More than one billion people - 20 percent of the world's population - live without clean water and nearly three billion live without adequate sanitation services. As a result, more than five million people die from waterborne diseases like diarrhea, cholera, and typhoid each year. Children are the most vulnerable - 4,500 die every day because they do not have clean, safe drinking water. Without clean water and sanitation, public health cannot be achieved. As a result, we incorporate water and sanitation into our community-based programs so that public health is not only possible, but sustainable. We build wells, latrines, and large-scale water treatment and waste management systems so that communities, even in the world's most water-stressed areas, are no longer threatened by waterborne illness.