SODIS is a simple and inexpensive method of purifying water using solar light.  SODIS revolutionizes current conceptions of waste streams and resources.  In many places, pure water comes at the expense of firewood or gas for boiling or the cost and danger of using concentrated chlorine. SODIS is an innovation in water disinfection-- with plastic bottles and sunlight, even a child can safely purify water.

SODIS can be broken into the following steps:

During solar exposure, the combined effects of heat and ultraviolet radiation disinfect the water.  SODIS has been researched extensively, and is among the WHO's recommended methods of purifying water.

SODIS has been used extensively in the developing world and could be easily implemented in disaster relief situations.