Site

State

PM AQI* (ug/m3)

Sunnyside-S 16th

WA

21

Maple Falls-Azure Way

WA

20

Mobile-Yakima

WA

17

John Day Dayton St

OR

16

Colville-E 1st St

WA

16

Yakima-4th Ave

WA

13

Hood River West Side FD

OR

13

Roseburg Fire Dept

OR

13

Port Angeles-E 5th St

WA

12

Walla Walla-12th St

WA

12