The Government of India and the Asian Development Bank (ADB) have signed a $230 million loan agreement to modernise and expand Chennai’s water supply and sanitation infrastructure, with a focus on climate resilience, public health and improved urban services.
The Chennai Climate-Resilient Water Security and Sewerage Project is aimed at expanding access to safe and reliable water and better sanitation services across the city while strengthening its ability to withstand climate-related risks.
The project is also expected to improve the efficiency and financial sustainability of Chennai’s urban water system.
The Government of India’s engagement with ADB for finalising the loan was undertaken under the guidance of Baldeo Purushartha, Joint Secretary (ADB & Japan), Department of Economic Affairs, Ministry of Finance.
The loan documents were signed by Saurabh Singh, Deputy Secretary, Department of Economic Affairs, on behalf of the Government of India, and Mio Oka, Country Director, India Resident Mission, on behalf of ADB.
170 km of new water and sewer pipes
The project will involve construction of more than 170 km of water supply and sewer pipes, besides upgrading seven water pumping stations and 38 sewer pumping stations.
It will also strengthen water utility assets and operations management through performance-based contracts.
A key feature will be the introduction of a comprehensive ring-main water supply system in Chennai. The city will become the first in India to implement such a system, according to ADB.
The closed-loop plumbing system is designed to maintain balanced water pressure and distribute water more efficiently across service areas. It is expected to improve reliability and equitable access while strengthening the city’s water supply network against natural hazards.
Digital transformation of water services
The project will also accelerate the digital transformation of Chennai’s water and sanitation services.
Real-time monitoring and data-driven decision-making systems will be introduced to improve utility operations and customer responsiveness.
Advanced technologies will also be deployed to reduce the need for hazardous manual sewer inspections. The system is expected to enable faster and safer detection of blockages while improving the safety of workers involved in sewer maintenance.
Distribution networks in at least two Greater Chennai zones will also be prepared for future investments under the project.
Builds on earlier urban infrastructure investments
ADB said the latest investment builds on its earlier projects aimed at expanding access to safe and equitable water and waste management services in Chennai.
The project aligns with the Government of India’s broader urban development initiatives, including the Atal Mission for Rejuvenation and Urban Transformation (AMRUT) 2.0 and the Urban Challenge Fund.
The investment comes as Chennai seeks to strengthen its water security while addressing the challenges posed by rapid urbanisation and climate change.
By combining physical infrastructure upgrades with digital monitoring and improved utility management, the project is expected to create a more resilient and efficient urban water system for the city.