Clean water and sanitation in developing areas lacking conventional power.

Progress in providing clean water and sanitation throughout the developing world has been steady and encouraging, even though UN Millennium Development Goals will not be completely met. A number of important lessons have been learned along the way with respect to point-of-use water treatment and sanitation devices that are appropriate for deployment in remote areas where power and clean water are not available. Here, prominent point-of-use treatment systems are compared in terms of disinfection capability, durability and cost, and lessons learned regarding the provision of improved sanitation are reviewed.