Half the hospital beds in developing countries are filled with people suffering from diseases caused by poor water, sanitation and hygiene.
(UNDP Human Development Report, 2006 http://hdr.undp.org/en/media/HDR06-complete.pdf  page 45)

Lack of water, sanitation and hygiene costs Sub-Saharan African countries more in lost GDP than the entire continent gets in development aid.
(Using percentage estimate from UNDP: Human Development Report, 2006)

The average person in the UK uses 150 litres of water a day. In Australia it's around 500 litres and in the USA, over 570 litres.
(UNDP: Human Development Report, 2006: page 34)

Water in Accra, Ghana, costs three times as much as in New York.
(UNDP, 2006)

Women in Africa and Asia often carry water on their heads weighing 20kg, the same as the average UK airport luggage allowance
(UNDP: Human Development Report, 2006: page 34-35)