水处理设施发现，生产安全饮用水越来越具有挑战性 以合理的价格购买水。在接下来的20年里，公用事业公司的支出预计将至少增加一倍 在基础设施和水处理方面投入了大量资金。偶尔，美国环境保护局（USEPA）的新规定 需要改变水处理，这实际上会加速基础设施的退化。对于 例如，人们越来越担心凝固pHs的降低和凝固剂剂量的增加 根据新的强化凝血规则的要求，饮用水可能会显著降解 水处理厂基础设施。 本文详细介绍了美国水务工程协会的一些研究结果 研究基金会（AWARF）资助的项目旨在研究这些问题。从非常 很少有人对第一步即混凝导致的基础设施退化进行研究 是在综合文献综述中收集其他行业的见解。第二，a 对美国的凝血公用设施进行了调查，以评估使用 增强凝血功能。最后，以北京大都会水区为例进行了案例研究 南加州。包括150个参考文献、表格和图表。

Water treatment utilities are finding it increasingly challenging to produce safe drinking water at a reasonable cost. Over the next 20 years, utilities are expected to spend at least twice as much money on infrastructure as on water treatment. Occasionally, new US Environmental Protection Agency (USEPA) regulations require changes to water treatment that can actually accelerate infrastructure degradation. For example, there is growing concern that the lowered coagulation pHs and higher coagulant doses required by the new Enhanced Coagulation Rule may lead to significant degradation of drinking water treatment plant infrastructure. This paper details some of the results from an American Waters Works Association Research Foundation (AWWARF) funded project designed to examine these issues. Since very little research has been conducted into infrastructure degradation from coagulation, the first step was to compile insights from other industries in a comprehensive literature review. Second, a survey of coagulation utilities in the United States was conducted to assess utility experiences with enhanced coagulation. Finally, a case study is presented from the Metropolitan Water District of Southern California. Includes 150 references, tables, figures.