Site

State

PM AQI* (ug/m3)

Sapello-1033 NM-518

NM

20

Yuma Supersite

AZ

19

South Phoenix

AZ

15

Chamizal C41

TX

14

Hidden Valley

AZ

13

Geronimo

AZ

13

South Valley

NM

12

Rose Elementary

AZ

11

Grand Canyon ozone bench

AZ

11

Mesa - Brooks Reservoir

AZ

11