Site

State

PM AQI* (ug/m3)

Steubenville

OH

17

Liberty (SAHS)

PA

15

Leech Lake Nation: Cass Lake

MN

14

Worcester

MA

14

Newark Firehouse

NJ

13

Utica

NY

13

Buffalo Near-road

NY

13

Boston-Von Hillern

MA

13

Indpls-W.18th St

IN

13

Brockton

MA

12