The World Health Organization estimates 1.8 million people die each year from diarrhea; 88 percent of those deaths are caused by unsafe water supply, sanitation and hygiene and are concentrated among children in developing countries. After returning from Uganda, the Parrishes knew they wanted to help in some way. "You're immersed in a community and understand the depth and breadth of a problem, then you return to our wonderful life here and say, 'What now? What is there we can do to help out?'" Diane Parrish says. "We thought the WAPI would be a good one.