Wastewater from private residences and non-domestic sites goes into the wastewater network and is pumped to treatment plants for treatment and disposal. The main network runs through Puhinui, Papatoetoe, Middlemore and Hunters Corner and connects to the large Southern Interceptor. In the north, it feeds into the large Ōtara branch rising main that joins the Southern Interceptor. Along the route there are pump stations on Hillside Road (Papatoetoe West) and Diversey Lane (Puhinui) that feed into the Middlemore pump station.
We are planning infrastructure investment over the next few years. These works involve future network upgrades to manage wet weather overflows and cater for population growth. The upgrades will include a new wastewater storage tank at pump station 31 in Ōtara (Billington reserve) and repurposing a section of the old Hūnua 4 watermain to divert the southern part of the network to the terminal pump station.
Drinking water for the area comes from the Ardmore and Waikato water treatment plants. Flowing from the large reservoirs on Redoubt Road
the main water pipes take two different routes at Flat Bush, with the Hūnua 4 watermain heading west through Papatoetoe and the Hūnua 3 watermain heading north through Ōtara. Water reservoirs are placed along the network to ensure supply during times of peak demand and smooth flows during the day. The significant expansion of Redoubt Road reservoir
will provide more storage capacity and add resilience to the network.