If its tap water you get a chlorinated/fluoride flavor, sometimes from the tap it can taste a bit metallic. Bottled spring water is so filtered that you really can taste anything at all. So water really has no taste except for what's added to it or where its gotten from.
Water has the most complicated textures and taste that the human mouth can encounter. The texture has been commonly described as like licking a unicorns horn but the taste can only be described as a mix between hydrogen 2 and oxygen 1.