Survey was conducted to update and obtain new information, sample and photograph all flowing wells, and carry out field analyses on all water wells. 28 of 90 wells located were flowing. Water levels were declining, particularly near the southern margin of the basin, from uncontrolled flow in many artesian wells. A rehabilitation project has been carried out but work is still required on Cooryanna Bore. Many wells completed in unconfined Tertiary-Quaternary aquifers are now abandoned or disused. Within the Algebuckina Sandstone, forming the deeper confined aquifer, salinity is less than 1 500 mg/l and flows may exceed 4 500 m3/day. Pumping for Marree township has resulted in a cone of depression and further study is suggested.