EPA Air · stack tests by county and year
Air-emissions stack tests in Snohomish County, Washington, 2026
- 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 Snohomish County, Washington 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 Snohomish County facility page.
Snohomish County, Washington, 2026
- Inspections 110
Air-emissions stack tests in Snohomish County, other years
Air-emissions stack tests recorded in Snohomish County, Washington, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-03-18 | HAMPTON LUMBER MILLS-WASHINGTON INC | Pass | Local |
| 2026-03-18 | HAMPTON LUMBER MILLS-WASHINGTON INC | Pass | Local |
| 2026-03-18 | HAMPTON LUMBER MILLS-WASHINGTON INC | Pass | Local |
| 2026-03-18 | HAMPTON LUMBER MILLS-WASHINGTON INC | Pass | Local |
| 2026-02-09 | CEDAR GROVE COMPOSTING, INC | Fail | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.