Naturally occurring arsenic in groundwater at levels above the Drinking Water Standard (DWS = 50 ug/L) in East Central Wisconsin has resulted in the identification of an Arsenic 7 Advisory Area (AAA).

Alachlor is an herbicide used primarily to control grasses in corn and soybeans. Alachlor is manufactured by the Agricultural Group of Monsanto Company and sold under the trade name Lasso.

This study was designed to improve the detection of trace contaminants in ground water. The objectives were to (1) develop a new approach to concentrating sample analytes (while minimizing interferences)

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.