Water utilities evaluate the water distribution system performances by taking various performance indicators into consideration. However, it is necessary to digitize the current network characteristics and to provide hydraulic models, district metered area and pressure management system besides monitoring the water distribution systems by SCADA in order to identify an important part of these indicators. On the other hand, these studies are quite costly for underdeveloped countries including Turkey, so they are projected and applied partially in accordance with the budget of water utilities. Nevertheless, the utilities should control the network performance and make investments by taking the income and expenditure accounts into consideration. In this study, the network performances have been evaluated simply on the basis of the probabilities of exceedance determined with the help of innovative models based on risk calculations of non-revenue water volumes determined by using water supply and accrual amounts of the previous year held by water utilities. As a result, it is seen that the non-revenue water reduction performances of İzmit and Kandıra have the highest levels in the evaluation years (2017 and 2018) based on 2010–2016 time period. Körfez has also the highest performance after the above-mentioned districts. On the other hand, the lowest performance occurred in Derince for analysis years. Thanks to the approach suggested in this study, the network performances can be analyzed easily through the data on the previous year water supply and accrual, and thus, future strategies and plans can be identified considering the improvements made.

自来水公司通过考虑各种性能指标来评估配水系统的性能。但是，除了通过SCADA监控配水系统外，还必须数字化当前网络特征并提供水力模型，区域计量面积和压力管理系统，以识别这些指标的重要组成部分。另一方面，这些研究对于包括土耳其在内的不发达国家来说成本很高，因此，它们是根据自来水公司的预算进行预测和部分应用的。尽管如此，公用事业公司应该控制网络性能并通过考虑收入和支出来进行投资。在这个研究中，网络性能的评估仅基于借助创新模型确定的超出概率，该模型基于非收益水量的风险计算，该非收益水量的计算方法是使用供水设施的供水量和上一年的应计额确定的。结果，可以看出，基于2010-2016年期间，伊兹密特和坎迪拉的非收益减水绩效在评估年度（2017年和2018年）中最高。科尔菲斯在上述地区之后的表现也最高。另一方面，在分析年中，Derince的性能最低。由于这项研究中建议的方法，可以通过上一年的供水和应计收入数据轻松分析网络性能，因此，