Site

State

PM AQI* (ug/m3)

Houston North Wayside C405

TX

25

Shreveport Airport

LA

24

Texarkana New Boston

TX

24

Fort Worth CA Parkway N C1053

TX

23

Karnack C85

TX

23

Ft. Worth Northwest C13

TX

23

Lafayette

LA

23

Miami

OK

23

Houston North Loop C1052

TX

22

McAlester

OK

22