Site

State

PM AQI* (ug/m3)

Yellowstone- Old Faithful S...

WY

30

Birney

MT

29

Malta

MT

28

Broadus

MT

26

Lewiston

ID

24

Kamiah

ID

23

Seeley Elementary School

MT

23

Bozeman High School

MT

23

Grangeville

ID

23

Nezperce

ID

22