Site

State

AQI*

Lake George-Lake George RS ...

CO

31

2912 Coffey

NE

14

UC1

SD

12

Watertown

SD

11

KNI-Topeka

KS

10

Research Farm

SD

10

Pierre

SD

9

Sioux Falls

SD

9

NCORE

NE

8

Cedar Bluff

KS

8