本文中提供的信息是作为持续研究的一部分开发的 AwwaRF项目#3116，管理和应对总大肠菌群和大肠杆菌的策略 在分配系统中。本文的目的是描述 确定大肠菌群阳性原因的实用程序和用于缓解感染的策略 事件发生基于为本项目开发的案例研究总结 AwwaRF项目。这些案例研究展示了当前行业实践和 也可作为解决微生物问题的策略示例 分配系统。此外，本文还介绍了一项调查的结果 在微生物源追踪工具和策略专家研讨会上进行 公用设施可以应用于不同的微生物水质场景。合适的 调查和缓解策略取决于多个因素，包括 微生物问题的疑似原因，总大肠菌群的类型，或 系统遇到的问题，以及影响分配的系统特定因素 系统水质。由于与这些问题相关的变量范围广泛 AwwaRF项目团队正在开发一个可供公用事业公司使用的策略工具箱 基于系统的具体情况。包括表格、数字。

The information presented in this paper has been developed as part of an ongoing AwwaRF Project #3116, Strategy to Manage and Respond to Total Coliform and E. coli in the Distribution System. The objective of this paper was to describe strategies used by utilities to identify causes of coliform positives and strategies used to mitigate occurrences based on a summary of case studies that have been developed for the AwwaRF project. These case studies present examples of current industry practices and also serve as examples of strategies that may be used to address microbial problems in the distribution system. Additionally, this paper presents the results of a survey conducted at an Experts Workshop on microbial source tracking tools and strategies that utilities could apply in different microbial water quality scenarios. The appropriate strategies for investigation and mitigation depend on multiple factors including the suspected cause of the microbial problem, the type of Total Coliform Rule violation or problem the system is experiencing, and system-specific factors affecting distribution system water quality. Due to the wide range of variables associated with these issues, the AwwaRF Project Team is developing a toolbox of strategies that can be used by utilities based on system-specific circumstances. Includes tables, figures.