Site

State

PM AQI* (ug/m3)

Carlisle

PA

28

Liberty (SAHS)

PA

27

Portola

CA

25

Lebanon

PA

24

Clemmons Middle

NC

24

BROADWAY (South)

IL

23

State College

PA

23

Elizabeth Trailer

NJ

22

Harrisburg

PA

20

Arendtsville

PA

19