Stable isotope and Hydro-geochemical methods have been used to characterize groundwater in the Ga West Municipal Area of Ghana. Residents in the municipality mostly depend on groundwater for their water needs. However, high salinity groundwater obtained in the area poses difficulties for current water supply as well as future exploitation. Schoeller and Piper plots have been used to characterize the groundwaters to determine the sources of salinity. The dominant groundwater composition in both shallow and deep wells sampled is Na-Cl, with concentration increasing substantially with well...