Site

State

PM AQI* (ug/m3)

2912 Coffey

NE

9

Sioux Falls

SD

9

KNI-Topeka

KS

9

Aberdeen

SD

8

WY/KC

KS

8

UC1

SD

8

Watertown

SD

7

Rangely, CO

CO

6

NCORE

NE

6

Research Farm

SD

6