Site

State

PM AQI* (ug/m3)

Ascarate Park Southeast C37

TX

27

Portola

CA

27

Potosi

WI

22

Yosemite National Park-7741...

CA

20

Socorro Hueco C49

TX

18

Santa Clarita

CA

17

Laredo C313

TX

14

Visalia - N. Church Street

CA

14

St. Maries

ID

14

Mission C43

TX

14