Chennai Metrowater begins upgrade of ageing sewer network in core areas
- Metrowater starts replacing old sewer lines in Chennai's central zones
- Project focuses on areas with frequent pipe collapses and blockages
- Upgrade expected to reduce sewage overflows during heavy rain
Old pipes trigger action
Chennai Metrowater has kicked off a significant upgrade of the city's ageing sewer network in core areas. The project targets zones where pipes have been in service for decades and are prone to frequent collapses and blockages.
Officials say the existing infrastructure in parts of central Chennai is over 40 years old. Corrosion and sediment buildup have reduced flow capacity, leading to overflows during heavy rain.
Priority zones identified
The first phase covers areas such as Triplicane, Mylapore, and parts of T. Nagar. These neighbourhoods have reported recurring sewage backups and street flooding after even moderate showers.
Metrowater has begun replacing sections of the trunk sewer lines with higher-density polyethylene (HDPE) pipes, which are more resistant to corrosion and ground movement. The work is being carried out in stretches to minimise disruption to traffic and residents.
Scope and timeline
According to Metrowater sources, the entire upgrade spans roughly 12 kilometres of sewer lines in the core city. The project is expected to be completed in phases over the next 18 months.
A senior Metrowater engineer said the new pipes have a design life of at least 50 years. The utility is also installing improved manhole covers and inspection chambers to allow easier maintenance.
Residents cautiously optimistic
Local residents have welcomed the move but expressed concern about construction delays and dust. Metrowater has assured that restoration of roads and footpaths will be completed promptly after pipe-laying.
Ward councillors have been asked to coordinate with the utility to ensure minimal inconvenience. The agency has set up a helpline for complaints related to the upgrade work.
Metrowater plans to extend the project to other old neighbourhoods like George Town and Saidapet in subsequent phases, depending on funding and contractor availability. The total cost of the core area upgrade has not been officially disclosed yet.
The upgrade comes ahead of the northeast monsoon, when sewage overflows typically spike. Officials hope the new network will significantly reduce such incidents.