EPA Air · stack tests by state and year
Air-emissions stack tests in Michigan, 2026
- 207Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in Michigan during 2026; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in Michigan, 2026
- Wayne County 31
- St. Clair County 23
- Macomb County 14
- Monroe County 14
- Washtenaw County 10
- Alpena County 7
- Ingham County 7
- Kent County 7
- Kalamazoo County 6
- Ottawa County 6
- Allegan County 6
- Oakland County 5
- Dickinson County 5
- Manistee County 4
- Genesee County 4
- Berrien County 4
- Bay County 4
- Midland County 4
- Calhoun County 4
- Newaygo County 3
- Otsego County 3
- St. Joseph County 3
- Crawford County 3
- Charlevoix County 3
Michigan, other years
Air-emissions stack tests recorded in Michigan, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-01-22 | GLWA WATER RESOURCE RECOVERY FACILITY | DETROIT, Wayne, MI | Pass | State |
| 2026-01-21 | SUMPTER ENERGY ASSOCIATES, LLC | LENOX TOWNSHIP, Macomb, MI | Pass | State |
| 2026-01-16 | GREDE IRON MOUNTAIN, LLC — high-priority violation on file | KINGSFORD, Dickinson, MI | Pass | State |
| 2026-01-16 | ADAC AUTOMOTIVE MUSKEGON PLANTS | MUSKEGON, Muskegon, MI | Pass | State |
| 2026-01-15 | FCA US LLC - DETROIT ASSEMBLY COMPLEX — high-priority violation on file | DETROIT, Wayne, MI | Pass | State |
| 2026-01-15 | OAKLAND UNIVERSITY | ROCHESTER, Oakland, MI | Pass | State |
| 2026-01-08 | CONSUMERS ENERGY - MUSKEGON RIVER COMPRESSOR STATION | MARION, Clare, MI | Pass | State |
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Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.