This powerpoint presentation begins by providing a brief overview of backflow and a West Virginia (WV)water system with a backflow event. The presentation explores whether modeling could have predicted backflow susceptibility, and the summary concludes that: in the WV system, backflow was detected from meter readings; readings logged over one-month interval, and modeling indicates more than one event was responsible for the backflow occurrences, modeling is a useful tool for assessing vulnerability; can determine the effect of routine operations on system vulnerability, and can determine appropriate mitigation strategies for a system. Includes figures.