对洛杉矶和加利福尼亚州圣迭戈每周用水量的分析表明，这两个城市的干旱应对计划在1991年实现了22%到25%的减少，尽管它们各自的保护方法有所不同。大部分减少是在1991年夏季实现的，但即使是在深秋潮湿期，用水量仍然大大低于在没有保护的情况下预期的水平。建议更多地关注遵守用水限制的实际水平，而不是自愿保护与强制性保护的名义差异。 包括29个参考文献、表格和图表。

Analysis of weekly water use in Los Angeles and San Diego, California, indicates that drought response programs in both cities achieved 22-25 percent reductions in 1991, despite differences in their respective approaches to conservation. Most of the reductions were achieved during the summer of 1991, but water use even during a late fall wet period continued to be significantly below levels that would have been expected without conservation. It is suggested that more attention be given to actual levels of compliance with water use restrictions than to nominal differences of voluntary versus mandatory conservation. Includes 29 references, tables, figures.