Why Add Water?
Water can release volatile aromatic compounds that are bound to alcohol molecules. A few drops can "open up" a whisky, revealing hidden notes of fruit, flowers, or spice that were masked at full strength.
The Science
Research has shown that guaiacol, a compound responsible for smoky and spicy flavors, becomes more concentrated at the whisky-air interface when water is added. This enhances the aromatic experience.
How Much Water?
Start with just a few drops — a teaspoon at most. Add gradually and taste between additions. The goal is to enhance, not dilute. With cask strength whiskies, more water may be appropriate.
Best Practice
Always taste your whisky neat first, then experiment with water. Use still, room-temperature water, ideally the same water used in the whisky production if available.