SODIS (short for Solar Water Disinfection) started as an initiative of Eawag, the Swiss Federal Institute of Aquatic Sciences and Technology. Eawag supports the improvement and spread of the SODIS method through research in microbiology, health, educational strategies and PET bottles. An enthusiastic team in Switzerland provides technical and project management support for SODIS projects in 25 countries.
In 2011, Eawag und the Swiss NGO Helvetas Swiss Intercooperation entered into a partnership with the goal to jointly promote the SODIS method worldwide. In the context of this partnership, the projects supporting the promotion of household water treatment, including the SODIS method, are being carried out by Helvetas Swiss Intercooperation.