Site

State

PM AQI* (ug/m3)

Colville-E 1st St

WA

6

Omak-Colville Tribe

WA

6

Seattle-South Park

WA

5

Eugene - Wilkes Dr.

OR

5

Colbert-Greenbluff

WA

4

Springfield City Hall

OR

4

Clarkston-13th St

WA

4

Cottage Grove City Shops

OR

4

Baker City - Forest Service

OR

4

Seattle-10th & Weller

WA

4