Site

State

PM AQI* (ug/m3)

Hidden Valley

AZ

19

Anthony

NM

18

El Paso UTEP C12

TX

16

Ascarate Park Southeast C37

TX

14

Yuma Supersite

AZ

13

Alamo Lake

AZ

13

Santa Teresa

NM

12

Socorro Hueco C49

TX

10

Mesa - Brooks Reservoir

AZ

10

Casa Grande Downtown

AZ

9