Water chlorination is the process of adding chlorine (C12) or hypochlorite to water. This method is used to kill certain bacteria and other microbes in tap water as chlorine is highly toxic. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, typhoid etc Chlorine is one of the most versatile chemicals used in water and waste water treatment. This powerful oxidizing agent is used for: ● Disinfection control of microorganisms ● removal of ammonia ● control of taste and odor ●colour reduction ● destruction of organic matter ● hydrogen sulfide oxidation iron and manganese oxidation.