There is no life without water - it has a vast range of applications. It is a medium that allows us to function on many different levels, it is used in the agriculture, in the industry. Water treated for industrial purposes must be soft enough not to cause damage to systems, machinery and its own flow paths.
Water is used primarily for drinking. That is why it is so important to make sure that its quality is good enough for us to use it safely. It is critical to remove all viruses and bacteria from drinking water as they can pose a serious threat to a human body.