EPA Air · stack tests by county and year
Air-emissions stack tests in Huron County, Michigan, 2025
- 4Stack 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 Huron County, Michigan 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 Huron County facility page.
Air-emissions stack tests in Huron County, other years
Air-emissions stack tests recorded in Huron County, Michigan, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-09-25 | HURON CASTING, INC (BLUE DIAMOND STEEL CASTING) | Pass | State |
| 2025-09-03 | CORTEVA LLC — high-priority violation on file | Pass | State |
| 2025-03-25 | HURON CASTING, INC (BLUE DIAMOND STEEL CASTING) | Pass | State |
| 2025-01-10 | MICHIGAN SUGAR COMPANY - SEBEWAING FACTORY — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.