Site

State

PM AQI* (ug/m3)

Hidden Valley

AZ

8

Ascarate Park Southeast C37

TX

8

El Paso UTEP C12

TX

7

Yuma Supersite

AZ

7

Amarillo Texas A&M C320

TX

6

Thirty Third

AZ

6

North Phoenix

AZ

5

Durango Complex

AZ

5

Phoenix JLG Supersite

AZ

5

Nogales Post Office

AZ

5