The purpose of this survey was to undertake an impact assessment of the WASH in schools’ component of the project “Strengthening citizen’s influence on WASH in the newly devolved governance system in Mombasa and Taita Taveta counties in Kenya”, funded by the Danish Peoples Aid through Maji na Ufanisi. The WASH in schools’ component aims at improving access to clean water and sanitation facilities and promote lifelong health for children in schools.