Site

State

PM AQI* (ug/m3)

Thompson Falls HS

MT

10

Lostwood NWR

ND

7

Bismarck Residential

ND

7

Fargo NW

ND

7

Plummer CDA Tribe

ID

7

RYDER

ND

6

Hannover

ND

6

Beulah North

ND

5

Porthill

BC

5

Broadus

MT

4