Water, an important element of the human environment, is essential for human and plant life. It is next to air. Water can be polluted in many ways. First of all, farmers use chemical fertilizers and insecticides in their fields to grow more food. The rain and floods wash away some of the chemicals. They get mixed with river water, canal water, and pond water. Secondly, mills and factories pollute water by throwing the waste materials and unsold products into the rivers and canals. Thirdly steamers, motor launches, and even sail boats can pollute water by throwing off, food waste and human waste into the rivers and canals. Moreover, unsanitary latrines in the countryside standing on the banks of the rivers and canals also pollute water. Besides the kutcha drains running into the Tivers and canals cause water pollution. Clean water is safe for use and polluted water is harmful for man Water pollution can be prevented in many ways. First of all, we should make the people aware of the fact that water is next to air. It is called life. So fertilizer, chemicals, and pesticide should not be allowed to mix with river water, canal water and pond water. Mills and factories should not throw the waste materials and unsold products into rivers and canals. Steamers, motor launches and even sail boats should not throw oil, food waste, and human waste into the rivers and canals. Unsanitary latrines in the countryside should not be built on the banks of the rivers and canals. In fine awareness should be created in the public.