Alert Level 2
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For a healthier harbour and coastal waters, we need to reduce the amount of untreated wastewater overflowing from the network. Overflows happen when wet weather increases the amount of water flowing through the network beyond the amount the pipes can carry.
To reduce overflows we're planning to build a storage tank in central Porirua, to help stop wastewater overflowing into Porirua Stream and Te Awarua-o-Porirua Harbour.
The proposed tank will be located north of Porirua railway station, between SH1 and the railway line (artist's impression shown above).
It will hold up to seven million litres (about three Olympic-sized swimming pools) of wastewater when there is heavy rain. Once the rain stops, the wastewater from the tank will be pumped to the Wastewater Treatment Plant in and fully treated.
Check out the latest flyover video on YouTube (August, 2021) here.
Proposed location for the tank
Community questions received