Site

State

PM AQI* (ug/m3)

Laredo C313

TX

25

Mission C43

TX

18

RIVER_Terrace

DC

15

Brownsville C80

TM

14

South DeKalb

GA

14

San Antonio Old Hwy90 C677

TX

14

DCNearRoad

DC

14

St. Marks Wildlife Refuge

FL

14

San Antonio Northwest C23

TX

14

McMillan Reservoir

DC

13