Site

State

PM AQI* (ug/m3)

Watertown

SD

10

Rangely, CO

CO

8

Cedar Bluff

KS

8

UC1

SD

8

Research Farm

SD

7

KNI-Topeka

KS

7

SF-USD

SD

7

Heritage Park

KS

7

Paonia

CO

7

2912 Coffey

NE

7