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Nabadiganta at Salt Lake Sector V, had no organized water supply & sewerage system. This water supply and sewerage project was conceived by UD Department of Government of West Bengal, KMDA & NDITA to create infrastructures on BOT basis in PPP Model.

The influencing Factors for the Project were:-
i) Indiscriminate abstraction of ground water in Nabadiganta Area causing depletion of natural ground water table and harming the environment
ii) Unhygienic arsenic contaminated ground water drawn from bore-wells
iii) Disposal of untreated sewage polluting environment.

Naba Diganta Water Management Limited (NDWML), a Joint Venture (JV) of Tata Steel Utilities & Infrastructure Services Ltd. (Tata Steel UISL) and VOLTAS (both TATA Enterprises), was selected as private partners through a tendering process to build and operate the project. A Development Agreement was signed between NDITA, KMDA and NDWML in 2007 giving NDWML a mandate to provide services for 30 years.The entire infrastructure was created at a cost of about Rs. 72Crores. This is a pioneering PPP project in Urban Infrastructure Sector in the state of West Bengal and India.

NDWML is providing water supply and sewerage services at Nabadiganta 24*7 from its commissioning in January, 2011. Its service covers more about 90% of the premises under Nabadiganta Command Area. The term and conditions of services between NDWML and its Customers are guided by User Agreements.

NDWML is committed to provide world class services to its customers. Adopting industry best practices like Metering and Billing through advanced software, Single-Window Customer Complaint Management System, Use of latest technology for water wastage reduction, House Service Connections with modern water meters are few examples of quality services.