Our wastewater network carries a combination of residential and commercial (businesses) waste.
Wastewater contains 99% water and about 1% human and other waste.
Because the waste component contains many bacteria and viruses that could be harmful to human health, it’s important it is kept separate from the drinking water network. This is in accordance with the Health Act 1956.
All wastewater is carried along the wastewater network and treated at one of our four wastewater treatment plants, before being discharged out to sea, unlike the stormwater network which mostly flows straight out through streams and rivers before ending out at sea.
The Wastewater Treatment Plants are owned by Wellington City Council, Hutt City Council and Porirua City Council and are managed in accordance with the Resource Management Act 1991.
To find out more about our Wastewater Treatment Plants click the name of each plant below.