根据《安全饮用水法》的要求，对28个供水系统的1400名客户进行了两阶段电话调查，询问他们对违反水质标准的公开通知的回忆。约40.6%的受访者记得某种类型的通知。只有20%的受访者愿意花钱改善水质，因为大多数受访者已经对他们的饮用水感到满意。包括3个参考文献、图表。

A two-stage telephone survey was conducted to question 1400 customers of 28 water systems about their recollections of public notification of water quality standards violations, which is required under the Safe Drinking Water Act. About 40.6 percent of those surveyed remembered some type of notification. Only 20 percent were willing to spend money to improve water quality, because most respondents were already satisfied with their water. Includes 3 references, figures.