Site

State

PM AQI* (ug/m3)

Burns - Washington St.

OR

27

Oakridge - Willamette Activ...

OR

18

Colville-E 1st St

WA

17

John Day Dayton St

OR

17

Yakima-4th Ave

WA

15

Klamath Falls - Peterson Sc...

OR

15

Medford Welch & Jackson

OR

14

Baker City - Forest Service

OR

14

Prineville - Davidson Park

OR

13

Twisp-Glover St

WA

12