Today, 2.4 billion people still live without access to improved sanitation; about one billion people defecate in the open; and more than 640,000 people lack improved drinking water sources.
With the adoption of the Sustainable Development Goals on water and sanitation (SDG 6 ), countries of the world committed themselves to change this situation by achieving universal access to safe water and sanitation while addressing issues of water quality and scarcity to balance the needs of households, agriculture, industry, energy, and the environment over the next 15 years.
Recent estimates by the World Bank’s Water and Sanitation Program (WSP)  indicate that the present value of the additional investment in the water and sanitation sector alone needed through 2030 will exceed US$1.7 trillion. Existing funding falls far short of this amount; .
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