本文介绍了应用“综合方法”获得的结果 结合了水质、系统运行和维护数据的使用， 水力模型和地理信息系统，以确定 拉瓦尔市配送系统收集的总阳性大肠菌群样本 （加拿大魁北克），1997年至2000年。使用这种方法，几乎一半（43%）的 大肠菌群病例有一个（或多个）高度可能的原因。在这些原因中 配水系统是否存在诸如管道冲洗、局部低压和 阀门和消防栓操作。水处理厂事件，例如在 工厂的出口也与分布中的阳性大肠菌群样本有关 系统（DS）。通常在夏季观察到的耗水量峰值（有 处理厂（WTP）外水质可能退化的结果 由于处理过程的“压力”增加和/或液压干扰 造成沉积物再悬浮的一个主要因素 在这种疾病中大肠菌群的发生中所起的作用。 包括13个参考文献、表格、图表。

This paper presents the results obtained from the application of an "integrated approach" that combines the use of water quality, system operation and maintenance data, hydraulic model and geographical information systems to identify the main causes of total positive coliform samples collected in the distribution system of the city of Laval (Quebec, Canada), from 1997 to 2000. Using this approach, almost half (43%) of the coliform cases had one (or more) highly probable cause identified. Among those causes are distribution system types of events such as pipe flushing, localized low pressures, and valve and hydrant operation. Water treatment plant events such as measured coliforms at the outlet of the plant were also associated to positive coliform samples in the distribution system (DS). Peaks in water consumption typically observed during summertime (with the outcome of potentially degraded water quality out of the treatment plant (WTP) because of increased "pressure" on the treatment processes and/or hydraulic disturbances in the DS causing sediment resuspension) also constitute a factor that could play a major role in the occurrence of coliforms in this DS. Includes 13 references, tables, figures.