Site

State

NowCast

West Phoenix

AZ

58

South Phoenix

AZ

56

Salmon PM2.5

ID

33

Durango Complex

AZ

32

Phoenix JLG Supersite

AZ

30

Chamizal C41

TX

28

Steubenville

OH

24

North Phoenix

AZ

23

Maple Falls-Azure Way

WA

22

Cincinnati Near Road

OH

22