Water is supreme crucial part of human and animal life. Contaminated water is biggest problem in the world. Mercury a liquid metal which is also called as quicksilver. The level of mercury contamination in variouswater bodies. This contaminated water issued mainly for drinking and agriculture purpose. The major source of mercury contamination may be natural, industrial, sewage, agricultural, medical products, sediments, cement plants and fly ashes etc.Mercury is a highly poisonous metal which is mostly found in environment. The overdose toxic effect of mercury onthyroid gland, gastrointestinal tract, neurological, reproduction and sometime which may lead to death.

Keywords: Water; Mercury; Toxic; Contamination.