Site

State

PM AQI* (ug/m3)

Nogales Post Office

AZ

16

Las Cruces ED

NM

15

Hidden Valley

AZ

14

El Paso UTEP C12

TX

13

Santa Fe-705 Alta Vista St

NM

12

Yuma Supersite

AZ

12

Ascarate Park Southeast C37

TX

12

Casa Grande Downtown

AZ

11

Durango Complex

AZ

11

Socorro Hueco C49

TX

10