Site

State

PM AQI* (ug/m3)

Portola

CA

41

Darrington-Fir St

WA

28

St. Maries

ID

28

Lake George-Lake George RS ...

CO

26

Marysville-7th Ave

WA

22

Libby Courthouse

MT

22

Lake Forest Park-Town Center

WA

20

BASKETT

KY

18

KNI-Topeka

KS

18

Portland - SE Lafayette

OR

17