Site

State

PM AQI* (ug/m3)

Plummer CDA Tribe

ID

10

Lewiston

ID

7

RYDER

ND

6

Beulah North

ND

6

Bismarck Residential

ND

5

Sandpoint U of I

ID

5

Porthill

BC

5

Libby Courthouse

MT

5

Lostwood NWR

ND

5

Hannover

ND

5