One standby groundwater production well and one exploratory hole were successful drilled at Quorn in March/April 1978. The long term yield of the production well has been estimated at 600 kl/day, with the produced groundwater salinity marginally increasing from 1914 to 1985 mg/1 during the 48 hour discharge test. As this well taps the same aquifer as the two existing production wells, it is considered essential that water level measurements and salinity tests be regularly carried out on all of the wells after the new well is brought into commission. The exploratory drillhole has opened up the possibility of starting another groundwater production well field 5 km south-west of Quorn, a scenario which deserves further evaluation.