Kewaunee County officials invite the public to the presentation of “Sources of Fecal Contamination in the Dolomite Aquifer in Northeastern Wisconsin” beginning at 6 p.m. Wednesday in the Exhibition Hall at the Kewaunee County Fairgrounds, 625 Third St., Luxemburg.

The presentation will discuss the findings of a county-wide randomized private well sampling plan, stratified by the depth of bedrock, for nitrate and indicator bacteria and identify the source of contamination using virus fecal markers for septic or bovine.

Kewaunee County Land & Water Conservation Director Davina Bonness says that this presentation will show how vulnerable the county’s unique karst geology is and the sources impacting its groundwater.

“The contamination issue is a multivariable problem, it’s a combination of human and bovine sources, which indicates we need to work together to solve our groundwater issues,” Bonness said.

The presenters include Dr. Mark Borchardt, USDA-Agricultural Research Service; Dr. Maureen Muldoon, University of Wisconsin-Oshkosh Department of Geology; and Randy Hunt, U.S. Geological Survey Wisconsin Water Science Center.

Borchardt has presented some of the findings in several venues and conducted media interviews about the study, but Bonness has said this week’s presentation is the first comprehensive review of all of the group’s findings.