Site

State

PM AQI* (ug/m3)

Darrington-Fir St

WA

37

Maple Falls-Azure Way

WA

25

Marysville-7th Ave

WA

24

Tacoma-L St

WA

21

John Day Dayton St

OR

21

Lake Forest Park-Town Center

WA

17

Burns - Washington St.

OR

16

Kent-James & Central

WA

15

Oakridge - Willamette Activ...

OR

14

Leavenworth-Evans St

WA

14