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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

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