About one billion people worldwide lack access to safe drinking water, and this number is increasing. UV Waterworks is an ultraviolet water disinfection device designed specifically for the purpose of providing safe drinking water to communities in the developing world. The device renders harmless ("deactivates") the bacterial and viral content of surface water or groundwater, improving the chance for infants to avoid the diarrheal diseases that, according to UNICEF studies, killed 3.8 million children under age 5 in 1993.