AWWA ACE65326

This powerpoint presentation begins by listing the causes of contaminant intrusion as: Water Main Breaks and Water Main Leaks; Backflow Control Valve Failures; Cross Connections; and, Terrorism. The study approach included: finding strategic locations for sensors; and, developing a practical algorithm to identify contaminant intrusion. Major approaches adopted in previous work are listed, along with a data mining approach, advantage of data mining method, procedure to establish a database, SODA (Screening Out Data-mining Algorithm); and, approach developed in this study - Maximum Likelihood Method.