i dont see any reason why you cant, a bit of googling reveals a lot of people use it for plants.
however, wikipidea does say this...

"Drinking the water
Water collected from any dehumidifier is technically distilled water in that it does not contain minerals and other particulates that are removed in a true distillation process. However, a true distillation process condenses the steam of boiled water, and the boiling process kills any microbes and fungi that may be present in the pre-distilled water. Since the surface coils in a dehumidifier are not kept to food-grade cleanliness, microbes and fungi can (and probably do) exist in the collected water and it is therefore not considered safe to drink. In fact, as the water may sit for a while in the collection bucket, the water may be quite stale."

i would at least filter it though
babystarbud Reviewed by babystarbud on . Dehumidifier water can you use it for anything? Can the dehumidifier water be used for anything? Is it garbage water, whats in it? Rating: 5