A wellhead-protection study for the city of Sturgeon Bay, Wisconsin, demonstrates the necessity of combining detailed hydrostratigraphic analysis with groundwater modeling to delineate zones of contribution for municipal wells in a fractured aquifer.

The objective of this project was to characterize the hydraulic conductivity distribution of carbonate aquifers in the Silurian (Niagaran) and Ordovician (Sinnipee) dolomites in eastern Wisconsin (Figure 1) by integrating sequence stratigraphy with geophysical and hydrogeologic data.

The state of Wisconsin has more than 10,000 groundwater monitoring wells that will continue to be sampled into the future. Most samplers in this state use a bailer to purge and sample these wells.

The primary objective of this research is to evaluate the use of the computer program DUMPStat as an alternative or supplement to the use of indicator preventive action limits (PAL) for determining whether a landfill is in | compliance with groundwater quality standards.

A naturally occurring mineralized zone occurs in the lower Ordovician Galena-Platteville Dolomite and upper St. Peter Sandstone in east central Wisconsin.

Nitrate is one of the most common contaminants found in Wisconsin's groundwater. Groundwater naturally contains traces of nitrate that are produced by decaying vegetation and transported through soil by rainwater and snow melt.