Agua del Pueblo (AdP) was founded in 1972 in San Lucas Tolimán, on the shore of Lake Atitlán, by a group of idealistic young Americans and Guatemalans working with the Community Development program of the San Lucas Mission. We "learned by doing," living and working in the first communities we served. Eventually, Agua del Pueblo was incorporated as a non-profit Guatemalan organization with entirely Guatemalan leadership and staff, and the sister organization, The People’s Consultants, was created in the USA. Since then, AdP has helped over 1,000 rural communities, comprising more than 500,000 people, gain access to safe drinking water, improved sanitation, and community development. AdP is now the world’s oldest non-profit organization focused on water, sanitation, and development! Along the way, we have pioneered innovative approaches that have inspired many other organizations, including The World Bank, the U.S. Agency for International Development, and numerous non-profits.