EPA Air · stack tests by county and year
Air-emissions stack tests in St. Charles County, Louisiana, 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 St. Charles County, Louisiana 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 St. Charles County facility page.
St. Charles County, Louisiana, 2025
Air-emissions stack tests in St. Charles County, other years
Air-emissions stack tests recorded in St. Charles County, Louisiana, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-18 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-06-17 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-05-01 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-05-01 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-05-01 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-05-01 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-04-30 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-04-30 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-04-29 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-04-29 | VALERO REFINING - NEW ORLEANS LLC - ST CHARLES REFINERY | Pass | State |
| 2025-03-12 | ADM GRAIN RIVER SYSTEM INC - AMA GRAIN ELEVATOR FACILITY | Fail | State |
| 2025-01-16 | UNION CARBIDE CORP - ST CHARLES OPERATIONS | Fail | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.