Water, an important element of the human environment, is essential for human and plant life. It is next to air. Clean water is safe for use and polluted water is harmful for man. Water can be polluted in many ways Farmers use chemical fertilizers and insecticide 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. Mills and factories pollute water by throwing the waste materials and unsold products into the rivers and canals Steamers, motor launches and even sail boats can pollute water by throwing oil, food waste and human waste into the rivers and canals. Unsanitary latrines in the countryside standing on the banks of the rivers and canals also pollute water. The kutcha drains running into the rivers and canals cause water pollution.