Site

State

PM AQI* (ug/m3)

Darrington-Fir St

WA

21

Marysville-7th Ave

WA

21

Colville-E 1st St

WA

13

Lacey-College St

WA

10

John Day Dayton St

OR

9

Burns - Washington St.

OR

9

Toppenish-Yakama Tribe

WA

9

Port Angeles-E 5th St

WA

9

Twisp-Glover St

WA

9

Baker City - Forest Service

OR

9