Site

State

PM AQI* (ug/m3)

Anacortes-Bartholomew Rd (US)

WA

23

Marysville-7th Ave

WA

12

Toppenish-Yakama Tribe

WA

8

Eugene - Highway 99

OR

8

Seattle-South Park

WA

7

Darrington-Fir St

WA

7

Colbert-Greenbluff

WA

7

Colville-E 1st St

WA

7

Omak-Colville Tribe

WA

6

Seattle-Duwamish

WA

6