Site

State

PM AQI* (ug/m3)

Libby Courthouse

MT

13

Seeley Elementary School

MT

9

Thompson Falls HS

MT

8

Juliaetta E-sampler

ID

8

TRNP-NU

ND

7

Billlings Lockwood

MT

6

Sidney 201

MT

6

Fargo NW

ND

6

Bismarck Residential

ND

6

RYDER

ND

6