Before discussing what water purifiers do, we need to define “pure.” In regards to water, this means only hydrogen and oxygen molecules without any other substances. Pure water cannot be found naturally because all water has some forms of impurities. This means that it contains a wide range of contaminants including industrial waste, pesticides and even bacteria and viruses.
The EPA and the water industry have redefined pure water as water which does not contain bacteria. When you use purifiers, you are removing these contaminants. More complex systems use ion exchange. Commonly used forms of this are called water softening or deionization. Reverse osmosis purifiers are becoming increasingly popular for home use. After an initial expense, they become effective ways of assuring that bacteria are removed from water along with other contaminants.
Many filters are also purifiers in some sense. It is important that you understand what water purifiers can remove and how this differs from water filtration systems. While purifiers are removing most harmful bacterium and viruses, they do not attend to undesirable minerals and chemicals. For some, purifiers may even be preferred because they leave the healthy aspects of water. Find out what your priorities are and what your water treatment options are before buying.
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