Site

State

PM AQI* (ug/m3)

Nogales Post Office

AZ

13

Chamizal C41

TX

10

Ascarate Park Southeast C37

TX

10

Geronimo

AZ

9

West Phoenix

AZ

9

South Phoenix

AZ

9

Eagle Pass C319

TX

9

North Valley

NM

8

Durango Complex

AZ

8

Glendale Community College

AZ

8