Site

State

PM AQI* (ug/m3)

Carlisle

PA

27

Mission C43

TX

26

DETROIT-SW

MI

26

Lancaster DW

PA

26

Portola

CA

25

Houston North Wayside C405

TX

25

Harrisburg

PA

25

Houston North Loop C1052

TX

25

Houston East C1

TX

24

Clinton, Chancy Park

IA

24