Site

State

PM AQI* (ug/m3)

Omak-Colville Tribe

WA

17

Burns - Washington St.

OR

13

Colville-E 1st St

WA

13

John Day Dayton St

OR

11

Twisp-Glover St

WA

10

Baker City - Forest Service

OR

10

Darrington-Fir St

WA

9

Maple Falls-Azure Way

WA

9

Shelton-W Franklin

WA

8

Yakima-4th Ave

WA

7