Abstract: Spatial analysis is key to mitigating ground water resource problem related to lack of reconnaissance prior to prospecting using terrameter. Traditionally, time consuming and expensive resistivity measurements are indiscriminately applied for feasibility of ground water potential. The results have often led to exploitation of dry ground wells. Ground water modelling is essential to preliminarily identify potential sites for deployment of resistivity mesurements. Major economic activity in Meru County is rain-fed agriculture solely dependent on erratic rainfall. The big disparity in altitude and rainfall impacts on availability of reliable water sources especially during the dry season when locals travel long distances in search of water.