Site

State

PM AQI* (ug/m3)

Hurst Road

AK

80

Liberty (SAHS)

PA

50

Smithfield

UT

50

Lancaster DW

PA

49

Lancaster

PA

47

Chester

PA

45

Seeley Elementary School

MT

44

A Street

AK

43

Nogales Post Office

AZ

43

Salmon PM2.5

ID

41