SA Water has delivered a major milestone for Adelaide’s southern growth corridor.
The water services provider completed delivery of permanent wastewater infrastructure that includes approximately 2.1 kilometres of new sewer main.
These pipes range from 150 to 300 millimetres in diameter.
More than 1.1 kilometres of new trunk water main has now been constructed and commissioned ahead of schedule, ensuring a reliable water supply is ready to support the area’s southern development which includes 1,000 new homes to be built in the area now known as Onkaparinga Heights.
Some 230-hectares was rezoned beginning in 2015 with additional land rezoned in 2023 to allow for land division and housing to support growth in the area previously called Hackham.
A record $1.5 billion investment in housing infrastructure has made the water and sewer infrastructure possible.
SA Water’s General Manager of Growth Amanda Lewry said the early delivery of water services provides a solid foundation for development within Onkaparinga Heights.
“Having this critical water infrastructure in place early gives developers the certainty they need to move ahead with construction,” Lewry said.
“It is an important step for a growing part of Adelaide, and we are focused on delivering reliable services that support ongoing development.”
Residents are expected to move in during 2027.
SA Water has also confirmed it will deliver a permanent wastewater solution for up to 1,600 allotments, more than tripling the initial servicing capacity.
“Expanding the scope of the wastewater network means we can support a larger number of homes, while reducing the reliance on temporary wastewater tankering,” Lewry said.
“Temporary tankering remains a common and necessary interim measure to service new developments until they reach a population that generates sufficient wastewater flows to maintain normal infrastructure conditions within a permanent network.
“The network will cross Main South Road and connect into our existing system to service homes within the greenfield development.”
A delivery timeframe for the new wastewater infrastructure will be finalised in consultation with developers.
SA Water is also progressing with infrastructure plans for a further expansion of its water and sewer network in line with forecast development in the area, subject to funding availability in subsequent regulatory periods.