The Harvard Gazette profiles the scaling up of IPA's Chlorine Dispensers for Safe Water. An excerpt:
A year and a half ago, a pilot program to give rural families affordable water purification had issued 40 dispensers that served 6,000 people in Kenyan villages. Today, more than 400,000 people in Kenya and other countries have access to clean water based on this method.
The approach, which uses an inexpensive chlorine solution and a plastic dispenser that was custom made to distribute doses at communal water sources, was developed by Michael Kremer, Gates Professor of Developing Societies in the Faculty of Arts and Sciences' Economics Department and a faculty member at the Harvard Kennedy School, Professor of Economics Sendhil Mullainathan, and colleagues at the University of California at Berkeley, the National Bureau of Economic Research, Emory University, and the Bill & Melinda Gates Foundation.
Based on the initial study that concluded a year and a half ago, the Gates Foundation supported the nonprofit group Innovations for Poverty Action to scale up the approach, with Daniele Lantagne, a two-year Georgio Ruffolo Research Fellow in Harvard Kennedy School's Sustainability Science Program, providing technical assistance. Several local governments in Kenya, along with the ministries of Water, Public Health and Sanitation, and Education, and the nonprofit One Acre Fund have all invested in the approach.