AWWA ACE62991

This slide presentation outlines information on the International Water Audit Method. Advantages of the method are listed along with the IWA/AWWA Water Balance Format. Four components of managing real losses are discussed and include: improved response time for leak repair; pressure management; active leakage control; and, improved system maintenance, replacement, and rehabilitation. Four components of managing apparent losses are discussed and include: unauthorized consumption theft and illegal consumption; meter accuracy error, meters do not register actual volumes passing; data transfer errors between meter and archives, poor customer accountability; and, data analysis, errors between archived data and data used for billing/water balance. Guidelines for Setting a Target Level Infrastructure Leakage Index are given, along with AWWA Water Loss Control Committee recommendations that include: the IWA methodology for the Water Audit and Performance Indicators is recognized as the current best practice method for quantitatively monitoring water consumption and water loss in drinking water systems; water suppliers should make use of the full array of Performance Indicators included in the international methodology; the term "Unaccounted-for" Water, having no consistent meaning, be dropped from use in all industry references; and, the four component approaches to controlling Real Losses and Apparent Losses be utilized as leading practices to economically control these losses. Includes tables.