Site

State

PM AQI* (ug/m3)

Cashmere Mobile

WA

16

Omak-Colville Tribe

WA

15

Leavenworth-Evans St

WA

14

Ontario May Roberts Element...

OR

13

Brewster Mobile

WA

12

Wenatchee-Fifth St

WA

11

Twisp-Ewell St

WA

11

Cle Elum Mobile

WA

10

John Day Dayton St

OR

9

Winthrop-Chewuch Rd

WA

8