EPA Air · stack tests by county and year
Air-emissions stack tests in Portsmouth (city) County, Virginia, 2025
- 5Stack 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 Portsmouth (city) County, Virginia 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 Portsmouth (city) County facility page.
Portsmouth (city) County, Virginia, 2025
- Inspections 51
Air-emissions stack tests in Portsmouth (city) County, other years
- 2024 3
Air-emissions stack tests recorded in Portsmouth (city) County, Virginia, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-08-06 | ADVANSIX PORTSMOUTH PLANT | Pass | State |
| 2025-07-29 | US NAVY - NORFOLK NAVAL SHIPYARD | Pass | State |
| 2025-06-18 | US NAVY - NORFOLK NAVAL SHIPYARD | Pass | State |
| 2025-03-24 | US NAVY - NORFOLK NAVAL SHIPYARD | Pass | State |
| 2025-03-24 | US NAVY - NORFOLK NAVAL SHIPYARD | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.