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.