Site

State

PM AQI* (ug/m3)

Marshall

MN

24

Greenfield

MA

15

Johnstown

PA

15

Danbury

CT

14

Worcester

MA

13

Fort Lee Near Road

NJ

13

Near Road

RI

13

Waterbury

CT

13

E Providence

RI

13

New Haven - Criscuolo Park

CT

12