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close this bookA Guide to the Development of on-site Sanitation (WHO; 1992; 246 pages)
View the documentPreface
open this folder and view contentsPart I. Foundations of sanitary practice
open this folder and view contentsPart II. Detailed design, construction, operation and maintenance
close this folderPart III. Planning and development of on-site sanitation projects
close this folderChapter 9. Planning
View the documentThe demand for sanitation
View the documentProject definition
View the documentBackground information
View the documentComparison and selection of systems
open this folder and view contentsChapter 10. Institutional, economic and financial factors
open this folder and view contentsChapter 11. Development
View the documentReferences
View the documentSelected further reading
View the documentGlossary of terms used in this book
View the documentAnnex 1. Reuse of excreta
View the documentAnnex 2. Sullage
View the documentAnnex 3. Reviewers
View the documentSelected WHO publications of related interest
View the documentBack Cover

Project definition


Early in the planning process the extent of the programme or project must be assessed. This involves making an estimate of the number of people or households who will be covered. A house-by-house survey may be undertaken, or the necessary information obtained from health staff, government departments or local leaders.

Priority areas

A list is drawn up comparing the needs of different areas. Priority should be given to people with especially poor facilities for excreta disposal and areas with a high incidence of diseases associated with poor sanitation. Areas with a high population density or congested housing may justify special attention. However, houses intended for temporary occupation may warrant less attention than permanent buildings.

Other factors that influence the selection of priority areas are the interest of the local communities in sanitation improvements and their record of participation in other projects. Ability and willingness to contribute financially may be other criteria for the selection of priority areas. Projects generally depend on a financial contribution from householders; occasionally priority is given to people most likely to pay or those willing to try new ideas. For projects that are externally funded, the poorest people may be selected for preferential treatment, on the assumption that better-off families should pay for their own latrines.

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