This study focuses on the piped water supply to Nasarawa town of about 100,000 residents in north central
Nigeria. Hydrogeological mapping of the area entailed location of rock outcrops and measurements of ground
water table in hand dug wells. The area is underlain by the Precambrian Basement Complex Crystalline rocks
such as schist, gneiss, migmatiteandgranite. These rocks are dominantly fractured in NNE-SSW and NSdirections.
These structures have effect on the drainage pattern and influence both the groundwater and surface
water flow directions in the area. Static water resources of the Nasarawa dam drainage basin upstream from the
embankment are1, 814x 106 m3. Total dynamic water resources are 90,547,182 m3/a out of which 45,273,591
m3/a, are utilizable dynamic water resources while the remaining 45,273,591 m3/a, are non-utilizable dynamic
water resources. Current water demand in Nasarawa town and environs is 4.0 x 106 m3/a while the ultimate
water demand was estimated at22.5 x 106 m3/a. Groundwater in the study area is enough to supplement surface
water to meet the current as well as the future water demand of people in the area.