Site

State

PM AQI* (ug/m3)

Sandpoint U of I

ID

42

Seeley Elementary School

MT

38

Lewiston

ID

37

Pinehurst

ID

31

Nursery Rd.

ID

30

Columbia Falls

MT

26

Lapwai

ID

25

Libby Courthouse

MT

22

St. Maries

ID

19

Thompson Falls HS

MT

19