Site

State

PM AQI* (ug/m3)

Burns - Washington St.

OR

19

Cashmere Mobile

WA

15

Brewster Mobile

WA

12

Omak-Colville Tribe

WA

12

Maple Falls-Azure Way

WA

11

Moses Lake-Balsam St

WA

10

Hermiston - Municipal Airport

OR

10

John Day Dayton St

OR

10

Winthrop-Chewuch Rd

WA

10

Twisp-Ewell St

WA

9