1979年，马修斯湖（Lake Mathews）是南加州大都会水区的一个蓄水池，每年都会出现一次味道和气味的循环。为了建立一个能够检测即将发生的味道和气味事件的预警系统，公用事业公司开发了一种方法，用于识别困扰水库的泥土霉味，确定导致问题的因素，研究因素在水库中的栖息地和分布，并探索可用于控制因素的各种处理方法。预警系统有效地提供了提前通知，包括在七个预先选定的地点定期对水库进行采样。有了这个系统，公用事业公司能够将年度味觉和气味发作的严重程度和程度降到最低。到目前为止，硫酸铜块的应用已被证明是最经济的，但存在一些担忧，即藻类可能会对该处理产生耐药性。 包括19个参考文献、表格、图表。

In 1979, an annual cycle of taste and odor episodes began in Lake Mathews, a storage reservoir that is part of The Metropolitan Water District of Southern California. In order to set up an early warning system that would detect impending taste and odor episodes, the utility developed a methodology for identifying the earthy-musty odors that plagued the reservoir, identified the agents causing the problems, studied the agents' habitat and distribution in the reservoir, and explored the various treatment methods available for controlling the agents. Advance notice has effectively been provided by the early warning system, which includes regular sampling of the reservoir in seven preselected locations. With this system, the utility has been able to minimize the severity and extent of annual taste and odor episodes. Thus far, application of chunk copper sulfate has proved to be most economical, but some concern exists that the algae may develop a resistance to the treatment. Includes 19 references, table, figures.