All plants need some sort of moisture near their roots to sustain photosynthesis. Using regular tap water can harm roots due to the chlorine and the extreme ph of the H2O.
Also bottled water, or filtered water does not guarantee that the liquid will be safe for plants. Just like in an aquarium type situation, the water quality for growing plants has to be almost “perfect.” The science of perfecting that water/growing solution for many different plants is called Hydroponics.
Here are a few videos to show the water results in Potential Hydrogen tests done on bottled water and aquariums.