在这篇文章中，作者报告了强化混凝去除两个自然水源——科罗拉多河水（CRW）和加利福尼亚州项目用水（SPW）中颗粒物和三卤甲烷（THM）前体的中试研究结果。南加州大都会水区（MWDSC）使用这些水源为南加州六个县的近1500万人提供服务。通过颗粒计数和测量颗粒大小分布、浊度、总有机碳、254 nm处的紫外线吸收率（UV254）和THM形成电位，对水源水和过滤废水的样品进行了检查。讨论了这些结果对当前和即将出台的颗粒物和消毒副产物（DBPs）相关法规的影响。包括31个参考文献、表格、图表。

In this article, the authors report results of a pilot-scale investigation of enhanced coagulation for the removal of particles and trihalomethane (THM) precursors from two natural water sources, Colorado River water (CRW) and California State Project water (SPW). These water sources are used by the Metropolitan Water District of Southern California (MWDSC) to serve nearly 15 million people in a six-county area of Southern California. Samples of both source water and filter effluent were examined by counting particles and measuring particle size distribution, turbidity, total organic carbon, ultraviolet light absorbance at 254 nm (UV254), and THM formation potential. The implications of the results for current and pending regulations pertaining to particles and disinfection by-products (DBPs) are discussed. Includes 31 references, tables, figures.