Site

State

AQI*

DETROIT - W LAFAYETTE

MI

31

Chester

PA

25

Liberty (SAHS)

PA

24

Parkway East (Near Road)

PA

24

Lawrenceville

PA

23

Steubenville

OH

23

Lancaster DW

PA

22

Johnstown

PA

22

Carlisle

PA

21

Lancaster

PA

20