1974年《安全饮用水法》的一个主要特点是，在颁布法规之前，必须考虑供水和供水的经济性和成本。水务管理人员可用于协助这些评估的工具有限。本文描述了空间成本计算系统的开发和应用，该系统将允许管理者确定与向消费者输送水相关的实际成本。讨论了成本分类、月度和年度输入数据、系统维护和数据流。 包括7个参考文献、表格、图表。

A primary feature of the Safe Drinking Water Act of 1974 is that the economics and cost of water supply and delivery must be considered before regulations are promulgated. The tools available to water utility managers that will assist in these assessments are limited. This paper describes the development and application of a spatial costing system that will allow the manager to determine the real costs associated with delivering water to the consumer. Cost classification, monthly and annual input data, system maintenance, and data flow are discussed. Includes 7 references, tables, figures.