Rotary drilling of a scout water well north of the Eden - Burnside Fault, penetrated a productive limestone aquifer between 63 and 102 metres in the Port Willunga Beds, within the Adelaide Plains sedimentary basin. Production testing indicates that a yield of approximately 500 m3/day (5 000 gallons/hour) may be obtained from a properly screened and developed well in the South Brighton area. The cost of a production well, including casing and development is estimated to be $8 000.