Addition of chlorine to water until there is enough chlorine present for disinfection of water. Breakpoint chlorination is defined as the stage where all of the unwanted pollutants have been oxidized and the disinfection requirements are met. Users will realize they are the breakpoint chlorination point of the disinfection process when there is no longer any need of adding more chlorine or oxidizers. Pool owners think of breakpoint chlorination as a measurement of free chlorine that is enough to completely eliminate chloramines, or other forms of chlorines in the pool. If the threshold has not been reached then the pollutants will remain in the pool and using more oxiders than is required will run the risks of overdosing.