Site

State

PM AQI* (ug/m3)

DECATUR

IL

40

Forest Park

MO

39

BLAIR STREET

MO

39

Branch Street

IL

37

NORTHBRK

IL

36

BROADWAY (South)

IL

35

Ogden Dunes

IN

35

NORMAL

IL

35

GC_MAD

IL

35

Hammond-167th St

IN

34