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This site describes the major surface water GIS data sets and maps commonly available for Minnesota, along with links to important related non-GIS data collections. The site does not list all possible datasets, but rather focuses on the most current ones and those with the most utility for users.
Data sets are organized by water resources category:
Each resource page starts by identifying major GIS data sets, then expands the list with links to background information about the resource. The navigation links at the top of each page will allow you to move within the water resources pages.
Related topic webpage: ground water