Site

State

PM AQI* (ug/m3)

Hidden Valley

AZ

26

Yuma Supersite

AZ

13

Thirty Third

AZ

13

South Valley

NM

13

Nogales Post Office

AZ

12

Geronimo

AZ

12

Ascarate Park Southeast C37

TX

12

North Valley

NM

11

Casa Grande Downtown

AZ

11

Durango Complex

AZ

11