Several groundwater issues have been highlighted in the Meningie-Narrung area as a result of the regional investigation into the hydrogeology of the Murray Basin. Dryland salinity is the most important, with an estimated 45 000 ha to be affected by rising watertables within 50 years if no action is taken. Transient electromagnetic surveys have been used to delineate areas of lower salinity groundwater which could be used for stock supplies in the event of a blue-green algae outbreak in the lakes, or to reduce the costs of using mains water for stock to the east of Meningie. Disposal of dairy effluent on the salt lakes would have virtually no detrimental effects on water quality because they are groundwater discharge areas, however, other issues should be considered before the practice is adopted.