Site

State

PM AQI* (ug/m3)

Beulah North

ND

13

St. Maries

ID

13

Libby Courthouse

MT

12

Cut Bank

MT

9

Pinehurst

ID

9

Seeley Elementary School

MT

8

Bismarck Residential

ND

7

Rossiter Pump House

MT

7

Hannover

ND

7

Sandpoint U of I

ID

7

Lewiston

ID

7