Site | State | PM AQI* (ug/m3) |
Clarkston-13th St | WA | 9 |
Winthrop-Chewuch Rd | WA | 7 |
Enterprise - US Forest Service | OR | 7 |
Seattle-Duwamish | WA | 7 |
Spokane-Augusta Ave | WA | 7 |
Omak-Colville Tribe | WA | 6 |
Twisp-Glover St | WA | 6 |
Lakeview - Center & M | OR | 6 |
Darrington-Fir St | WA | 6 |
Seattle-South Park | WA | 6 |