Site

State

PM AQI* (ug/m3)

Aberdeen

SD

33

Watertown

SD

30

Research Farm

SD

28

Pinedale Gaseous

WY

17

Riverton Mobile

WY

17

Lander SLAMS

WY

16

UC1

SD

16

Longmont

CO

15

Gillette SLAMS

WY

15

Globeville

CO

14