Wastewater from private residences and non-domestic sites goes into the wastewater network and is pumped to treatment plants for treatment and disposal. The wastewater network in this local board area is spread over the Puhinui and Pahurehure inlet catchment areas. The main wastewater line is the Southwestern Interceptor which runs from south to north. Flows are boosted by two large pump stations at Manurewa South and Manurewa West. The main interceptor line is fed by Mahia that serves Manurewa East, while the Weymouth line serves Manurewa and Homai, connecting through the Homai diversion pipe. Along the coast there are various pump stations around Wattle Downs and Weymouth that feed the wastewater along smaller pipes to the main interceptor pipe. All wastewater travels north to the Māngere wastewater treatment plant.
In Manurewa, the Hingaia Rising Main
project will increase network capacity to cater for proposed growth in Hingaia Peninsula, Drury and Ōpaheke.
Manurewa’s drinking water comes from the Ardmore and Waikato water treatment plants. In the south, the key watermain is Waikato 1, while Takanini 2 watermain in the main line in the south-east. Much of the water for the area, however, comes from giant reservoirs at Redoubt Road. The significant expansion of Redoubt Road reservoir
will increase storage capacity and network resilience.