四种低溴水在三个pH值（5.5、7.0和8.0）下分别凝结，然后进行模拟分配系统（SDS）氯化试验。本研究的目的是确定总有机碳（TOC）或UV-254吸光度是否可以用作氯化后形成的三卤甲烷（THM）和卤乙酸（HAA）浓度的指标。结果表明，随着混凝pH值的降低，TOC和UV-254的去除率始终增加，但去除程度因水体而异。 在pH值为5.5的条件下凝固后，SDSTHM和SDSHAA5的形成量达到最大程度的减少。UV-254被证明是比TOC更好的氯化副产物生成替代物。应评估相关性对溴含量较高且氯化pH值不同的水的适用性。包括28个参考文献、表格和图表。

Each of four low-bromide waters was coagulated at three pH values (5.5, 7.0, and 8.0), and then simulated distribution system (SDS) chlorination tests were performed. The object of the study was to determine whether total organic carbon (TOC) or UV-254 absorbance can be employed as an indicator of the trihalomethane (THM) and haloacetic acid (HAA) concentrations formed upon chlorination. Results showed that removal of TOC and UV-254 always increased with decreasing coagulation pH, but the extent of removal varied with the different waters. Maximum reduction of SDSTHM and SDSHAA5 formation was achieved after coagulation at pH 5.5. UV-254 proved to be a better surrogate for chlorinated byproduct formation than TOC. The applicability of the correlations to waters with higher bromide levels and different chlorination pH values should be evaluated. Includes 28 references, tables, figures.