It’s likely not the black mold you are thinking about and is probably not dangerous at all. Concrete is only semi-porous and would need a ton of water over an extended period of time under the right humid conditions for black mold to grow on it. One of the biggest myths about mold is that just because it is black in color, it is “black mold”. read more
The Truth About Toxic Black Mold: It’s Probably Not What You Think Mold: Just One Component Impacting Indoor Air Quality Moldman has locations in Chicago, St. Louis and Kansas City. read more
So, black mold includes: The mycelium is white, but spores usually have black color. This strain lives on various surfaces inside the house. This kind can cause such a dangerous disease as aspergillosis. Phoma - fungi of the fourth pathogenicity group. Spores of this strain are mostly white, but the mycelium are black. This mold is almost always black. read more