20世纪70年代的干旱造成的水资源短缺，加上能源、化学品和水厂扩建成本的不断上升，迫使水务公司的管理人员使用泄漏检测程序来帮助控制与下落不明的水相关的损失。

Water shortages caused by drought in the 1970s plus the escalating costs of energy, chemicals, and water plant expansion compel managers of water utilities to use leak detection programs to help control losses associated with unaccounted-for water.