Composition

• Household dust is made of dirt, pollen, human skin and hair follicles, pet dander, pollen, sand, insect husks and pollutants.
  
  

Origins

• Depending on where you live, your environmental conditions, air quality and the windows and ventilation system in your house, dust can come from you, your family members, pets, and your interaction with the outdoors.
  
  

Outside Influences

• If you are living in an urban area, you will notice (especially around your windows) a gritty black film that settles on furniture. This dust is mostly made of pollutants from the outside. If you live in dry, less populated areas, the exterior dust will commonly be made of plant pollen.
  
  

Pets

• Some pets create more dander than others, especially some breeds of large dogs and cats.
  
  

Dust Trouble Spots

• Dust collects in areas around windows, in vents and heating ducts, in fans and on electronics prone to static electricity (such as the television).
  
  

Dust and Grease

• In the kitchen, dust may combine with grease to create a difficult (if not impossible) to remove film, which often collects on tops of cabinets and refrigerators, and on rarely used items.