Site
State
PM AQI* (ug/m3)
Ascarate Park Southeast C37
TX
17
Yuma Supersite
AZ
16
El Paso UTEP C12
13
Hobbs Jefferson
NM
12
Durango Complex
11
Phoenix JLG Supersite
10
Hidden Valley
Socorro Hueco C49
9
Chamizal C41
Diablo