Site

State

PM AQI* (ug/m3)

Maple Falls-Azure Way

WA

10

John Day Dayton St

OR

10

Omak-Colville Tribe

WA

5

Brewster Mobile

WA

5

Airway Heights-West 12th (US)

WA

4

Burns - Washington St.

OR

4

Seattle-South Park

WA

4

Baker City - Forest Service

OR

4

Cave Junction Forest Service

OR

4

Sunnyside-S 16th

WA

4