Water chlorination is the process of adding chlorine to the water supply to keep it safe from harmful bacteria. Sodium Hypochlorite is used in Christchurch. It can be added as a precaution after routine work, such as reservoir cleaning, or as a result of finding bacteria in the water supply during routine water sampling.
Chlorine may be noticed by its distinctive smell or taste, but in most cases these effects are diluted relatively quickly as the chlorinated water is mixed with fresh unchlorinated water.
The Christchurch water supply is made up of several zones that operate independently of each other.
Please note that the water supplies for Akaroa, Duvauchelle, Little River and Takamatua are permanently chlorinated.