The case study titled “CDD-WATSAN Project in Ganjam and Kandhamal – An Assessment 1991-96” has been developed and published in 2004 by United Nations Children's Fund (UNICEF). This paper discusses the Control of Diarrhoea Diseases-Water Sanitation (CDD-WATSAN) project Ganjam and Kandhamal districts in Orissa from 1996 to 1999. A comparison of final impact assessments of the 2 districts is presented in terms of changes in the access to and use of water and sanitary facilities within households and primary schools, and improved hygiene practices and diarrhoea management at home.