Common Types of Household Mold & Their Risk

Mold Type Appearance Common Locations Health Concerns
Aspergillus Black, green, or yellow colonies HVAC systems, insulation, damp walls, basements Asthma flare-ups, allergic reactions, lung infections; some species produce mycotoxins
Cladosporium Black, brown, or olive-green, suede-like Bathrooms, fabrics, HVAC ducts, carpets, wood Allergic symptoms (sneezing, itchy eyes, runny nose), asthma attacks; rarely skin or eye infections
Penicillium Blue, green, or white, velvety Water-damaged wallpaper, insulation, mattresses, carpet Allergies, asthma, sinus infections; some species produce harmful mycotoxins
Stachybotrys (Black Mold) Slimy, dark green to black patches Water-damaged drywall, ceilings, cardboard, wood, paper Chronic coughing, fatigue, headaches, skin irritation; possible neurological effects from mycotoxins
Alternaria Dark green or brown, fuzzy Showers, window frames, sinks, damp basements Asthma and allergy trigger; may cause skin rashes and eye infections
Chaetomium White at first, then gray, brown, or black; cotton-like Wet drywall, wallpaper, wood, carpet padding Skin and nail infections; some strains produce immune-suppressing mycotoxins
Fusarium Pink, white, or reddish Wet carpets, wallpaper, fabrics, HVAC systems Allergic reactions, respiratory irritation, eye or skin infections; some species produce toxins affecting nervous system and liver
types of mold ulocladium 1
types of mold trichoderma 1
types of mold stachybotrys 1
types of mold penicillium 1
types of mold fusarium 1
types of mold mucor 1 1
types of mold cladosporium 1
types of mold chaetomium 1
types of mold aureobasidium 1
types of mold aspergillus 1
types of mold alternaria 1
types of mold acremonium 1
Scroll to Top