这里用于评估长期室内节水计划有效性的替代方法提供了对年平均节水量的合理估计。对污水流量的统计分析表明，线性多元回归模型是分析污水流量的有效方法。随着更多的节水工作的开展，对这些项目的分析可以提供有关其持续有效性的宝贵信息。分析表明，1986年至1990年圣何塞市实施的节水项目最终导致流入水污染控制厂的废水量减少了约5 MGD。 使用这种方法，可以根据废水流量减少带来的有形/无形效益，对节水项目进行绩效评估。此外，可以对未来实施的节水项目进行监测，以评估其对废水流量的影响。

The alternative methodology applied here for evaluating the effectiveness of long-term indoor water conservation programs provides reasonable estimates of the annual average water use savings. The statistical analysis of wastewater flow indicated that a linear multiple regression model is a valid methodology for analyzing wastewater flow. As additional water conservation efforts are made, analysis of these programs can provide valuable information regarding their continue effectiveness. The analysis indicated the water conservation programs implemented in the city of San Jose from 1986 to 1990 have culminated in a reduction of wastewater flows to the water pollution control plant by approximately 5 MGD. Using this approach, performance evaluations of water conservation programs can be done in terms of the tangible/intangible benefits resulting from reduced wastewater flows. In addition, water conservation programs implemented in the future can be monitored for the purposes of evaluating their impact on wastewater flows.