Site

State

PM AQI* (ug/m3)

St. Maries

ID

22

Grangeville

ID

22

Boundary County

ID

16

Sandpoint U of I

ID

13

Libby Courthouse

MT

13

Pinehurst

ID

11

Columbia Falls

MT

10

Cut Bank

MT

9

Cottonwood E-sampler

ID

9

Lancaster

ID

8