Water disinfection is done by chlorine for which either bleaching powder or liquid chlorine is used. For safe drinking water, it is must that water should be treated with a proper amount of chlorinating agent. The excess or inadequate quantity of chlorinating agent results in quantity will not kill all pathogenic many problems. An inadequate present in water while the excess quantity of chlorinating microorganism agent leaves a strong pungent odour in the water and also make the water unpalatable for drinking. Excess chlorination also results in gastric irritation and other problems in body. Health Authorities, For above reasons all Water Works Departments, tests the chlorinated water for its Municipalities, Gram Panchayats chlorine content.