A survey of drainage wells has shown that most are being used to dispose of street runoff and parkland drainage. Silt traps currently in use are poorly designed and not adequately maintained. Best drainage occurs on the northern side of the town where the Mannum Formation (limestone) is more permeable due to the presence of small solution channels. Disposal of wastewaters underground causes saline groundwater to be displaced into the River Murray and should not-be encouraged for this reason. Rooftop runoff should be diverted to domestic rainwater tanks and the reticulated sewerage system could be expanded to incorporate all of the township area. Silt trap design should be improved and silt traps maintained to maximise drainage efficiency.