Site

State

PM AQI* (ug/m3)

San Antonio Old Hwy90 C677

TX

28

Von Ormy Highway 16

TX

23

Laredo C313

TX

22

San Antonio Northwest C23

TX

22

Mission C43

TX

21

Millbrook NCore

NC

21

San Antonio IH35 C1069

TX

20

SPA-Irving St.

SC

19

Austin North Interstate 35 ...

TX

19

Burdens Creek

NC

19