EPA Air · stack tests by county and year
Air-emissions stack tests in Humboldt County, California, 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 Humboldt County, California 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 Humboldt County facility page.
Air-emissions stack tests in Humboldt County, other years
Air-emissions stack tests recorded in Humboldt County, California, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-08-08 | HUMBOLDT SAWMILL COMPANY — high-priority violation on file | Pass | Local |
| 2025-08-07 | HUMBOLDT SAWMILL COMPANY — high-priority violation on file | Pass | Local |
| 2025-08-06 | HUMBOLDT SAWMILL COMPANY — high-priority violation on file | Pass | Local |
| 2025-08-05 | HUMBOLDT SAWMILL COMPANY — high-priority violation on file | Pass | Local |
| 2025-06-18 | HUMBOLDT SAWMILL COMPANY — high-priority violation on file | Pass | Local |
| 2025-06-17 | HUMBOLDT SAWMILL COMPANY — high-priority violation on file | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.