Site | State | PM AQI* (ug/m3) |
Sunnyside-S 16th | WA | 7 |
Clarkston-13th St | WA | 7 |
Winthrop-Chewuch Rd | WA | 7 |
Seattle-South Park | WA | 6 |
Spokane-E Broadway Ave (US) | WA | 6 |
Colbert-Greenbluff | WA | 6 |
Twisp-Glover St | WA | 6 |
Omak-Colville Tribe | WA | 6 |
Wenatchee-Fifth St | WA | 6 |
Portland Near Road | OR | 6 |