EPA Air · stack tests by county and year
Air-emissions stack tests in King County, Washington, 2025
- 25Stack 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 King 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 King County facility page.
King County, Washington, 2025
- Inspections 756
Air-emissions stack tests in King County, other years
Air-emissions stack tests recorded in King County, Washington, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-05 | BOEING DEVELOPMENTAL CENTER | Pass | Local |
| 2025-11-04 | BOEING DEVELOPMENTAL CENTER | Pass | Local |
| 2025-11-04 | BOEING DEVELOPMENTAL CENTER | Pass | Local |
| 2025-11-04 | BOEING DEVELOPMENTAL CENTER | Pass | Local |
| 2025-11-03 | FRANZ SEATTLE DIVISION - WELLER ST. | Pass | Local |
| 2025-10-06 | CEDAR GROVE COMPOST CO | Pass | Local |
| 2025-10-06 | CEDAR GROVE COMPOST CO | Pass | Local |
| 2025-09-03 | AEROJET ROCKETDYNE, INC. | Pass | Local |
| 2025-09-03 | AEROJET ROCKETDYNE, INC. | Pass | Local |
| 2025-07-19 | NUCOR STEEL SEATTLE INC | Pass | Local |
| 2025-07-19 | NUCOR STEEL SEATTLE INC | Pass | Local |
| 2025-07-19 | NUCOR STEEL SEATTLE INC | Pass | Local |
| 2025-07-19 | NUCOR STEEL SEATTLE INC | Pass | Local |
| 2025-07-19 | NUCOR STEEL SEATTLE INC | Pass | Local |
| 2025-06-02 | STONEWAY ROCK & RECYCLING, BLACK RIVER, G MERLINO | Pass | Local |
| 2025-04-23 | HM PACIFIC NORTHWEST - WOODINVILLE RCM | Pass | Local |
| 2025-03-11 | FRANZ SEATTLE DIVISION - WELLER ST. | Pass | Local |
| 2025-02-06 | DYNO BATTERY INC. | Pass | Local |
| 2025-02-06 | DYNO BATTERY INC. | Pass | Local |
| 2025-02-03 | CEDAR GROVE COMPOST CO | Fail | Local |
| 2025-02-03 | CEDAR GROVE COMPOST CO | Fail | Local |
| 2025-01-22 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | Pass | Local |
| 2025-01-20 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | Pass | Local |
| 2025-01-20 | KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT | Pass | Local |
| 2025-01-07 | CPM DEVELOPMENT CORPORATION (DBA ICON MATERIALS) #2604 | Pass | Local |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.