Site

State

PM AQI* (ug/m3)

Omak-Colville Tribe

WA

17

Brewster Mobile

WA

16

Ontario May Roberts Element...

OR

14

Baker City - Forest Service

OR

14

Colville-E 1st St

WA

13

Burns - Washington St.

OR

12

John Day Dayton St

OR

12

Medford Welch & Jackson

OR

11

Maple Falls-Azure Way

WA

11

Enterprise - US Forest Service

OR

10