Site

State

PM AQI* (ug/m3)

John Day Dayton St

OR

6

Maple Falls-Azure Way

WA

5

La Pine Rural Fire Dept

OR

5

Colbert-Greenbluff

WA

5

Seattle-South Park

WA

5

Darrington-Fir St

WA

4

Marysville-7th Ave

WA

4

Burns - Washington St.

OR

4

Hillsboro - Hare Field

OR

4

Port Angeles-E 5th St

WA

4