Site
State
PM AQI* (ug/m3)
MONTG
AL
24
Greenville-ESC
SC
23
Eagle Pass C319
TX
21
Denver
CO
20
San Antonio Old Hwy90 C677
19
Laredo C313
18
Liberty (SAHS)
PA
17
Fort Lee Near Road
NJ
Odessa Gonzales C1014
Cornwall
CT