Site

State

PM AQI* (ug/m3)

Fargo NW

ND

21

Billlings Lockwood

MT

13

Hannover

ND

13

Butte Greely School

MT

12

RYDER

ND

12

Libby Courthouse

MT

11

Beulah North

ND

11

Bozeman High School

MT

10

French Town - Beckwith

MT

10

Lostwood NWR

ND

10