Site

State

PM AQI* (ug/m3)

John Day Dayton St

OR

10

Maple Falls-Azure Way

WA

10

Twisp-Glover St

WA

9

Salem - State Hospital

OR

8

Toppenish-Yakama Tribe

WA

7

Yakima-4th Ave

WA

7

Sunnyside-S 16th

WA

7

Seattle-10th & Weller

WA

7

Seattle-South Park

WA

6

Burns - Washington St.

OR

6