Does the song mean it in the literal sense? Has anyone ever tried this?
distilling does take away the lime residue this should be left at the bottom of the container the contaminated water was boiled in. the distilled water should be in a different container with no impurities. When boiled the lime will be present as limescale like in a kettle this is hardly toxic unless you eat a load of it Otherwise im sure the water-board would have to remove it before letting us consume it.
Lime, or calcium carbonate, dissolves into groundwater or surface water that is in contact with limestone.