What does toxic mold look like in a house?

Toxic mold in a house often appears as patches or spots that can be black, green, gray, or dark brown. It may have a slimy or fuzzy texture and tends to grow in damp or humid areas such as bathrooms, basements, ceilings, or around leaking pipes. Black mold, one of the most common toxic types, usually forms irregular patterns on walls, drywall, or wood surfaces. A strong, musty odor often accompanies its presence. In some cases, toxic mold can grow behind walls or under flooring, making professional inspection necessary to confirm hidden contamination.