Site

State

PM AQI* (ug/m3)

Denver

CO

227

2912 Coffey

NE

11

NCORE

NE

11

Heritage Park

KS

11

Watertown

SD

10

KNI-Topeka

KS

9

Greeley Hospital

CO

8

Sioux Falls

SD

7

Research Farm

SD

7

Adams

CO

7