本文讨论了科罗拉多州Castle Rock镇双配水系统的规划和实施，为社区中大多数新的住宅和商业地产提供计量的不可饮用水和饮用水。该系统旨在保护深层非污染地下水供应，同时提供更有效的三级处理废水处理方法。包括3个参考文献、图表。

This article discusses the planning and implementation of a dual distribution system by the town of Castle Rock, Colorado, to provide metered nonpotable as well as potable water to most new residential and business properties in the community. The system is designed to conserve a deep, nontributary underground water supply while providing a more effective means of disposing of tertiary treated wastewater. Includes 3 references, figures.