EPA Air · stack tests by county and year
Air-emissions stack tests in Washtenaw County, Michigan, 2026
- 10Stack 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 Washtenaw County, Michigan 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 Washtenaw County facility page.
Washtenaw County, Michigan, 2026
- Inspections 17
Air-emissions stack tests in Washtenaw County, other years
Air-emissions stack tests recorded in Washtenaw County, Michigan, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-29 | ARBOR HILLS LANDFILL, INC. — high-priority violation on file | Pass | State |
| 2026-06-30 | TOYOTA MOTOR NORTH AMERICA R&D | Pass | State |
| 2026-06-26 | EASTERN MI UNIVERSITY — high-priority violation on file | Pass | State |
| 2026-06-17 | UNIVERSITY OF MICHIGAN | Pass | State |
| 2026-06-02 | DTE GAS COMPANY - WILLOW RUN COMPRESSOR STATION | Pass | State |
| 2026-05-08 | CONSUMERS ENERGY - FREEDOM COMPRESSOR STATION | Pass | State |
| 2026-05-05 | CONSUMERS ENERGY - FREEDOM COMPRESSOR STATION | Pass | State |
| 2026-04-29 | DTE GAS COMPANY - WILLOW RUN COMPRESSOR STATION | Pass | State |
| 2026-04-08 | DTE GAS COMPANY - WILLOW RUN COMPRESSOR STATION | Pass | State |
| 2026-02-20 | UNIVERSITY OF MICHIGAN | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.