本文旨在测试和说明加拿大魁北克省拉瓦尔市配水系统中大肠菌群控制的综合方法的应用。该系统使用三个水处理厂为大约30万用户提供服务。其中两个工厂的处理系统包括双介质砂和无烟煤过滤、臭氧氧化和氯化。另一个工厂包括动态沉降、快速过滤、臭氧氧化、生物活性炭（BAC）过滤和二氧化氯消毒。该系统的液压功能已通过Panet软件建模。已经收集了一个相当完整的数据库，涉及质量参数和干预措施（包括管道泄漏和破裂、冲洗、消防栓以及管道安装和修复）。 我们已经研究了这些措施对水质的影响，并将其作为两个案例进行介绍。包括15个参考文献、图表。

The purpose of this paper is to test and illustrate the application of anintegrated approach to the control of coliforms in the water distribution systemof the City of Laval, Quebec, Canada. This system serves about 300,000 consumersusing three water treatment plants. Treatment trains at two of these plantsconsist of dual media sand and anthracite filtration, ozonation, andchlorination. The other plant includes dynamic settling, rapid filtration,ozonation, biological activated carbon (BAC) filtration, and chlorine dioxidedisinfection. The hydraulic functioning of the system has been modeled with theEPANET software. A fairly complete database, related to quality parameters andinterventions (that include pipe leaks and breaks, flushing, hydrants, and pipeinstallation and rehabilitation) has been collected. The water quality impact of suchinterventions has been studied and is presented as two case studies. Includes 15 references, figures.