Site

State

PM AQI* (ug/m3)

Fargo NW

ND

8

Bismarck Residential

ND

7

Billlings Lockwood

MT

6

Beulah North

ND

5

Hannover

ND

5

Lostwood NWR

ND

5

RYDER

ND

5

Lake Ilo

ND

5

TRNP-NU

ND

5

Libby Courthouse

MT

4