Development of Distribution System Water Quality Optimization Plans

The purpose of this study was to develop a comprehensive list of best management practices for maintaining and improving distribution system water quality. Three utilities in the United States and Canada participated by conducting system-wide audits of their internal practices and procedures, and developing and implementing work plans to address issues identified during the audits. Procedures were developed for water quality issues such as evaluating biofilm formation, the need for unidirectional flushing, the occurrence and control of pressure transients, the impact of dead-ends on water quality, storage facility operation and management, and the impact of piping materials on water quality.