What type of mold is the worst?

Black Mold (_Stachybotrys chartarum_)

Black mold is considered one of the worst types of mold because it can produce mycotoxins, which are toxic substances that can cause various health problems, including respiratory issues, skin irritation, and even neurological problems. Black mold is also known to be more difficult to remove compared to other types of mold, and it can spread quickly, making it a significant concern for property owners.