EPA Air · stack tests by county and year
Air-emissions stack tests in Union County, Ohio, 2025
- 15Stack 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 Union County, Ohio 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 Union County facility page.
Union County, Ohio, 2025
Air-emissions stack tests in Union County, other years
Air-emissions stack tests recorded in Union County, Ohio, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-07-24 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | Fail | State |
| 2025-07-24 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | Pass | State |
| 2025-07-24 | HONDA DEV & MFG OF AMERICA, LLC, MARYSVILLE AUTO PLANT — high-priority violation on file | Pass | State |
| 2025-04-09 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-09 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-09 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-09 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-09 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-09 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-08 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-08 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-08 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-08 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-08 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
| 2025-04-08 | HONDA DEVELOPMENT & MANUFACTURING OF AMERICA, LLC - ADC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.