Sudden geometric increase in population of Ado-Ekiti has lead to an
increase in demand for water and harnessing of subsurface water
reserve. This research investigated the possible infiltration of
dissolved mineral from weathered rock into subsurface water in the
area (basement complex rocks), and comparing the mineral level with
the set standard for quality water by the World Health Organization
Physical test were carried out on hardness, colour, odour,
conductivity, pH, and turbidity. Chemical test for sodium (Na+
) and
potassium (K2+) was also done using experimental scientific set
standard. The analysis of the sodium, potassium ions, and the
conductivity of the water indicate that dissolved mineral from rocks
have great influence on the underground water property. The level of
the dissolved mineral is within the acceptable limit for water quality
standard set by the W.H.O. Sourcing for underground water should
not be based on hydro geological variable alone but possible
chemical interference from the geology of the environment (rock
type).