Site

State

PM AQI* (ug/m3)

Laredo C313

TX

14

Mission C43

TX

13

Brownsville C80

TM

11

Clinton C403

TX

10

San Antonio Old Hwy90 C677

TX

10

DCNearRoad

DC

9

John A. Chesnut Sr. Park

FL

9

Midlothian OFW C52

TX

9

Austin Webberville Road C171

TX

9

Austin North Interstate 35 ...

TX

9