Public-supply pumpage in Wisconsin

This report summarizes the amounts and distribution of the pumpage of ground water for public supplies from four aquifers in Wisconsin. The data are for 1979 and reflect the pumpage from about 1,100 wells in 485 communities. The distribution and amount of pumpage is estimated to be similar for subsequent years.

Of the water pumped for public supplies, 95 percent comes from two major aquifers--the sand-and-gravel and the sandstone aquifers. Lesser amounts of water come from the Silurian dolomite, which is present onlyl in a narrow band in eastern Wisconsin, and from the generally low-yielding Precambrian basement rock that underlies the entire state.