Site

State

PM AQI* (ug/m3)

Seeley Elementary School

MT

13

St. Maries

ID

10

Libby Courthouse

MT

10

Fargo NW

ND

10

Rossiter Pump House

MT

9

Broadus

MT

7

Lewiston

ID

7

Great Falls Overlook Park

MT

6

Grangeville

ID

6

Bozeman High School

MT

6