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Wastewater, Health and Human well being Investing in water supply and sanitation


Economic return for water and sanitation investments for two different scenarios


US Dollars return for each dollar invested


Central and Eastern Europe


Eastern Mediterranean Africa


Latin America and Caribbeans


Atlantic Ocean


Indian Ocean


Scenario A Scenario B


1 000


WHO scenarios for 2015 A


B


Water Source and sanitation for the Millennium Development Goals


Regulated piped water source and sewer connection


Diarrhoea cases averted per year reaching: Thousands


Scenario A Scenario B


Mortality rate for WHO sanitary regions


430 130 1


Child


High Low


Low High Very high Adult


Source: Hutton, G., et al., Global cost-benefit analysis of water supply and sanitation interventions, Journal of Water and Health, 2007.


Figure 9: Investment to improve basic access to a safe water source and sanitation (WHO scenario A) can have a significant return with the largest impact on health in particular averting diarrhoea cases and time saved (increasing productivity). Urbanized areas provide a large proportion of GDP, therefore the future development of developing countries is dependent on the productivity of growing urban areas.


South East Asia


Western Pacific


Pacific Ocean


45 40 35 30 25 20 15 10 5 0


29


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