Site

State

PM AQI* (ug/m3)

Laredo C313

TX

18

San Antonio Old Hwy90 C677

TX

17

Near Road OKC

OK

17

Fort Worth CA Parkway N C1053

TX

17

Denton Airport South C56

TX

17

Austin North Interstate 35 ...

TX

16

Karnack C85

TX

16

Von Ormy Highway 16

TX

16

DCNearRoad

DC

16

Ponca City

OK

15