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Deni Setiawan, S.T.
Journal of Engineering, Infrastructure and Geosciences (2025)
Municipal water utilities in middle-income countries commonly lose between a quarter and two-thirds of what they produce before it reaches a billed meter. Reform programmes usually treat this as an engineering problem, to be addressed after treatment capacity and source development. This study argues the ordering is inverted: loss and supply continuity are prior conditions on which every downstream investment depends. The method is a structured conceptual review of research published between 2017 and 2024 across water loss and pressure management, utility efficiency benchmarking, intermittent supply, asset management, and access measurement. Measured losses range from twenty-six to sixty-three per cent, with one metered district at fifty per cent of which about eighty-seven per cent was real loss. Pressure management, the least capital-intensive intervention available, reduced leakage by roughly a third in two independent case studies. Supply continuity, not source type, carries the measured health effect: one pragmatic trial reports an incidence rate ratio of 0.75 against confirmed cholera. One national assessment recorded mean technical efficiency of forty-nine per cent, and one analysis found only seven per cent of households with safely managed water free of contamination at point of use. Reform should begin with metering, pressure and continuity.