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Table 2

Water supply systems sustainability index rating

ScoreIndicationRemarks
0–25 Unsustainable Water supply system is not reliable irrespective of seasonal influences, difficult accessibility (water supply system far from point of use), difficulty in management, high construction and maintenance cost or purchase of water required, poor quality 
26–50 Averagely Sustainable Water supply system is only reliable during the rainy season, less difficult accessibility (water supply system is close but not within the building), difficulty in management, minimal construction and maintenance cost or purchase of water required, poor quality 
51–75 Sustainable Water supply system is reliable, ease of access (water supply system is within the house but not connected to the building plumbing system), ease of management, cost beyond construction is only maintenance-based, good quality 
76–100 Highly Sustainable Water supply system is reliable, ease of access (water supply system connected to the building), ease of management, cost beyond construction is only maintenance-based, good quality 
ScoreIndicationRemarks
0–25 Unsustainable Water supply system is not reliable irrespective of seasonal influences, difficult accessibility (water supply system far from point of use), difficulty in management, high construction and maintenance cost or purchase of water required, poor quality 
26–50 Averagely Sustainable Water supply system is only reliable during the rainy season, less difficult accessibility (water supply system is close but not within the building), difficulty in management, minimal construction and maintenance cost or purchase of water required, poor quality 
51–75 Sustainable Water supply system is reliable, ease of access (water supply system is within the house but not connected to the building plumbing system), ease of management, cost beyond construction is only maintenance-based, good quality 
76–100 Highly Sustainable Water supply system is reliable, ease of access (water supply system connected to the building), ease of management, cost beyond construction is only maintenance-based, good quality 
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