Site

State

PM AQI* (ug/m3)

Hurst Road

AK

90

A Street

AK

46

Portola

CA

40

Maple Falls-Azure Way

WA

36

Salmon PM2.5

ID

33

West Phoenix

AZ

30

Porterville-NFS

CA

28

Libby Courthouse

MT

27

NCore

AK

27

Seeley Elementary School

MT

26