对使用点水处理设备进行了调查，以确定可能会在这些过滤器中定植的微生物，确定日常使用期间或不使用期间微生物在定植后释放到产品水中的程度，并证明具有边际细菌学质量的自来水对产品水质量的影响。研究发现，在相同设计的不同单元之间，以及在一天中不同时间从同一过滤单元收集的水样之间，细菌数量存在差异；它受滤芯使用时间、滤芯设计、水温以及微生物种类的影响。在这项为期三年的实验室调查中，选择的过滤器是那些设计用于连接厨房水槽下的冷水管线，并与普通混合水龙头垂直的过滤器。讨论与使用这些设备相关的健康影响，并强调这一点- 本文介绍了水处理装置的设计考虑因素。包括26个参考文献、表格和图表。

Point-of-use water treatment devices were investigated to identify organisms that may colonize these filters, to determine the magnitude of the postcolonization release of microorganisms into the product water during daily use or after periods of nonuse, and to demonstrate the effect of tap water of marginal bacteriological quality on the quality of the product water. The bacterial count was found to vary between units of the same design, and between water samples from the same filter unit collected at different times of the day; it was affected by the length of time the filter cartridge had been in use, the design of the cartridge, and the temperature of the water, as well as by the species of microorganism. The filters chosen for this three-year laboratory investigation were those designed to be connected to the cold water line under the kitchen sink and plumbed to a common mixing faucet. A discussion of the health effects associated with the use of these devices and of point-of-use water treatment unit design considerations is included in this article. Includes 26 references, tables, figures.