Site

State

PM AQI* (ug/m3)

Lancaster DW

PA

24

Indpls-W.18th St

IN

23

Padonia

MD

21

Clinton, Chancy Park

IA

21

South Bend-Shields Dr

IN

20

Indpls-Washington Park

IN

20

Liberty (SAHS)

PA

19

Indpls - I-70 E

IN

18

Marcus Hook

PA

18

Elkhart-Prairie St.

IN

18