EPA Air · stack tests by county and year
Air-emissions stack tests in Wayne County, Michigan, 2026
- 31Stack 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 Wayne 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 Wayne County facility page.
Wayne County, Michigan, 2026
Air-emissions stack tests in Wayne County, other years
Air-emissions stack tests recorded in Wayne County, Michigan, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-27 | ST. MARYS CEMENT | Pass | State |
| 2026-06-26 | SUMPTER GENERATING PLANT | Pass | State |
| 2026-06-16 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-06-16 | GENERAL MOTORS LLC DETROIT-HAMTRAMCK ASSEMBLY | Pass | State |
| 2026-05-29 | LIFE TECHNOLOGIES CORPORATION | Pass | State |
| 2026-05-22 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-05-22 | LIFE TECHNOLOGIES CORPORATION | Pass | State |
| 2026-05-21 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-05-20 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-05-20 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-05-20 | FORD MOTOR COMPANY - FLAT ROCK ASSEMBLY | Pass | State |
| 2026-05-19 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-05-15 | FORD MOTOR COMPANY WAYNE COMPLEX | Pass | State |
| 2026-05-13 | AIR PRODUCTS AND CHEMICALS, INC. | Pass | State |
| 2026-04-29 | DETROIT THERMAL BEACON HEATING PLANT | Pass | State |
| 2026-04-23 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-04-23 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-04-22 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-04-22 | EES COKE BATTERY, LLC — high-priority violation on file | Pass | State |
| 2026-04-21 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-04-17 | EES COKE BATTERY, LLC — high-priority violation on file | Pass | State |
| 2026-04-15 | EES COKE BATTERY, LLC — high-priority violation on file | Pass | State |
| 2026-04-10 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-04-07 | ST. MARYS CEMENT | Pass | State |
| 2026-03-20 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-03-19 | DETROIT METROPOLITAN WAYNE COUNTY AIRPORT | Pass | State |
| 2026-03-18 | BUCKEYE PARTNER'S, L.P. EAST TERMINAL | Pass | State |
| 2026-03-17 | MARATHON PETROLEUM COMPANY LP — high-priority violation on file | Pass | State |
| 2026-01-27 | CANTON RENEWABLES LLC | Pass | State |
| 2026-01-22 | GLWA WATER RESOURCE RECOVERY FACILITY | Pass | State |
| 2026-01-15 | FCA US LLC - DETROIT ASSEMBLY COMPLEX — 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.
What this page shows
This page covers Clean Air Act facilities in the EPA air register, listing stack tests in Wayne county, MI for 2026. It records 31 stack tests for 2026.