Site

State

PM AQI* (ug/m3)

Nogales Post Office

AZ

20

Ascarate Park Southeast C37

TX

18

West Phoenix

AZ

15

Phoenix JLG Supersite

AZ

12

Durango Complex

AZ

11

Hidden Valley

AZ

11

Chamizal C41

TX

11

Hobbs Jefferson

NM

10

Yuma Supersite

AZ

9

Taos Fire Station

NM

9