Climate change has clearly affected the desert city of Bechar, located in southern Algeria, and this miserable situation for the supply of drinking water prompted the authorities to provide capabilities and funds to bring groundwater located 250 km away and transfer it to the city of Bechar. The characterization of these underground waters presents a bicarbonate-magnesian facies according to the diagram of Schöeller and Berkaloff; the representation of the data on the triangular Piper diagram shows that Boussir ground water has the magnesium bicarbonate facies. The calculation of the quality index (GWQI) shows that all samples taken from the boreholes belong to the good quality category. The long distance of diversion of this underground water and the quality of the materials used in the project under a dry desert climate made us carry out the process of monitoring and tracking the quality of the water from the well until it reaches the consumer. The results revealed that all the levels of the physic-chemical parameters do not exceed the WHO portability standards, except that a variation of certain values was observed at the level of the storage tank, this variation due to the mode of filling and the mixing of water in tubular form, without eliminating the effect of water stagnation. If we technically know how to produce high-quality drinking water, we cannot always ensure a safe and sustainable water supply of the same quality in distribution networks and reservoirs; it is from this principle that our article is based in order to reinforce the monitoring role.

气候变化明显影响了位于阿尔及利亚南部的沙漠城市贝查尔，这种糟糕的饮用水供应状况促使当局提供能力和资金，将位于250公里外的地下水输送到贝查尔市。根据Schöeller和Berkaloff图，这些地下水的特征呈现出碳酸氢盐-镁相； Piper 三角图上的数据表示表明 Boussir 地下水具有碳酸氢镁相。质量指数（GWQI）的计算表明，从钻孔中采集的所有样品都属于良好质量类别。由于地下水的引水距离较远，加上该项目在干燥的沙漠气候下使用的材料的质量，使得我们对从井中到到达消费者的水的质量进行了监测和跟踪的过程。结果显示，除了在储罐液位观察到某些值有所变化外，所有理化参数的水平均未超出世界卫生组织的便携性标准，这种变化是由于灌装方式和混合方式造成的。水以管状形式存在，不消除水滞效应。如果我们在技术上知道如何生产高质量的饮用水，我们就无法始终确保配水管网和水库安全、可持续地供应相同质量的水；我们的文章正是基于这一原则，以加强监督作用。