EPA Air · stack tests by county and year
Air-emissions stack tests in Tuscola County, Michigan, 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 Tuscola 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 Tuscola County facility page.
Tuscola County, Michigan, 2025
Air-emissions stack tests in Tuscola County, other years
Air-emissions stack tests recorded in Tuscola County, Michigan, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-03 | MICHIGAN SUGAR COMPANY-CARO FACTORY — high-priority violation on file | Pass | State |
| 2025-11-04 | POET BIOREFINING - CARO, LLC | Pass | State |
| 2025-10-28 | MICHIGAN SUGAR COMPANY-CARO FACTORY — high-priority violation on file | Pass | State |
| 2025-05-15 | POET BIOREFINING - CARO, LLC | Pass | State |
| 2025-01-02 | MICHIGAN SUGAR COMPANY-CARO 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.