Water is a most precious thing for human beings. It is impossible to survive without drinking water. We should drink at least 10-12 glasses of water to be in good health. Drinking water should be free from impurities of all kind. Water which comes from taps is basically the water which comes from Municipal Corporation. These are unfit for drinking. Tap water is impure as it contains many chemicals which are mixed with the water for cleaning it. Water which is used for drinking should be cleaned before drinking them. Water which has impurities do lot of harm to our body. Water contamination is a rising cause of health concern. Drinking contaminated water leads to a kind of poisoning and causes many diseases such as diarrhea. Water therefore should be cleaned before using them. There are many ways of cleaning drinking water. Filtration is one of the most common ways of cleaning drinking water. There are varieties of filters available in the market. Filter which suits the need most should be bought and installed in the kitchen. Drinking filter water protects one from various water born diseases. Distillation, bottled water, reverse osmosis is some methods used by many people to obtain clean drinking water from impure water. Water can even be boiled to remove impurities from it. There are several side effects of drinking tap water. Firstly it has impurities and other suspended particles of carbon monoxide or asbestos mixed in it. Secondly chemicals such as chlorine are used while treating water before supplying it to the taps of our homes. In this process water loses its essential minerals and become unfit for drinking. Drinking this water can even cause diseases. One should therefore make it a point not to use tap water for drinking purpose. Water should be filtered before using it. Filtered water is pure and free from impurities. Such water is clean and can easily be used for drinking.