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The aim of the study was an cause and effect analysis of water losses in the collective water supply system of the city located in south-eastern Poland. The exploitation data provided by the water supply company from 2012 - 2016 was used for the analysis. The study uses the recommendations of the IWA (International Water Association) for the water balance making and determination of water loss indicators. The values of water loss indicators were compared to international standards and the technical condition of the network was determined. In addition, failure rate analysis of the water supply network was performed based on the failure rate index λ. Based on the performed analysis, it was found that the water supply company should consider renovation or replacement of the main network pipelines to increase the safety level of water supply, reduce the amount of water losses and the company exploitation costs.

Water Loss Analysis as an Element of Operation Management of Water Supply System