Site

State

PM AQI* (ug/m3)

Broadus

MT

11

Billlings Lockwood

MT

10

Fargo NW

ND

10

Bozeman High School

MT

9

Lewiston

ID

8

French Town - Beckwith

MT

8

Birney

MT

7

Rossiter Pump House

MT

7

Grangeville

ID

7

Seeley Elementary School

MT

7