Site

State

PM AQI* (ug/m3)

South Phoenix

AZ

22

Eagle Pass C319

TX

17

Odessa Gonzales C1014

TX

16

Hobbs Jefferson

NM

13

Sapello-1033 NM-518

NM

13

Chamizal C41

TX

11

Ascarate Park Southeast C37

TX

11

Hidden Valley

AZ

10

Socorro Hueco C49

TX

9

Mesa - Brooks Reservoir

AZ

9