Site

State

PM AQI* (ug/m3)

Princess Anne

MD

12

Pocomoke City

MD

12

East St. Louis

IL

11

Leech Lake Nation: Cass Lake

MN

11

Newburgh

NY

11

Worcester

MA

10

Near Road

RI

9

Elizabeth Trailer

NJ

8

Detroit Lakes

MN

8

Hagerstown

MD

8