历史记录用于描述开放式配水库中三卤甲烷（THM）和总有机卤化物（TOX）的水质，并探索藻类、氯气使用和水库旁路运行对THM形成的影响。银湖水库的THM和TOX产量显著增加。这一增长归因于露天水库中藻类的生长，以及使用氯来控制这些生长。绕过开放式蓄水池周围的净化水可显著减少蓄水池出口处THM的形成40%。旁通操作的范围取决于系统的液压特性。 包括9个参考文献、表格、图表。

Historical records were used to characterize the quality of water in an open distribution reservoir with respect to trihalomethanes (THMs) and total organic halides (TOX) and to explore the effect of algae, chlorine use, and reservoir bypass operation on THM formation. Significant increases in THM and TOX production occurred in the Silver Lake Reservoir. The increase was attributed to the growth of algae in the open reservoir and the application of chlorine to control these growths. Bypassing treated water around the open reservoir markedly reduced THM formation at the reservoir outlet by 40 percent. The extent of bypass operation depends on the hydraulic characteristics of the system. Includes 9 references, table, figures.