EPA Air · stack tests by county and year
Air-emissions stack tests in Washtenaw County, Michigan, 2025
- 12Stack 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 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 Washtenaw County facility page.
Washtenaw County, Michigan, 2025
- Inspections 20
Air-emissions stack tests in Washtenaw County, other years
Air-emissions stack tests recorded in Washtenaw County, Michigan, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-10 | YPSILANTI COMMUNITY UTILITIES AUTHORITY | Pass | State |
| 2025-12-10 | YPSILANTI COMMUNITY UTILITIES AUTHORITY | Pass | State |
| 2025-10-15 | UNIVERSITY OF MICHIGAN | Pass | State |
| 2025-10-14 | HYUNDAI AMERICA TECHNICAL CENTER INC. (HATCI) | Pass | State |
| 2025-10-07 | UNIVERSITY OF MICHIGAN | Pass | State |
| 2025-08-28 | ARBOR HILLS ENERGY, LLC | Pass | State |
| 2025-06-19 | CONSUMERS ENERGY - FREEDOM COMPRESSOR STATION | Pass | State |
| 2025-05-15 | DTE GAS COMPANY - WILLOW RUN COMPRESSOR STATION | Pass | State |
| 2025-05-12 | DTE GAS COMPANY - WILLOW RUN COMPRESSOR STATION | Pass | State |
| 2025-03-14 | UNIVERSITY OF MICHIGAN | Pass | State |
| 2025-01-03 | UNIVERSITY OF MICHIGAN | Pass | State |
| 2025-01-03 | AVL POWERTRAIN ENGINEERING | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.