近年来，人们越来越担心这个问题 水处理化学品的质量和可靠性。 这些不确定因素一直存在 受到重大公众关注的污染事件 请注意，它们仍然是新出现的污染 问题出现了。本文描述了一个全面的 全国水中微量污染物调查 处理化学品。在这项研究开始之前 目前尚不清楚是否存在相关问题 由于水处理化学品中含有污染物 广泛的或仅限于孤立事件的。这个项目 旨在使用 美国和美国的最佳可用信息 除此之外，还需要为以下方面制定切实可行的建议: 公用事业公司和整个行业如何识别， 限制和防止治疗污染 改善工厂运营、降低处理成本的化学品 降低成本，保护公众健康。 一般来说，微量污染物没有普遍存在的问题 在美国发现了水处理化学品 在本研究中，但当事故发生时 最常见的问题与交通有关， 通常是由于清洗不当或 维护运输车辆和运输软管。治疗 发现化学品质量高，并且 微量污染物成分低于指示值 在之前的几项可用研究中。 这项研究表明，污染事件可能 当公用事业公司开发和实施 来料检验和评估计划 在他们的设施里运送化学品。这些节目 导致更多的机会来识别、拒绝、， 并为受污染的货物安排替换装运 在设施使用前对化学品进行处理 在它们影响成品水或残余物之前 质量包括20个参考文献、表格和图表。

Concern has been growing in recent years about the quality and reliability of water treatment chemicals. These uncertainties have been perpetuated by contamination incidents that received significant public attention, and they continue as emerging contamination issues arise. This article describes a comprehensive national investigation of trace contaminants in water treatment chemicals. Before this research was conducted, it was not known if problems associated with contaminants in water treatment chemicals were widespread or limited to isolated events. This project was intended to answer this basic question using the best available information across the United States and beyond and to develop practical recommendations for utilities and the industry as a whole about how to identify, limit, and prevent contamination of treatment chemicals to improve plant operations, lower treatment costs, and protect public health. In general, no pervasive problems with trace contaminants in US water treatment chemicals were found in this research, but when incidents do occur, the most commonly identified problems were transport-related, typically the result of improperly cleaned or maintained delivery vehicles and transfer hoses. Treatment chemicals were found to be of high quality, and trace contaminant composition was lower than indicated in the few previous studies that are available. This study showed that contamination incidents may be largely averted when utilities develop and implement inspection and evaluation programs for incoming chemical deliveries at their facilities. These programs result in more opportunities to identify, reject, and arrange replacement shipment for contaminated treatment chemicals before they are used at a facility and before they can affect finished water or residuals quality. Includes 20 references, tables, figures.