Many of the false statements you read are provided and marketed by companies that manufacture and / or sell water filter machines. It is unfortunate that some of these companies still use this incorrect information as scare tactics so to sell their own products.

Luckily over the last 15 years consumers have been able to do their own research online so they are in a more informed position to make an informed choice.

Show me credible scientific evidence please! Ok, here goes...

Mother nature's 'Hydrologic Cycle'

Remember, distillation is as old as mother nature’s ‘Hydrologic Cycle’. This natural distillation method involves the sun heating the water on the earth's surface. The water is then turned into a vapour and rises while leaving contaminants behind before forming clouds. As the upper atmosphere drops in temperature the vapours cool and convert back to water to form droplets of water. When these water droplets drop to the earth's surface, as snow or rain (precipitation), the cycle repeats again.

When did we start understanding and using distillation?

Greek sailors used a form of distillation as they were known to hang sponges over pots of boiling sea (salt) water. The sailors would then squeeze out the collected water from the sponges. They found that the water squeezed out from the sponges contained no salt and was drinkable. Even today, US Navy uses distilled water derived from sea water for drinking water on-board ships.

To replicate Nature's "Hydrologic Cycle" method of producing pure water Water Distillers today are simply a man-made form of this cycle and used to remove many different kinds of contaminants including biological contaminants such as bacteria and viruses.