Christchurch Tap Water
Water provider: Christchurch City Council Water (Christchurch)
Our recommendation
Mid-range filter recommended
Your water has detectable contaminants worth filtering. A countertop or under-sink carbon block with multi-stage filtration handles what is present here.
See recommended water filters →What is in the water
Chlorine
DetectedAdded to disinfect water. Generally safe at treatment levels but reacts with organic matter to form disinfection byproducts.
Reported: chlorination introduced post-earthquake
Trihalomethanes (THMs)
DetectedDisinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure linked to cancer risk.
Reported: low levels
Source
Data from the Christchurch Water Quality (2023). Last reviewed 2024-11-01.
Note: Contaminant levels vary by address (older plumbing can leach lead even when the source water does not), sampling location, and time of year. The figures above reflect utility-wide averages from the most recent public report. If you have specific health concerns, request a full report from your utility or test your own tap water.