根据消毒剂/消毒副产品规定，南加州大都会水区（大都会）启动了一项THM行动计划，以主动确定处理策略，使THM和其他DBP符合要求，同时保持对味道和气味化合物及微生物的控制。Metropolitan耗资2600万美元的行动计划包括凝血研究、颗粒活性炭研究、一项为期2年的氧化剂中试规模研究，评估臭氧和过氧化物，以及一个为期5年的氧化（臭氧/过氧化物）示范项目。 本文的重点是初步示范项目的结果。关键问题包括:测试工厂运行的稳定性以及液态臭氧残留采样和分析的可靠性；计算不同臭氧剂量和气体流量条件下的CT消毒剂浓度C（mg/L），x接触时间T（min）；收集国家项目用水的溴酸盐发生数据。

In anticipation of the Disinfectants/Disinfection Byproducts Rule, the Metropolitan Water District of South California (Metropolitan) initiated a THM action plan to pro-actively identify treatment strategies that would allow compliance for THMs and other DBPs, while maintaining control of taste-and-odor compounds and microorganisms. Metropolitan's $26 million action plan includes coagulation studies, granular activated carbon studies, a 2-year oxidant pilot-scale study evaluating ozone and PEROXONE, and a 5-year oxidation (ozone/PEROXONE) demonstration project. The focus of this paper is on the initial demonstration project ozone contactor results. Critical issues involve: testing the stability of plant operations and the reliability of liquid ozone residual sampling and analysis; calculating the CT-disinfectant concentration, C (mg/L), x contact time, T (min)-for various conditions of ozone dosage and gas flow; and collecting bromate occurrence data for State project water.