本文介绍了哥伦比亚特区污水处理和管理局（WASA）通过节水和及时减少废水流量，将其流入Blue Plains废水处理厂的废水流量减少20 mgd的经验。选择了几位全国知名的顾问来制定节水和废水流量减少计划，其中包括以下目标:加强对客户的水和废水服务；保护环境；而且，保持收入中性。WASA选择遵守美国环境保护署（US Environmental Protection Agency）的水资源保护计划指导方针，领导全国，成为世界级组织。WASA对使用这些指南的逐步方法进行了概述。

This paper describes the experiences of the District of Columbia Water Sewer and Authority (WASA) in reducing its wastewater flow to the Blue Plains Wastewater Treatment Plant by 20 mgd through water conservation and wastewater flow reduction in a timely manner. Several nationally known consultants were selected to prepare a water conservation and wastewater flow reduction program, which included the objectives of: enhancing water and wastewater services to customers; protecting the environment; and, be revenue neutral. WASA chose to comply with the US Environmental Protection Agency's water conservation plan guidelines to lead the nation and become a worldclass organization. WASA's step-by-step approach to using these guidelines is outlined.