1 MLD treatment infrastructure
Expanded modular sewage reclamation capacity, with treatment tanks, aeration, filtration and ultrafiltration in a compact urban footprint.
Kotturpuram, Chennai · Project photographWater stewardship
Wastewater reuse in Chennai
Designed and implemented by SIV Impact for Amazon, this modular water reclamation project at Kotturpuram has expanded to 1 MLD capacity, connecting sewage treatment with planned reuse and healthier local waterways.
DELIVERY UPDATE
Operational. Expanded to 1 MLD.
Reported
The project entered its operational phase in October 2026. Its treatment capacity has expanded to 1 MLD, equivalent to one million litres per day. The focus now moves to reliable operation, water-quality testing and measurement of treated and reused water.
1 MLD
Expanded treatment capacity
Operational phase
Reported in October 2026
Capacity describes what the plant is designed to treat. Actual treated and reused volumes are tracked through operating records.
PROJECT GALLERY
A closer look at
water reuse in Chennai.
THE CHALLENGE
The need behind the project.
At Kotturpuram, near the Buckingham Canal–Adyar River confluence, sewage places pressure on local waterways and surrounding ecosystems. Chennai also needs dependable water for parks, landscapes and other uses that do not require drinking-water quality. The project addresses both needs by treating wastewater close to its source and establishing practical routes for reuse.
THE APPROACH
How the project responds.
The modular, space-efficient plant has an expanded treatment capacity of one million litres per day. It brings together treatment tanks, aeration equipment, pumps, filtration and ultrafiltration. The project plan connects reclaimed water with green-space irrigation, groundwater recharge, environmental improvement and suitable sanitation uses. Each reuse pathway depends on the required water quality, operating arrangements and relevant permissions.
SIV’S ROLE
What we bring to delivery.
SIV Impact designed and implemented the project for Amazon, coordinating government engagement, technical partners and site execution. Our role covers project design, partner management, construction and commissioning oversight, and the framework for measuring and reporting water outcomes.
INTENDED VALUE
What the work aims to change.
The project aims to reduce untreated sewage entering local waterways and create a useful water resource for the city. Reuse can reduce demand for freshwater, while better water quality and planned recharge support the wider Adyar catchment. These environmental and community benefits depend on sustained operation and verified performance.
PROJECT PARTNERS
Clear roles. Shared delivery.
Amazon funds the project. The Tamil Nadu Water Resources Department (TNWRD) and Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) are government stakeholders supporting permissions, coordination and technical oversight. CEMCOT provides technical consultancy, and GreenTech is the construction partner.
PROJECT SCOPE
What delivery
brings together.
Government and technical coordination
SIV connects Amazon, public agencies and technical partners around design, site delivery and operating responsibilities.
Reuse and ongoing operation
A defined plan for reclaimed-water uses, supported by operations, maintenance, flow records and water-quality testing.
CAPACITY & INTENDED OUTCOMES
Built for reuse.
Measured in operation.
1 million litres/day
Expanded treatment capacity
Less untreated sewage
Reduce pollution pressure on local waterways
Non-drinking reuse
Support irrigation, recharge and suitable sanitation uses
How performance will be assessed
The plant’s expanded capacity is one million litres per day. Actual treated and reused volumes depend on inflow, operating hours and water-quality performance. Inlet and outlet flow records, water-quality testing and evidence of the final reuse pathway will establish results. Treated volume, reused volume and any verified replenishment benefit will be reported separately.
The capacity figure describes the expanded plant design. Environmental and reuse benefits are intended outcomes, not measured results.
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