Christchurch Wastewater Treatment Plant odour status

See the current status and the latest on potential stench from the Wastewater Treatment Plant and oxidation ponds.

The map below shows the current odour status of each of the oxidation ponds and the wastewater treatment plant.

See the latest on what we're doing to address odour.

Last updated 4 February 2026.

High probability of odour


Possible odour


Low probability of odour


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