必须对配水系统水质进行监测，以符合法规（总大肠菌群规则、地表水处理规则）和水质问题（味道和气味、消毒副产品、腐蚀性等）。本文介绍了南加州大都会水区的监测方案。说明了采样位置、测试参数和测试时间表的数量。还测量了:可同化有机碳，这是生物再生的指标；隐孢子虫和军团菌等病原体。大都会计划在其整个配电系统中安装一个在线远程监控站系统。这些监测站将向一两个中心位置传输水质实时数据。由于新法规的范围，配电系统水质监测的频率和复杂性都在增加。 这一趋势有望在未来继续下去，增加水的成本和员工培训需求。同样重要的是越来越重视客户服务和对饮用水质量的满意度。

Distribution system water quality must be monitored to comply with regulations (Total Coliform Rule, Surface Water Treatment Rule) and water quality problems (taste and odor, disinfection byproducts, corrosivity, etc.) This paper describes the monitoring scheme for the Metropolitan Water District of Southern California. Number of sampling locations, parameters tested, and schedule of testing are stated. Also measured are: Assimilable organic carbon, an indicator of biological regrowth; pathogens such as Cryptosporidium and Legionella. Metropolitan plans to install a system of online remote monitoring stations throughout its distribution system. These stations will transmit real-time data on water quality to one or two central locations. Because of the range of new regulations, distribution system water quality monitoring is increasing in both frequency and complexity. This trend can be expected to continue in the future, increasing the cost of water and of staff training requirements. Also important is an increasing emphasis on customer service and satisfaction with drinking water quality.