In a method of assessing a plurality of water recipes and selecting a water recipe suitable for a user, wherein the water recipe determines the concentration of ions in the water the following steps are performed: determining a plurality of water drinking purposes; assigning a set taste weighting to each of the plurality of water drinking purposes, wherein the set taste weighting indicates the weighting of the taste for selection the most suited water recipe; assigning a set mineralization weighting to each of the plurality of water drinking purposes, wherein the set mineralization weighting indicates the weighting of the mineralization for selection the most suited water recipe; and storing the set taste weighting and the set mineralization weighting for each of the plurality of water drinking purposes in a computer.