Minnesota also has a significant amount of groundwater, which is stored in underground aquifers. Groundwater is used for drinking, irrigation, and industrial use, and is particularly important in areas where surface water is scarce. The largest aquifers in Minnesota are the Prairie du Chien-Jordan Aquifer and the Mount Simon-Hinckley Aquifer.
The state of Minnesota also has a number of water conservation programs in place to help protect and manage its water resources. These programs include public education campaigns, water use restrictions, and financial incentives for water conservation.