Site

State

PM AQI* (ug/m3)

Yakima-4th Ave

WA

24

Toppenish-Yakama Tribe

WA

23

Twisp-Glover St

WA

19

Wenatchee-Fifth St

WA

18

Sunnyside-S 16th

WA

16

Leavenworth-Evans St

WA

15

Quincy 3rd

WA

15

Chelan-Woodin Ave

WA

15

Darrington-Fir St

WA

15

Ellensburg-Ruby St

WA

14