Project Number:
DNR-087
Other Project Number:
WR91R002
Funding Year:
1991
Contract Period:
Funding Source:
DNR
Investigator(s) and affiliations:
Rebecca S. Burkel, University of Wisconsin–Green Bay
Abstract:
Abstract: Concentrations of arsenic, ranging from 1.0 to 1200 micrograms per liter (ug/L), were detected in groundwater over a broad geographic region in Outagamie and Winnebago Counties in Wisconsin. The hydrologic and geochemical properties of the area were examined and the source of arsenic determined to be natural. Groundwater collected from two geologic formations, the St. Peter Sandstone and the overlying Platteville/Galena Dolomite, were found to be the principle sources of the elevated arsenic concentrations. These two formations supply most of the drinking water to a large portion of eastern Wisconsin.