5 Types of Common Household Mold

We are all used to household mold. When you leave the leftovers in the fridge just a little too long. When you’re just too busy to wipe down the shower curtain. Maybe that leaky pipe in the kitchen didn’t get fixed right away and you lost track.

Mold spores are everywhere and they only take three things to grow: food, air, and water. Here are the 5 most common types of household mold you might encounter if you provide the right conditions:


A green fungus often found on bread, penicillium is used in making antibiotics. It is also used to make cheese, and leads to bread ending up in landfills everywhere.


This household mold is usually blue and grows on wet textiles and wallpaper, materials which often get damaged in a flood. Mycotoxins from Aspergillus are the culprits most often when people are allergic to mold and have respiratory symptoms like asthma or congestion.


Trichoderma is another green mold that is present in all soil. It’s what’s growing on that plastic container of spaghetti in the back of the refrigerator.


This brown mold can cause infection in humans. If you always shower with soap after working out in a public place like a gym and you will prevent any infections from this fungus.


Another type of household mold which can cause asthma or allergy symptoms, Alternaria is especially dangerous to those with compromised immune systems.

You can’t completely avoid contact with mold of all sorts, but there are things you can do to keep it in check. Fix leaks promptly and replace any porous materials damaged by water. Always run the fan in the bathroom during AND after a shower. Throw those leftovers away before they become a home for a colony. If you see mold, remove it, but remember there may be more that you can’t see. If household mold gets out of hand, call a professional!