本文介绍了欧洲共同体饮用水指令的相关要求，并概述了欧盟15个成员国和瑞士如何实施这些要求。欧洲国家在消毒和分配系统内消毒剂残留物使用方面的国家要求或指南存在很大差异。虽然一些欧洲国家要求对所有供水进行消毒，并保留消毒剂残留物，但一些国家不要求消毒或使用消毒剂残留物。一些国家采取中间立场，许多国家已经超过了该指令的要求。许多因素影响着各国的做法，包括水源的性质和质量、气象条件、去除杂质的处理程度、对消毒副产品的担忧，以及分配系统的运行和状况。 还介绍了最近商定的新饮用水指令。包括参考，表格。

This article describes the relevant requirements of the European Community Drinking Water Directive and outlines how the European Union's 15 member states and Switzerland have implemented them. European countries vary considerably in their national requirements or guidance on disinfection and the use of disinfectant residuals within the distribution system. Although a few European countries require all water supplies to be disinfected and a disinfectant residual to be maintained, some countries do not require disinfection or the use of a disinfectant residual. Some countries adopt intermediate positions, and many countries have exceeded the directive's requirements. A number of factors influence countries' practices, including the nature and quality of their water sources, meteorological conditions, the degree of treatment provided to remove impurities, concern about disinfection byproducts, and the operation and condition of the distribution system. A recently agreed on new Drinking Water Directive is also described. Includes reference, tables.