对来自六个州的12个全尺寸处理厂的数据进行了评估，以确定三卤甲烷（THM）和总有机卤化物（TOX）形成之间的相关性程度。在接近中性pH条件下进行常规处理的地表水中，发现TOX与TTHM的比例约为3.4:1。以氯当量为基础，TTHMs约占TOX浓度的26%。TOX与TTHM的比值与原水中在pH值为7的氯接触七天后发现的TOX生成电位与THM生成电位的比值密切相关。在碱性pH值下发生沉淀软化的水中，以氯当量为基础的TTHMs占TOX浓度的39%。包括18个参考文献、表格、图表。

Data obtained from 12 full-scale treatment plants in six states were evaluated to determine the extent to which correlations exist between trihalomethane (THM) and total organic halide (TOX) formation. Surface waters that had undergone conventional treatment at near-neutral pH were found to contain a TOX-to-TTHM ratio of approximately 3.4:1. On a chlorine-equivalent basis, the TTHMs comprised approximately 26 percent of the TOX concentration. This TOX-to-TTHM ratio corresponded closely to the ratio of TOX formation potential to THM formation potential found in raw waters after a chlorine contact time of seven days at pH 7. In waters subjected to precipitative softening at alkaline pH values, the TTHMs, on a chlorine-equivalent basis, comprised 39 percent of the TOX concentration. Includes 18 references, tables, figures.