Site

State

PM AQI* (ug/m3)

Colville-E 1st St

WA

14

Roseburg Fire Dept

OR

14

Omak-Colville Tribe

WA

12

Newport-Calispel

WA

10

John Day Dayton St

OR

10

Roseburg - Garden Valley Blvd.

OR

9

Grants Pass - Parkside School

OR

8

Brewster Mobile

WA

8

Twisp-Ewell St

WA

8

Winthrop-Chewuch Rd

WA

8