Site

State

PM AQI* (ug/m3)

John Day Dayton St

OR

9

Maple Falls-Azure Way

WA

6

Seattle-South Park

WA

4

Omak-Colville Tribe

WA

4

Baker City - Forest Service

OR

4

Darrington-Fir St

WA

4

Colbert-Greenbluff

WA

4

Anacortes-202 Ave (SO-AQS)

WA

3

Portland SE 12th and Salmon

OR

3

Port Angeles-E 5th St

WA

3