25 January 2018
The Council decided to temporarily treat Christchurch's drinking water with chlorine while work is fast-tracked on improving the city's well heads. This temporary measure will provide an extra level of protection against waterborne illnesses.
It will take about two months to set up the treatment facilities at the 56 pumping stations across the city before the chlorine will get into the water supply. We will update this page and the map below when the new water chlorination programme begins across the city.
Tap water in Christchurch city is still safe to drink. The quality of the groundwater remains excellent, and it is tested daily to ensure it is free of bacterial contaminants.
The Council resolved that long-term it wants to retain the city's untreated water supply system and will oppose any Government moves to impose mandatory permanent chlorination.
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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.