而饮用水系统安全一直是美国水资源管理局的一个重要问题 在处理设施方面，它已成为该国国内安全应对危机的关键 2001年9月11日的灾难性事件将美国定为恐怖分子的目标。在线 的 对饮用水分配系统的监测有助于消除污染 故意污染的危险，否则，只有通过 供水系统服务社区中的症状性事件。 七种可靠的饮用水化学污染物（涕灭威、放线菌酮、， 二氯磷、尼古丁、砷酸钠、氰化钠和氟乙酸钠）被禁用 在不同剂量浓度下测量，以确定其在饮用水中的可检测性 配水系统模型。这些污染物通过测量 常见水质参数，如电导率、pH值、余氯、浊度、， 总有机碳（TOC）和UV254作为指示分析物。 这项研究包括: 为每个水质参数建立基线； 测定实验室仪器对不同浓度污染物的响应 与经过处理的饮用水在台式容器中混合； 使用试验台数据将适当的污染物浓度引入试验台 由商用在线水质监测的配水系统 仪器；和 在实验室规模内确定指定污染物浓度的可检测性 分配系统。 结果表明，这七种化学污染物可以在相对较低的温度下检测到 常规监测的浓度。七种化学污染物中的一些可以 检测到的浓度低于会对健康造成重大影响的浓度。包括11个参考文献、表格、图表。

While drinking water system security has always been an important issue for U.S. water treatment facilities, it has become key in the country's domestic security response to the catastrophic events of September 11, 2001 that framed the U.S. as a terrorist target. Online monitoring of drinking water distribution systems offers potential in eliminating the danger of purposeful contamination that would, otherwise, be evident only through symptomatic events in the community served by the water system. Seven credible drinking water chemical contaminants (aldicarb, cycloheximide, dicrotophos, nicotine, sodium arsenate, sodium cyanide, and sodium fluoroacetate) were measured at different dosing concentrations to determine their detectability in a drinking water distribution system model. These contaminants were monitored by measuring common water quality parameters such as conductivity, pH, chlorine residual, turbidity, total organic carbon (TOC), and UV254 as indicator analytes. This study included: establishing a baseline for each water quality parameter; determining laboratory instrument response to various concentrations of contaminant mixed with treated drinking water in benchtop containers; using benchtop data to introduce appropriate contaminant concentrations into a benchscale distribution system monitored by commercially available on-line water quality instruments; and, determining detectability of specified contaminant concentrations in the bench-scale distribution system. Results indicate that the seven chemical contaminants can be detected at relatively low concentrations with routine monitoring. Some of the seven chemical contaminants can be detected below a concentration that will cause significant health impacts. Includes 11 references, tables, figures.