Site

State

PM AQI* (ug/m3)

Sheridan PD

WY

12

Pinedale Gaseous

WY

11

Heritage Park

KS

11

Lander SLAMS

WY

11

Rangely, CO

CO

9

Credit Union

SD

9

WY/KC

KS

9

Greeley Hospital

CO

8

2912 Coffey

NE

8

Watertown

SD

8