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Searching Out and Finding a Cost-Effective NRW Reduction Strategy
Batam Island, Indonesia


Batam's raw water resources are limited; as an island close to Singapore with 10% annual population growth and major commercial development potential, all water sources will likely be exhausted by 2017. The availability of an adequate water supply will be a major restriction on the continued dynamic development on the Island.


Project Goal

To conduct a feasibility study for a comprehensive NRW management program to adequately prepare for future population demands; to provide a plan for both commercial and physical loss reduction by at least 50%.


Project Scope

The scope of the study included:


  • Detailed NRW assessment
  • Preparation of the water balance and Performance Indicators (PIs)
  • Design of a tailored NRW management strategy
  • Financial analysis, including cost/benefit analysis of the different options

The analysis of the NRW situation of ATB (Batam water utility) was based on available documentation and the following field works carried out by Miya during the study period:


  • Detailed assessment of domestic and non‐domestic water meters condition
  • Review of ATB's major production meters
  • Pressure measurements at 50 locations throughout the distribution system to determine the weighted average pressure.
  • Detailed review of the NRW situation in key representative locations
  • Review of ATB's existing software/systems and associated requirements



Recommendations provided for how to reduce NRW by 50% through both physical and commercial loss reduction.


  • Assuming such a 50% reduction, some 30,000 m3/day could be recovered - this would translate directly to higher revenues
  • Reduction of physical losses would make water that could potentially be sold to new customers available
  • If all water recovered from leakage reduction could be sold to new customers, Billed Volume would increase by around ten million cubic meters per year and at an average tariff of IDR 6,000, ATB would be able to generate additional revenues of IDR 60 billion (US$ 6.5 million) per year