Site

State

PM AQI* (ug/m3)

Seeley Elementary School

MT

27

Libby Courthouse

MT

23

Pinehurst

ID

16

Beulah North

ND

16

Butte Greely School

MT

14

St. Maries

ID

13

French Town - Beckwith

MT

11

Fargo NW

ND

10

Sandpoint U of I

ID

9

Columbia Falls

MT

9