Urban

As suggested, rural water system should be designed around the need for safeguarding the quality of the natural water selected. The use of chemical to assist the process would not be feasible under rural conditions as it would require expenses and skills which are usually beyond local resources. Plain sedimentation in natural or impounded reservoirs is useful for the removal of gross turbidity and for a reduction in bacteria, especially pathogenic bacteria. It can be effective either alone or in combination with slow sand filtration or chlorination.