Site

State

PM AQI* (ug/m3)

John Day Dayton St

OR

10

Marysville-7th Ave

WA

6

Omak-Colville Tribe

WA

6

Colville-E 1st St

WA

5

Seattle-South Park

WA

5

Twisp-Glover St

WA

5

Port Angeles-E 5th St

WA

5

Maple Falls-Azure Way

WA

5

Raymond-4th St

WA

5

Cottage Grove City Shops

OR

4