What Is Distilled Water?

This is a typical equipment set up for double distillation of water.
This is a typical equipment set up for double distillation of water. Guruleninn, Creative Commons

You can find distilled water in stores and labs. Here's an explanation of what distilled water is and how it's made.

Distilled water is water purified by boiling the water and collecting the steam. The steam is recovered by condensing the cleaner water vapor into a fresh container. The distillation process removes most impurities, so it is an effective method of water treatment.

Distilled Water for Drinking Water

Water distillation dates back at least to the time of Aristotle.

It has been used to desalinate sea water since at least 200 AD, as outlined by Alexander of Aphrodisias. Drinking water usually is distilled twice or double distilled to ensure high purity. Double distilled water is so clean some researchers are concerned the water may cause health problems because it does not contain natural minerals and ions that are desirable in drinking water.

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