Site

State

PM AQI* (ug/m3)

Chamizal C41

TX

29

North Valley

NM

27

El Paso UTEP C12

TX

22

Thirty Third

AZ

21

South Valley

NM

19

Ascarate Park Southeast C37

TX

18

West Phoenix

AZ

16

Durango Complex

AZ

15

Nogales Post Office

AZ

15

Jefferson

NM

14