Site

State

PM AQI* (ug/m3)

Gillette SLAMS

WY

38

Credit Union

SD

35

Pinedale Gaseous

WY

30

Kemmerer Mobile

WY

26

WIND CAVE

SD

24

Longmont

CO

24

Lander SLAMS

WY

23

Rock Springs SLAMS

WY

22

South Pass

WY

21

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

CO

21