Site

State

PM AQI* (ug/m3)

Hidden Valley

AZ

32

Ascarate Park Southeast C37

TX

25

South Valley

NM

25

Chamizal C41

TX

24

Amarillo Texas A&M C320

TX

22

North Valley

NM

20

Socorro Hueco C49

TX

19

El Paso UTEP C12

TX

18

Jefferson

NM

18

Durango Complex

AZ

17