Site

State

PM AQI* (ug/m3)

Omak-Colville Tribe

WA

12

Maple Falls-Azure Way

WA

11

John Day Dayton St

OR

11

Ellensburg-Ruby St

WA

7

Burns - Washington St.

OR

7

Colville-E 1st St

WA

7

Port Angeles-E 5th St

WA

7

Medford Welch & Jackson

OR

6

Newport-Calispel

WA

6

Ashland Fire Dept

OR

6