Stachybotrys chartarum and Stachybotrys chlorohalonata, commonly known as "black mold," are two species of fungi. They are associated with poor indoor air quality, and frequently appear after water damage to building materials.
Black mold, sometimes called "toxic black mold," most commonly appears in basements, crawlspaces and other areas of homes exposed to high levels of moisture. The spores of black mold can cause a wide range of allergic reactions and other health problems, including chronic fatigue, chronic headaches, fever and respiratory problems. Though black mold is the most infamous of the fungi that commonly grow in homes and businesses, all molds are potentially hazardous to human health and should be treated with caution.