Overdrafting and dropping water tables can cause the following: - Land subsiding (sinking) which permanently lowers the capacity of the aquifer - Chemical and

Overdrafting and dropping water tables can cause the following: - Land subsiding (sinking) which permanently lowers the capacity of the aquifer - Chemical and pH composition changes, which can limit the usefulness of water drafted in the future - Irreversible damage to native aquatic ecosystems, where the water table reaches the surface, which would have normally survived the drought.