Site

State

PM AQI* (ug/m3)

Yosemite Village - Visitor ...

CA

41

Portola

CA

38

Lancaster DW

PA

35

Mammoth Lakes

CA

34

DESPLNS

IL

30

Fresno - Garland

CA

29

John Day Dayton St

OR

29

Harrisburg

PA

28

Stockton - Hazelton Street

CA

28

York

PA

28