Site

State

PM AQI* (ug/m3)

Seeley Elementary School

MT

29

Beulah North

ND

19

Libby Courthouse

MT

17

Lewiston

ID

14

Fargo NW

ND

13

Hannover

ND

11

Pinehurst

ID

11

Bismarck Residential

ND

11

Columbia Falls

MT

10

Sandpoint U of I

ID

9