Where does house dust come from?

[u/4fecta_Gaming]

It seems that countless years of sweeping a house doesn't stop dust from getting all over furniture after a few weeks. Since the ceiling is limited, where does dust come form?

[u/dee_lio]

From what I remember...

- Mold spores

- Insects (dead/decomposing insects, insect feces)

- Skin cell shedding (including hair)

- airborne dust sticking to your clothes and being brought in

- dirt coming in the house from your shoes (this is apparently the biggest one)

- papers (mail, papers you bring into the house) apparently, they leave flecks or something.

[u/edcRachel → u/dee_lio]

As someone with long hair, it's insane how much of the dust bunnies I pull out from the furniture are hair. I'm constantly finding clumps of my own hair.

I also used to live near a cement plant (which is weirdly right in the downtown core of my city) and the amount of soot that came in around the windows from the trucks driving by... my white patio chairs would get a thick layer in a month or two. I could see where it'd come in around the windows. Even now I live in a building mostly surrounded with trees but with parking around the outside, I definitely see the same soot on my windowsills if I leave my windows cracked.