Five exploratory wells were drilled by the Department of Mines and Energy in a continuing investigation aimed at improving the Streaky Bay township water supply. Two wells were drilled in the Water Reserve, with one later being backfilled as it was a suspected source of salt water contamination of the caisson. The remaining three wells investigated a probable 'fresh water basin' located 3 km east of the Reserve, which was proven unsuitable due to low supplies. A further 21 groundwater observation wells were drilled by the Engineering and Water Supply Department, using an Air Track percussion rig, to provide additional water table contour control and groundwater sampling points in and around the Reserve. The caisson was pumped out during the winter months after the occurrence of above average rainfall, but the groundwater salinity quickly rose after several dry months. Pump tests will be carried out to see whether the upward leakage of saline water can be controlled by pumping it from the lower aquifer. Approximately 50 observation wells are being monitored in the Maryvale - Yandra area in case of further investigations being warranted in this area.