Site

State

PM AQI* (ug/m3)

Cut Bank

MT

13

Libby Courthouse

MT

11

Hannover

ND

10

TRNP-NU

ND

10

Lake Ilo

ND

10

Bismarck Residential

ND

9

Sidney 201

MT

9

LaGrande Cannon

MT

8

Malta

MT

8

Bozeman High School

MT

7