Site

State

PM AQI* (ug/m3)

Maple Falls-Azure Way

WA

33

Portola

CA

32

John Day Dayton St

OR

30

Bonifay

FL

28

Steubenville

OH

26

Lancaster DW

PA

24

Allentown

PA

24

Glennville-4127 Banks Durre...

GA

23

Liberty (SAHS)

PA

22

Beaver Falls

PA

22