EPA Air · stack tests by county and year
Air-emissions stack tests in Richland County, Ohio, 2026
- 24Stack 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 Richland County, Ohio 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 Richland County facility page.
Richland County, Ohio, 2026
- Inspections 12
Air-emissions stack tests in Richland County, other years
Air-emissions stack tests recorded in Richland County, Ohio, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-07-08 | MAR-ZANE, INC. PLANT #21 | Pass | State |
| 2026-04-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-04-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-04-14 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | Pass | State |
| 2026-02-24 | PAVONIA COMPRESSOR STATION | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | Pass | State |
| 2026-02-18 | LUCAS COMPRESSOR STATION — high-priority violation on file | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
| 2026-01-15 | CLEVELAND-CLIFFS, INC. - MANSFIELD OPERATIONS | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.