Site

State

PM AQI* (ug/m3)

Libby Courthouse

MT

23

Seeley Elementary School

MT

16

Pinehurst

ID

16

St. Maries

ID

14

Columbia Falls

MT

12

French Town - Beckwith

MT

12

Pioneer Park

MT

10

Plummer CDA Tribe

ID

9

Butte Greely School

MT

9

Kamiah

ID

9