在扩容和节约之间找到一个适当的平衡可以导致需求量的减少，从而为水利事业带来好处。一个好处是减少了操作和维护费用，因为在水的获取、处理和处置中使用的泵送能量和化学品更少。另一个好处是资本设施的延期或缩减。将当前供应与预计需求进行比较，有助于确定未来需求管理或增加供应的需求。除成本因素外，还应考虑包括环境影响在内的非货币因素。 在本文中，来自德克萨斯州、加利福尼亚州、爱达荷州和新西兰的案例研究说明了这种平衡过程。包括9个参考文献、表格、图表。

Finding an appropriate balance between capacity expansion and conservation can result in quantifiably reduced demand, which yields benefits for water utilities. One benefit is reduction in operation and maintenance expenses, because less pumping energy and fewer chemicals are used in the acquisition, treatment, and disposal of water. Another benefit is the deferral or downsizing of capital facilities. Comparing current supply with projected demand aids in the identification of future needs for demand management or increased supply. In addition to cost factors, nonmonetary factors, including environmental effects, should be considered. In this article, case studies from Texas, California, Idaho, and New Zealand illustrate this balancing process. Includes 9 references, tables, figures.