Site

State

PM AQI* (ug/m3)

Ponca City

OK

18

Isla Blanca C323/C667

TX

18

Springville

CA

17

Laredo C313

TX

17

SPRNGDLE

AR

17

Von Ormy Highway 16

TX

17

St Theodosius

OH

17

San Antonio Old Hwy90 C677

TX

16

Odessa Gonzales C1014

TX

16

Houston North Loop C1052

TX

16