Approximately 44% of the population in Wisconsin’s Grant, Iowa, and Lafayette counties relies on private groundwater wells. Collectively, these residents are served by over 18,000 wells. Private wells are not monitored or regulated by federal, state, or local governments; instead, homeowners are responsible for the maintenance and testing of their private well, including any treatment […]

Private wells are the primary water source for approximately one-third of Wisconsin residents. Approximately 9% of private wells are above accepted health guidelines for nitrate-nitrogen in drinking water. Between 15-25% of private wells contain coliform bacteria­—an indicator of potential pathways for harmful pathogens that enter a well water system. Private wells do not benefit from […]