Site

State

PM AQI* (ug/m3)

Laredo C313

TX

34

Portola

CA

26

San Antonio Old Hwy90 C677

TX

21

Clemmons Middle

NC

20

Rome

GA

20

San Antonio Northwest C23

TX

20

Parkway East (Near Road)

PA

20

Gainesville

GA

19

Mission C43

TX

19

Confederate Ave

GA

19