Key Facts

About 96% of all liquid freshwater on Earth is groundwater
Recent surveys1 on groundwater in Africa concluded that there is 100 times more water under the continent’s surface than on it
In India, a new tube well is sunk every six seconds on average

Photos: David Brazier, Akissa Bahri, Tom Van Cakenberghe
Gleick, P. H., 1996: Water resources. In Encyclopedia of Climate and Weather, ed. by S. H. Schneider, Oxford University Press, New York, vol. 2, pp.817-823.

Groundwater and Human Development: Challenges and Opportunities in Livelihoods and Environment
Tushaar Shah, International Water Management Institute

Environmental Research Letters Volume 7 Number 2,
A M MacDonald et al 2012  Quantitative maps of groundwater resources in Africa
A M MacDonald, H C Bonsor, B É Ó Dochartaigh and R G Taylor

1 Surveys carried out by British Geological Survey and University College London