Site

State

PM AQI* (ug/m3)

Ascarate Park Southeast C37

TX

23

Anthony

NM

10

Socorro Hueco C49

TX

10

Hidden Valley

AZ

10

Geronimo

AZ

9

Nogales Post Office

AZ

9

Yuma Supersite

AZ

9

Thirty Third

AZ

9

Odessa Gonzales C1014

TX

8

South Phoenix

AZ

7