SONS INC NONMETALLIC PORTABLE CRUSHING PLANTS 1 AND 2 | Pass | State |
| 2026-04-28 | POLK COUNTY RESOURCE RECOVERY FACILITY | Pass | State |
| 2026-04-14 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | Pass | State |
| 2026-02-24 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | Fail | State |
| 2026-02-17 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | Pass | State |
| 2026-01-26 | AMERICAN CRYSTAL SUGAR - EAST GRAND FORKS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.