Site

State

PM AQI* (ug/m3)

Cave Junction Forest Service

OR

28

Yakima-4th Ave

WA

18

Maple Falls-Azure Way

WA

18

Ellensburg-Ruby St

WA

18

Klamath Falls - Peterson Sc...

OR

18

Darrington-Fir St

WA

16

Baker City - Forest Service

OR

16

Grants Pass - Parkside School

OR

16

Toppenish-Yakama Tribe

WA

16

Omak-Colville Tribe

WA

14