Site

State

PM AQI* (ug/m3)

Hidden Valley

AZ

26

Ascarate Park Southeast C37

TX

19

Chamizal C41

TX

18

El Paso UTEP C12

TX

13

Durango Complex

AZ

13

Socorro Hueco C49

TX

12

Nogales Post Office

AZ

11

South Valley

NM

11

South Phoenix

AZ

10

West Phoenix

AZ

10