Water is a resource of prime importance. We need water for irrigation, industries, transport, drinking, bathing and several other purposes in every day life. Life on the earth would not have been evolved without water. Water has become indispensable for the disposal of urban sewage and dirt. Water is essential for the very existence of life on the globe. Without water we cannot survive. Agriculture is the major source of food for us. Water is essential for raising food crops. Fish which make up a large chunk of our food and their existence depends on water. Forests which provide us numerous things and keep our ecological balance intact also need water. Water is an excellent and cheap resource for generating hydroelectricity. It is a renewable and pollution-free source of energy, essential for modern comfortable living. Therefore, water is indispensable in our day to day life.