Site	State	PM AQI* (ug/m3)
Omak-Colville Tribe	WA	29
John Day Dayton St	OR	25
Klamath Falls - Peterson Sc...	OR	23
Yakima-4th Ave	WA	23
Winthrop-Chewuch Rd	WA	20
Toppenish-Yakama Tribe	WA	18
Cottage Grove City Shops	OR	18
Burns - Washington St.	OR	18
Clarkston-13th St	WA	17
Sunnyside-S 16th	WA	17