The aim of this study is to develop a methodological tool for the sustainable management of drinking water supply service (DWSS), taking into account local specificities of Algeria. This research is supporting the water utility (Algérienne Des Eaux: ADE) in its challenges to improve the quality of services undertaken for customers. The methodology consists of a construction phase and an evaluation phase. The construction phase is to identify the prior objectives and sub-objectives, as well as criteria and indicators of sustainability associated with them. The evaluation phase is to evaluate the performance of DWSS. The aggregation of indicators and criteria is carried out with the weighted sum method, the weighting is done with the analytical hierarchy process (AHP) method. The application takes place in the DWSS of Bejaia city, Algeria. The evaluation of the objective's performance studied in this paper showed a good level of performance. This tool has allowed the identification of indicators to improve. Targeted decisions can further improve their performance.

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