Site

State

PM AQI* (ug/m3)

Seattle-South Park

WA

6

Eugene - Wilkes Dr.

OR

6

Colbert-Greenbluff

WA

6

Cottage Grove City Shops

OR

6

Colville-E 1st St

WA

6

Portland Near Road

OR

6

Spokane-Augusta Ave

WA

6

Springfield City Hall

OR

6

Eugene - Amazon Park

OR

5

Omak-Colville Tribe

WA

5