本文讨论了欧洲在its中引入风险评估/风险管理原则的努力 饮用水法规。世界卫生组织提出的水安全计划的概念 该组织已经适用，一些欧洲水务公司已经开始使用该技术 饮用水生产和分配的方法。定量微生物风险评估 构成了对水安全计划的有益补充，但该方法的标准化尚未实现 考虑到它的广泛使用，需要它。欧洲项目“微风险”解决了这一需求，该项目正在努力定义一种统一的方法，以便评估以下方面的问题: 不同病原体（大肠杆菌O157:H7、弯曲杆菌、隐孢子虫、贾第虫、， 肠道病毒（诺沃克病毒）在正常条件下以及导致快速和快速死亡的事件期间，在原水中传播 病原体负荷的重要变化； 处理效率； 配电网完整性； 饮用水消耗；和 消费者的感染风险。 该方法在不同的生产现场进行了测试，反映了环境因素的多样性 可在欧洲找到的条件、原水和处理管线。这个 该项目的主要成果是目前正在编制的指导性文件。本文举例说明了微风险项目解决的问题。 包括9个参考文献、图表。

This paper discusses European efforts to introduce risk assessment / risk management principles in its drinking water regulations. The concept of a Water Safety Plan, as proposed by the World Health Organization, is already applicable, and some European water utilities have already started using this methodology in drinking water production and distribution. Quantitative Microbial Risk Assessment constitutes a useful complement to a Water Safety Plan, but standardization of this methodology was needed in view of its widespread use. This need was addressed by the European project "Microrisk" that is working to define a harmonized methodology in order to assess issues with: the occurrence of different pathogens (E. coli O157:H7, Campylobacter, Cryptosporidium, Giardia, enterovirus, norovirus) in raw waters, under normal conditions and during events leading to fast and important changes in pathogens loads; treatment efficiency; distribution network integrity; drinking water consumption; and, the risk of infection for the consumer. The methodology was tested at different production sites, reflecting the diversity of environmental conditions, raw waters and treatment lines that can be found in Europe. The main outcome of this project is a guideline document currently under preparation. The paper gives examples of issues addressed by the microrisk project. Includes 9 references, figures.