Site

State

PM AQI* (ug/m3)

Greenville-ESC

SC

23

Denver

CO

22

MONTG

AL

22

Odessa Gonzales C1014

TX

21

Portola

CA

19

Spanish Springs

NV

18

Padonia

MD

18

Shuttlesworth

AL

17

Hobbs Jefferson

NM

16

Sparks

NV

16