The water losses are unavoidable and the amount of loss may vary depending on the type of mains material, structure and operational parameters. The evaluation of water loss is an individual issue and should be done in terms of length of mains. In accordance with IWA terms (International Water Associations) there’s more often used economic level of leakages then percentage of water loss. The paper refers to the efforts to reduce the losses in one of the largest water companies in Poland – in Krakow. Those efforts should be conducted according to established strategy and aim to optimize the costs of operation in Water Company.
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