本文描述了一种双位点反应方案，该方案成功地模拟了几种天然水氯化生成氯仿和全氯化卤乙酸（HAAs），将原水中反应位点的浓度视为与A254成比例。优化的反应速率常数表明，在所有情况下，限速步骤都是第一个氯附着步骤。序列中不同反应的速率常数变化约五个数量级，但在不同测试水源中，给定步骤的速率常数仅变化约三倍。该模型目前正在扩展，以包括含有大量溴化物的水中消毒副产物的形成。包括7个参考文献、表格、图表。

This paper describes a two-site reaction scheme that successfully simulates formation of chloroform and all chlorinated haloacetic acids (HAAs) from chlorination of several natural waters, treating the concentration of reactive sites in the raw water as being proportional to A254. The optimized reaction rate constants suggest that the rate limiting step in all cases is the first chlorine attachment step. The rate constants for different reactions in the sequence vary by approximately five orders of magnitude, but the rate constants for a given step vary by only approximately a factor of three among the different water sources tested. The model is currently being expanded to include disinfection byproduct formation in waters containing significant amounts of bromide. Includes 7 references, tables, figures.