Site

State

PM AQI* (ug/m3)

Libby Courthouse

MT

26

Seeley Elementary School

MT

26

Beulah North

ND

23

Cut Bank

MT

22

Lewiston

ID

22

Lostwood NWR

ND

22

Pinehurst

ID

22

Bismarck Residential

ND

21

Lake Ilo

ND

21

RYDER

ND

20