Site

State

PM AQI* (ug/m3)

Broadus

MT

9

Porthill

BC

5

Bismarck Residential

ND

5

Juliaetta E-sampler

ID

5

Moscow

ID

4

Rossiter Pump House

MT

4

Potlatch

ID

4

Mt Hall

ID

4

Cottonwood E-sampler

ID

4

Libby Courthouse

MT

3