A substantial quantity of good information is required prior to the development of any water source, but it's existence in computer files and government reports is simply not useful unless it is put to use through a comprehensive planning process. This must include at least:

• the development of clear objectives;
• evaluation of available resources;
• identification of optional ways forward, and;
• comparison of the technical, economic, and environmental aspects of each identified option.

At the first and third of these steps it has become essential to seek the participation of the communities to be served. The second and the fourth require the expertise of professional engineers and planners.