EPA Air · stack tests by county and year
Air-emissions stack tests in Spokane County, Washington, 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 Spokane County, Washington 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 Spokane County facility page.
Spokane County, Washington, 2025
Air-emissions stack tests in Spokane County, other years
Air-emissions stack tests recorded in Spokane County, Washington, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-06 | KAISER ALUMINUM WASHINGTON, LLC | Pass | Local |
| 2025-10-30 | KAISER ALUMINUM WASHINGTON, LLC | Fail | Local |
| 2025-10-06 | NORTHSIDE LANDFILL | Pass | Local |
| 2025-09-11 | KAISER ALUMINUM WASHINGTON, LLC | Pass | Local |
| 2025-06-12 | WASTE TO ENERGY | Pass | Local |
| 2025-03-20 | KAISER ALUMINUM WASHINGTON, LLC | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.