Resistivity investigations were carried out on Wardang Island in an attempt to determine drilling sites favourable for fresh underground water. The thickness of the Bridgewater Formation (aeolianite) and basement elevations were mapped and contoured. Drilling sites were selected where thicker sections of aeolianite associated with basement depressions were found. Of the seven sites chosen five are within fully enclosed depressions while at the other two the depression is open to the sea. Overlying a low resistivity (2-5 ohm-m) saline near basement zone is a thinner intermediate resistivity (20-40 ohm-m) zone which may indicate a fresh water zone. Only drilling can determine if the aeolianite contains water at these sites and if the overlying zone is fresh. However, the probability of a suitable supply from such localised saline environments is low and pumping rates would be strongly dependent on recharge from rainfall.