Trends in ground-water levels in Wisconsin through 1966

The water supplies of Wisconsin are the State's most valuable natural resource. Although the State has abundant water supplies to maintain the perennial flow of most streams, and to sustain large increases in municipal, agricultural, and industrial use in many areas, the available supply is not distributed equally throughout the State, either areally or in time. Intelligent development of all water resources depends on knowledge of the occurrence, distribution and movement of water, the amount of discharge to and from a region, the interrelationship of ground and surface water, and the quantity and quality of the water available.