Wells, toilets, water towers, and pipelines. Even the well-designed elements of Rotary water, sanitation, and hygiene (WASH) projects can fail if people don’t use them. There are many reasons people might hesitate to use a communal toilet. It’s important to understand the reasons before you build the toilet. Learn about behavior change and its role in WASH programs, how it’s connected with culture and community values, and how to incorporate it into your WASH projects and measure the outcomes. Moderator: F. Ronald Denham, Water and Sanitation Rotarian Action Group Chair Emeritus, Rotary Club of Toronto Eglinton, Ontario, Canada