EPA Air · stack tests by county and year
Air-emissions stack tests in Monroe County, Michigan, 2025
- 18Stack 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 Monroe 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 Monroe County facility page.
Monroe County, Michigan, 2025
- Inspections 22
Air-emissions stack tests in Monroe County, other years
Air-emissions stack tests recorded in Monroe County, Michigan, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-19 | GERDAU MACSTEEL MONROE MILL — high-priority violation on file | Pass | State |
| 2025-12-10 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-12-05 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-12-05 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-12-03 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-11-19 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-09-26 | GERDAU MACSTEEL MONROE MILL — high-priority violation on file | Pass | State |
| 2025-09-10 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-07-16 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-05-30 | GUARDIAN INDUSTRIES-CARLETON | Pass | State |
| 2025-04-24 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-04-23 | GERDAU MACSTEEL MONROE MILL — high-priority violation on file | Pass | State |
| 2025-04-09 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-03-05 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-02-28 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-02-20 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-01-31 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
| 2025-01-29 | DTE ELECTRIC COMPANY - MONROE POWER PLANT | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.