Today, desalination is far from perfect, so scientists have developed powerful alternatives for water purification. Some of these methods do not rely on the production of new water, but on the recycling of fresh water that has been used for other purposes. Grey water, including water used in dishwashers, washing machines, sinks and showers, can be reused many times, thereby reducing the need for pure water.

Although these water filtration methods are common, a new generation of advanced water filtration technology is changing the way water is purified. Compared with the methods that the society is already familiar with, these methods can be more effective and effective in removing pollutants and other undesirable substances. Currently, these methods are almost entirely used in industrial applications, but as their use expands, they can eventually be found in the home.