Site

State

PM AQI* (ug/m3)

Seeley Elementary School

MT

48

Libby Courthouse

MT

26

Lewiston

ID

22

Pinehurst

ID

20

Rossiter Pump House

MT

17

Kamiah

ID

14

St. Maries

ID

13

French Town - Beckwith

MT

11

Columbia Falls

MT

11

Williston

ND

11