本文重点介绍了四个商业节水项目 在过去的五年里，每天为供应系统节省/增加了400万加仑 以远低于新供应源避免成本的水平化成本。这些 四个项目都产生了长期、可靠的节水效果:商业用水 厕所回扣计划；水智能技术；节水灌溉； 水的再利用。每个项目的努力都有其独特之处。项目结果 讨论了它们是如何实现的，包括统计信息，以及 从公用事业和客户的角度考虑成本和效益。包括表格、数字。

This paper focuses on four commercial water conservation programs that, over the past five years, have saved/added 4 million gallons per day to the supply system at a levelized cost well below the avoided cost of new supply sources. These four programs have each produced long term, reliable water savings: Commercial Toilet Rebate Program; Water Smart Technology; Water Efficient Irrigation; and, Water Reuse. Each program effort is unique in it's own way. Program results and how they were achieved are discussed including statistical information, and the cost and benefit from both the utility and customers perspectives. Includes tables, figures.