Water supply study in Dakar area shows that surface and groundwater contribute about 39% and 61% respectively to the drinking water supply in this region over the last 20 years (2000-2019). Indeed, the 61% of groundwater contribution are distributed between 23%, 19%, 12%, 6% and 1% respectively by the Maastrichtian, Eocene, Paleocene, infrabasaltic and Thiaroye groundwater’s. Population water demand estimation in the Dakar region reveals a gradually changing with population growth. Comparative analysis of water demand in relation to the water consumed for domestic purposes indicates that water consumption always remains below water needs between 2000 and 2019, thus showing a water deficit that is perpetual during this period. Results analysis show low water deficit between 2009 and 2013, especially in 2012 when the value was around 1 920 315 m3/y.
Keywords: Groundwater pumping, Maastrichtian, Paleocene, Eocene, infrabasaltic, aquifer