Reliable access to clean water for drinking, agriculture and sanitation is one of the biggest challenges faced by the 135 million people who live in Africa’s semi-arid Sahel region. Thirteen countries tap into the groundwater of five aquifers systems that cross national borders in the region: the Iullemeden Aquifer System, the Liptako-Gourma-Upper Volta System, the Senegalo-Mauritanian Basin, the Chad Basin and the Taoudeni Basin.
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