ISO 5667-5:2006确立了适用于人类饮用水取样技术的原则。就ISO 5667-5:2006而言，供人类饮用的水包括:所有处于原始状态或经过处理的水，用于饮用、烹饪、食品制备或其他生活用途，无论其来源如何，加上任何生产企业用于制造、加工、储存和储存的所有水，保存或销售供人类食用的产品或物质，除非国家主管当局确信水质不会影响成品食品的健康。 ISO 5667中给出的指南- 5:2006仅限于从市政或类似配水系统（包括单个系统）取水的情况，在此情况下，事先处理和/或质量评估已将水归类为适合饮用或饮用工艺用途的水。具体而言，ISO 5667-5:2006适用于与分配系统中的任何使用阶段（包括使用点）相关的连续供水。这包括在可能适用额外水质管理的大型建筑物内进行分配。 ISO 5667-5:2006也适用于与系统缺陷调查相关的取样情况，或取样操作人员安全不受影响的紧急情况。 ISO 5667-5:2006未提供水源或使用饮用水生产的产品的指南。以下项目是本文件未涉及的案例示例:水源水取样，例如地下水和地表水蓄水；从非连续来源（例如，从道路罐车）获得的饮用水供应取样；飞机、火车和船舶散装储水取样；饮料产品（包括瓶装水）或含有饮用水的食品的取样；分发未密封饮料杯的饮料自动售货机抽样。

ISO 5667-5:2006 establishes principles to be applied to the techniques of sampling water intended for human consumption. For the purposes of ISO 5667-5:2006, water intended for human consumption comprises: all water either in its original state or after treatment, intended for drinking, cooking, food preparation, or other domestic purposes, regardless of its origin, plus all water used in any production undertaking for the manufacture, processing, preservation or marketing of products or substances intended for human consumption unless the competent national authorities are satisfied that the quality of the water cannot affect the wholesomeness of the foodstuff in its finished form. The guidance given in ISO 5667-5:2006 is confined to those circumstances where water is drawn from municipal or similar distribution systems (including individual systems) where prior treatment and/or quality assessment has resulted in the water being classified as suitable for drinking or potable process purposes. Specifically, ISO 5667-5:2006 is applicable to water that is in continuous supply relative to any stage of use up to and including the point of consumption in a distribution system. This includes distribution within large buildings in which additional water quality management might be applicable. ISO 5667-5:2006 is also applicable to sampling situations that can arise relative to the investigation of system defects or emergency situations where the safety of sampling operatives is not compromised. ISO 5667-5:2006 does not provide guidance for water sources or for products generated by using drinking water. The followings items are examples of cases not addressed by the present document: the sampling of source water, for example groundwater and surface water impoundments; sampling of drinking water supplies derived from non-continuous sources (for example, from road tankers); sampling of bulk storage of water on airplanes, trains and ships; the sampling of beverage products (including bottled waters) or food containing potable water used in its preparation; sampling of drink vending machines that dispense unsealed cups of drinks.