Site

State

PM AQI* (ug/m3)

Seeley Elementary School

MT

21

Lewiston

ID

15

Libby Courthouse

MT

14

Beulah North

ND

12

Fargo NW

ND

11

French Town - Beckwith

MT

11

Butte Greely School

MT

10

Pinehurst

ID

10

Hamilton PS 46

MT

9

St. Maries

ID

9