Not only can you do so but YOU SHOULD drink the water from the tap! – Our tap water is the water that we do bottle and export. It is rated and considered to be the purest water that you can have. We do not add anything to our water. Our water supply source is just outside Reykjavik in the middle of a lava field. The ground water runs through the lava and the lava functions as a filter and THEN we gather it and drink it. Sometimes you have to let the cold water run for a minute or so in order to have it ice-cold (do not worry about the water running for some time – we are not short on supply here and after all, it is a circulation, just like life is…).