Site

State

PM AQI* (ug/m3)

WY/KC

KS

13

Longmont

CO

12

UC1

SD

12

Watertown

SD

11

Denver - NJH - 14th Ave. & ...

CO

11

2912 Coffey

NE

11

Sioux Falls

SD

11

Heritage Park

KS

10

I25 Denver

CO

10

Aberdeen

SD

10