Site

State

PM AQI* (ug/m3)

Dillon

MT

17

Broadus

MT

17

Bozeman High School

MT

13

Butte Greely School

MT

12

Billlings Lockwood

MT

10

Birney

MT

10

French Town - Beckwith

MT

9

Hamilton PS 46

MT

9

Yellowstone- Old Faithful S...

WY

8

Grangeville

ID

8