Site

State

PM AQI* (ug/m3)

Hidden Valley

AZ

20

Ascarate Park Southeast C37

TX

12

Chamizal C41

TX

10

Yuma Supersite

AZ

10

Odessa Gonzales C1014

TX

10

Eagle Pass C319

TX

9

El Paso UTEP C12

TX

9

Nogales Post Office

AZ

9

Hobbs Jefferson

NM

8

Santa Teresa

NM

8