Site

State

PM AQI* (ug/m3)

Oak Harbor-SW 6th (US)

WA

27

Moses Lake-Balsam St

WA

24

Cave Junction Forest Service

OR

20

Burns - Washington St.

OR

16

Oakridge - Willamette Activ...

OR

15

Omak-Colville Tribe

WA

14

Portland - SE Lafayette

OR

14

Portland Near Road

OR

13

Colville-E 1st St

WA

13

Sunnyside-S 16th

WA

13