L&T’s Water & Effluent Treatment (WET) business brings a refined blend of engineering prowess and forward-thinking innovation to the complex world of water management.

The WET business vertical specialises in developing large-scale water infrastructure projects. It provides comprehensive solutions for drinking water supply, wastewater and sewage treatment, industrial effluent treatment, desalination and irrigation systems.

The division takes up end-to-end water infrastructure projects - covering design, engineering, procurement, construction, commissioning and operations & maintenance - with a strong presence across India, Sri Lanka, West Asia and Africa.

With strong technical expertise and a wide project portfolio across India and international locations, L&T WET plays a vital role in ensuring sustainable water management, improving public health and supporting urban and industrial development through reliable and efficient water solutions.

Track Record

(* data include ongoing projects)

New Orders

• 6 Projects
• 4 Water supply
• 1 Wastewater treatment plants
• 1 Large water systems

The business has bagged the following major orders in FY26

• Southeast Guwahati Water Supply Project, Assam – intake with 98 MLD WTP, 555 km pipeline network
• Jhunjhunu - Surajgarh Water Supply Scheme, Rajasthan – 5,000 km pipeline network with pump houses and 170 service reservoirs
• UGPL Salandi Left Main Canal Project, Odisha – distribution system for 12,155 hectares
• Kekri-Sarwar Water Supply Project, Rajasthan – 43 km pipeline network
• Molarband STP, Delhi – sewage treatment plant with in-house AGBR technology

Major Ongoing projects

• 360 MLD Wastewater Treatment Facility at Bandra, Mumbai
• Kukshi Micro Lift Irrigation Scheme, Madhya Pradesh
• Hatpipaliya Micro Lift Irrigation Project, Madhya Pradesh
• Firozabad Package - 2, Uttar Pradesh
• Ballia Water Supply Scheme, Uttar Pradesh
• KUIDFC – 24x7 Water Supply Packages, Karnataka
• Ras Mohasein – 300 MLD Desalination, KSA

Completed projects :

• 13 Projects
• 1 Large water systems
• 8 Rural & urban water supply
• 3 Wastewater treatment plant
• 2 Water international

Commissioned Projects

More than three million people benefitted with the commissioning of 13 projects during FY 2025-26. Some of the major projects commissioned during the year are:

• Lower Suktel Underground Pipeline Irrigation project, Odisha
• Kundalia Irrigation Project, Madhya Pradesh
• Mohanpura Water Supply Scheme, Madhya Pradesh
• Navda to Chavand Bulk Pipeline Project, Gujarat
• Coimbatore 30.54 MLD Sewerage Treatment Plant, Tamil Nadu
• Water Transmission Project in Ad Dakhiliyah, Oman
• Dubai Water Supply System, UAE

Special Initiatives

• The business is leveraging its Water Technology Centre to roll out technology-led initiatives, focused on introducing new processes and enhancing existing ones
• To strengthen its presence in technology-focused markets, the New Business Incubation Cell has been formed to focus on identifying and developing opportunities in untapped segments to support sustainable growth over the long-term
• To drive productivity, quality and speed of execution, a Fast Construct Cell has been formed to promote the adoption of precast construction technologies across projects
• Real-time risk monitoring systems are being deployed across project sites, alongside the implementation of control measures and standardised control procedures across risk profiles, to enhance operational excellence and strengthen safety awareness

Facilities

The L&T Water Technology Centre (WTC) is the dedicated R&D and innovation arm of L&T’s Water & Effluent Treatment business, focused on developing reliable, energy-efficient and sustainable water solutions aligned with L&T’s energy, carbon and water neutrality goals.

Equipped with advanced facilities - including analytical, microbiology, process testing, desalination and digital labs - WTC leverages multidisciplinary expertise and global collaboration to deliver efficient, resilient and scalable water solutions.

Key Geographies