|Water and ice|
The problem with drawing considerable amounts of water from wells is that it depletes the aquifer. Aquifers are often not fully recharged when wells are used, since after the water is used it is commonly discharged into rivers, which runs the water out of the region. A graphic in the StarTribune helps illustrate the problem, Graphic: A future of water shortages.
Some consideration is being given to pumping treated water back into the aquifer. It is likely that the state will have to create greater restrictions on water usage in order to avoid depleting future groundwater supplies.
An interactive map of Minnesota's water levels is also available on the web, Interactive map: The state of Minnesota's groundwater.