Site

State

PM AQI* (ug/m3)

Broadus

MT

21

Birney

MT

16

Bozeman High School

MT

9

Billlings Lockwood

MT

9

Fargo NW

ND

7

Malta

MT

7

French Town - Beckwith

MT

6

Butte Greely School

MT

6

Grangeville

ID

5

Hamilton PS 46

MT

5