1985年期间，费城发生了两次不可接受的味道和气味，与水中土工蛋白的水平相对应，远高于20纳克/升或更低的背景水平。其中一个事件的源头被发现是Schuylkill河中的一个局部藻类床。现有的味觉和气味控制程序利用仪器和感官分析，主要负责有效管理这些事件。水力策略用于减少处理厂的土工蛋白摄入量，处理列中的粉末活性炭进一步降低了土工蛋白水平。将处理后的水与分配系统中的其他成品水稀释，也可以减少geosmin对费城水味道和气味的影响。 包括20个参考文献、表格和图表。

Two episodes of unacceptable tastes and odors, which corresponded with levels of geosmin in the water that were much higher than the background level of 20 ng/L or less, occurred in Philadelphia during 1985. The source of one episode was found to be a localized bed of algae in the Schuylkill River. An existing taste and odor control program, which utilizes instrumental and sensory analyses, was largely responsible for the effective management of the episodes. Hydraulic strategies were used to reduce the treatment plant's intake of geosmin, and powdered activated carbon in the treatment train further reduced the geosmin level. Dilution of this treated water with other finished waters in the distribution system also diminished the impact of geosmin on the taste and odor of Philadelphia's water. Includes 20 references, tables, figures.