River gets polluted by the means of human hands. Water is getting polluted by dumping waste into this kind of river streams. Household waste, industrial waste, sewage waste are all coming to the river or any other water stream and gets polluted by harsh chemicals. These chemicals are eaten by the small aquatic organisms and die. Most of the water pollution occurs due to wastes released by chemical factories, oil factories or oil spill accidents. The release of this excreta in water poses a major to water and thereby affecting the living too.