- Mid 1990's: Dr. Lloyd Connelly identifies a need for a low-cost and simple household treatment method. Based on the principle of water disinfection with ultraviolet light, Dr. Connelly creates the UV-Tube.
- February, 2000: The UV-Tube wins the World Bank Development Marketplace competition.
- 2000-2001: Design work and laboratory testing continues based on stainless-steel lined PVC version of the UV-Tube.
- Summer/fall 2001: Field study of stainless lined PVC UV-Tube (el tUVo) conducted in Pátzcuaro, Mexico in collaboration with Interdisciplinary Rural and Appropriate Technology Group (GIRA).
- Summer 2002: UV-Tube Project receives grant from the National Collegiate Inventors and Innovators Alliance (NCIIA). Grant is used to fund testing of concrete and pottery UV-Tube designs and for the full scale field trial of the stainless steel lined PVC design.
- January 2003: UV-Tube Project and Mexican Institute of Water Technology (IMTA) form partnership.
- 2003: IMTA conducts pilot studies of 18 families in two communities in the state of Morelos, Mexico. AquaTuvo, a new version of the UV-Tube using a stainless steel cylinder instead of PVC, developed.
- July 2004: Ferrocement prototype built and installed in the Center for Ideas and Technology Exchange (Sant Teknoloji: Bwase Lide), Borgne, Haiti.
- Summer 2005: In partnership with Sri Lankan NGO Sarvodaya, UV-Tube team builds 11 ferrocement systems in Sri Lanka. Each device is capable of serving 25 families.