Site

State

PM AQI* (ug/m3)

Prineville - Davidson Park

OR

35

Madras - Westside School

OR

22

Maple Falls-Azure Way

WA

22

Sweet Home - Fire Department

OR

15

Yakima-4th Ave

WA

15

John Day Dayton St

OR

13

Sunnyside-S 16th

WA

12

Marysville-7th Ave

WA

12

Oakridge - Willamette Activ...

OR

11

Tacoma-L St

WA

11