本文概述了地铁供水服务（MWS）的水资源审计 IWA/AWWA方法。第一次审计是由水系统公司进行的 优化（WSO），涵盖2001年7月至2002年6月期间。这个 最近完成的第二次审计所涉期间为2002年7月至2002年6月 2003年，由于缺乏数据和/或数据不足，第一次审计的置信限非常大 对一些数据缺乏信心。该部门从第一次审计中学到了很多 第二次审计的数据更加准确和简洁。因此 信心限制要严格得多。根据第一次审计的结果，绩效 制定了目标，确定并开始了实现这些目标的计划。包括桌子。

This paper gives an overview of Metro Water Services (MWS) water audits using the IWA / AWWA methodology. The first audit was done by Water Systems Optimization (WSO) and covered the period from July 2001 through June 2002. The second audit that was recently completed covered the period from July 2002 through June 2003. The first audit had some very large confidence limits due to lack of data and / or a lack of confidence in some of the data. The department learned a lot from the first audit and the data for the second audit was much more accurate and concise. Consequently, the confidence limits were much tighter. Based on the results of the first audit, performance targets were set and a plan for meeting those targets was identified and begun. Includes tables.