Mold Species Library
Common Indoor Mold Species
Clear, physician-reviewed profiles of the mold genera most often found in damp and water-damaged buildings — what each looks like, where it grows, its health context, and how to handle it safely. Whatever the species, the response starts the same way: find the water and fix it.
Stachybotrys chartarum (“Black Mold”)
What Stachybotrys chartarum — the mold often called “toxic black mold” — actually is, where it grows, its health context, and how to handle it safely.
Read profileAspergillus
A profile of Aspergillus — an extremely common indoor and outdoor mold genus, its role in allergies and infections, and why moisture control matters.
Read profilePenicillium
A profile of Penicillium — a blue-green household mold common on water-damaged materials and food, its allergy role, and how to control it.
Read profileCladosporium
A profile of Cladosporium — one of the most common molds worldwide, its indoor niches on cool damp surfaces, and its allergy relevance.
Read profileAlternaria
A profile of Alternaria — a widespread outdoor and indoor mold strongly linked to allergies and asthma, and where it grows in damp homes.
Read profileChaetomium
A profile of Chaetomium — a mold tied to serious, sustained water damage, its musty odor, and why its presence signals a real moisture problem.
Read profileFusarium
A profile of Fusarium — a mold of wet materials and plants that can cause infections and produce important mycotoxins.
Read profileAureobasidium
A profile of Aureobasidium — a common mold on damp window frames, caulk and painted surfaces, and a frequent skin and respiratory allergen.
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