Site

State

PM AQI* (ug/m3)

Yuma Supersite

AZ

20

Hidden Valley

AZ

10

South Phoenix

AZ

10

Geronimo

AZ

9

North Phoenix

AZ

9

Ascarate Park Southeast C37

TX

8

Casa Grande Downtown

AZ

8

Chamizal C41

TX

8

Eastwood

AZ

7

Children's Park Site

AZ

7