EPA Air · stack tests by county and year
Air-emissions stack tests in Frederick County, Virginia, 2025
- 6Stack 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 Frederick 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 Frederick County facility page.
Frederick County, Virginia, 2025
- Inspections 68
Air-emissions stack tests in Frederick County, other years
Air-emissions stack tests recorded in Frederick County, Virginia, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-12-10 | FREDERICK COUNTY REGIONAL LANDFILL | Pass | State |
| 2025-11-20 | TREX COMPANY, INC. - VIRGINIA DECKING AND RAILING | Pass | State |
| 2025-09-18 | LEWIN ASPHALT INC - PORTABLE 81715 | Pass | State |
| 2025-08-06 | O-N MINERALS (CHEMSTONE) COMPANY PORTABLE 81809 | Pass | State |
| 2025-04-15 | KINGSPAN INSULATION LLC | Pass | State |
| 2025-03-04 | HP HOOD LLC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.