Site

State

PM AQI* (ug/m3)

Seeley Elementary School

MT

29

Libby Courthouse

MT

21

Pinehurst

ID

18

St. Maries

ID

17

Columbia Falls

MT

14

Rossiter Pump House

MT

14

Nursery Rd.

ID

13

Lewiston

ID

13

Kamiah

ID

10

Butte Greely School

MT

9