美国环境保护局的接触时间表基于在缓冲无需水条件下获得的存活数据。然而，德雷塞尔大学进行的消毒实验数据表明，水源的选择会影响灭活程度。复杂的消毒动力学模型和统计测试用于分析这些差异的来源。本文证明，特定水源水的质量是预测消毒效果的重要因素。包括18个参考文献、表格、图表。

The contact-time tables of the US Environmental Protection Agency are based on survival data obtained in buffered demand-free water. However, disinfection data from experiments conducted at Drexel University showed that the choice of source water influences the degree of inactivation. Sophisticated disinfection kinetic models and statistical tests are used to analyze the sources of these discrepancies. This article demonstrates that the quality of a particular source water is a significant factor in predicting disinfection effectiveness. Includes 18 references, tables, figures.