The metal which atomic weight is more than 80 is known aa heavy metal. As, Pb, Cr, Cd is common heavy metal. Heavy metal pollution means that the heavy metal mixed with water and soil. Heavy metal pollution is great problem for the environment. It destroy the environment. Heavy metal is very harmful for for the human body. It damage the kidney, decrease the blood circulation. It also harmful for the man's skeleton. It is badly harmful for the river water. It is harmful for the fish and other animal who lives in the river. If the heavy metal concentration in river water is increase then water become harse. It distraction the river ecosystem. There are many method for determination of heavy metal in river water. The Common method is atomic absorption Spectroscopy. It is world widely use.