EPA Air · stack tests by county and year
Air-emissions stack tests in Northwest Arctic County, Alaska, 2025
- 4Stack 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 Northwest Arctic County, Alaska 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 Northwest Arctic County facility page.
Northwest Arctic County, Alaska, 2025
- Inspections 21
Air-emissions stack tests in Northwest Arctic County, other years
Air-emissions stack tests recorded in Northwest Arctic County, Alaska, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-08-24 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | Pass | State |
| 2025-08-24 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | Pass | State |
| 2025-08-24 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | Pass | State |
| 2025-05-21 | TECK ALASKA, INC. (TECK) / RED DOG MINE — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.