Develop and test participatory and integrated methodology for water tratement (combination of SODIS and in-situ chlorination with WATA devices) and improved hygiene eduaction in 110 schools. A particular focus placed on schools because they are a key environment for social marketing. With their enormous potential to raise awareness and influence the future generation, they play an important role in bringing about behavioural changes and promoting better health. Strategy based on 4 pillars: education, infrastructure, application and transferring the knowledge from school to community. 38’128 beneficiaries in 30 schools in Kenya 10’369 beneficiaries in 40 schools in Bolivia 7’500 beneficiaries in 40 schools in Haiti. Visit www.sodis.ch for more infos.