Distilled water is a type of demineralized water that is purified using the process of distillation to remove salts and particulates. Usually, the source water is boiled and the steam is collected and condensed to yield distilled water. The source water for distillation can be tap water, but spring water is most commonly used.

Why does distilled water not conduct electricity, whereas rainwater does ? Distilled water does not conduct electricity because it does not contain any ionic compound (like acids, bases or salts) dissolved in it. Rainwater, while falling to the earth through the atmosphere, dissolves an acidic gas carbon dioxide from the air and forms carbonic.