Milnerton will receive a major infrastructure overhaul as the City of Cape Town has confirmed that work on a R12-million sewer upgrade project will begin on 15 January. The project targets aging pipeline networks in the northern suburbs of the Western Cape province, where residents have reported recurring blockages and overflows for years. Officials say the investment represents one of the largest single allocations to wastewater infrastructure in the area this decade.
What the upgrade involves
The R12-million budget will fund the replacement of approximately 2.4 kilometres of deteriorated sewer mains across three neighbourhoods in Milnerton. Engineers will install high-density polyethylene pipes designed to last at least 50 years, replacing cast-iron lines that date back to the 1970s. The project also includes new pump station equipment and automated monitoring systems that will allow maintenance teams to respond to faults remotely.
Contractors hired by the City will work in phased sections to minimise disruption to traffic along Marine Drive, a major arterial route. Each work zone will remain active for roughly six weeks before crews move to the next segment. The City has published a tentative schedule showing completion targeted for late October.
Why Milnerton was selected
Milnerton sits adjacent to the Diep River estuary and handles wastewater from a population that has grown significantly since the original infrastructure was laid. Between 2010 and 2023, the suburb's residential density increased by an estimated 34 percent, according to municipal planning records. The existing network was never designed for that volume, and regular system failures have followed.
Local ward councillors submitted three separate petitions to the City between 2019 and 2022 requesting intervention. The petitions cited property damage from sewer backups, foul odours near schools, and environmental concerns about effluent entering storm drains. Those submissions helped push the project up the City's capital works priority list.
Resident impact and community concerns
Residents near the planned work zones have welcomed the announcement but expressed frustration about the timeline. "We have been dealing with slow drains and occasional flooding for years," said one homeowner in Woodridge who asked not to be named. "It is good that something is finally happening, but we need this done properly, not just patched up again."
The City has pledged to maintain sewer service throughout construction. Traffic management plans include temporary lane closures and signage along Marine Drive, with peak-hour restrictions in place between 09:00 and 15:00 on weekdays. Business owners along the affected stretch have been offered access arrangements to minimise trading disruption.
City priorities and infrastructure spending
The upgrade forms part of a broader R2.3-billion capital programme the City announced in its 2024/25 financial plan. That programme earmarked funds for water treatment plants, pipe network renewal, and flood mitigation across Cape Town. Sewer renewals account for roughly 18 percent of the total allocation, with Milnerton receiving the largest single project under that category this year.
Mayco member for infrastructure services told reporters that the City had shifted its approach after a 2022 audit revealed nearly a third of Cape Town's sewer network was beyond its design life. "We are being deliberate about where we invest first," the official said during a press briefing. "Milnerton scored high on risk because of the environmental sensitivity of the estuary."
Environmental considerations
The Diep River estuary is a protected environment under the National Environmental Management Act. Any construction work near the waterway requires compliance with strict runoff and spill prevention protocols. The City's environmental impact assessment for the project identified three potential risk points where leaking wastewater could reach the estuary during heavy rainfall.
To address those risks, the project includes the installation of backflow prevention valves and upgraded containment barriers at low-lying junctions. An independent environmental auditor will conduct quarterly inspections throughout the construction phase and submit reports to the provincial Department of Environmental Affairs.
Looking ahead: what happens next
The City will host two public information sessions in Milnerton during the first week of December, where residents can review detailed construction plans and ask questions directly to project managers. Those sessions will take place at the Milnerton Civic Centre on 3 December and 5 December, both starting at 18:00.
After the December meetings, the City will finalise contractor mobilisation and begin setting up the first work zone near the Sandbaai junction. If the schedule holds, residents could see operational improvements within six months of the January start date. The next major milestone to watch is the award of the environmental auditor contract, expected before the end of November.
See Also
Mayco member for infrastructure services told reporters that the City had shifted its approach after a 2022 audit revealed nearly a third of Cape Town's sewer network was beyond its design life. The City's environmental impact assessment for the project identified three potential risk points where leaking wastewater could reach the estuary during heavy rainfall.
