Site

State

PM AQI* (ug/m3)

Springville

CA

24

Mission Viejo

CA

22

Riverton Mobile

WY

22

Reseda

CA

21

Sapello-1033 NM-518

NM

20

North Holywood

CA

20

Portola

CA

20

Otay Mesa - Donovan

CA

20

Yuma Supersite

AZ

19

Los Angeles - N. Main Street

CA

19