Site

State

PM AQI* (ug/m3)

Indpls-W.18th St

IN

26

Liberty (SAHS)

PA

21

Lancaster DW

PA

20

Johnstown

PA

17

Indpls - I-70 E

IN

16

East HS

OH

16

Blue Ridge I-70

MO

15

GC_MAD

IL

15

Waterloo, Water Tower

IA

14

Forest Park

MO

14