Site

State

PM AQI* (ug/m3)

Sandpoint U of I

ID

12

Fargo NW

ND

12

Broadus

MT

11

St. Maries

ID

10

Libby Courthouse

MT

10

Lewiston

ID

10

Birney

MT

9

Missoula Boyd Park

MT

9

Seeley Elementary School

MT

9

Butte Greely School

MT

8