Site

State

PM AQI* (ug/m3)

Broadus

MT

28

Billlings Lockwood

MT

13

Birney

MT

11

Bozeman High School

MT

9

Butte Greely School

MT

8

Fargo NW

ND

7

Sandpoint U of I

ID

7

Seeley Elementary School

MT

6

French Town - Beckwith

MT

6

Libby Courthouse

MT

6