Aquifer storage and recovery (ASR) is being developed as a solution to provide an emergency town water supply in a location where blue- green algae make River Murray water unfit for domestic use during summer. Algae-free river water will be injected during winter into a highly saline (35 000 mg/L), unconfined, high transmissivity limestone aquifer, and a small component extracted during summer. Preliminary injection testing with 50 ML developed a lens with a thickness of 10 m and an initial salinity of 4500 mg/L. Following 125 days residence this lens marginally decayed and drifted slightly under the regional gradient. The injection of 300-500 ML at a rate of 50 L/s is currently underway, which is expected to allow the development of a sacrificial lens in which the potable water supply lens of 20 ML can be injected and maintained. Possible upconing on withdrawal is not expected to be a problem due to the small drawdowns experienced during pumping. In addition, several extraction points may be used. An ASR scheme will allow for the expansion of Clayton. This site is considered to be novel in Australia, and the results are likely to be transferable to other locations.