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Groundwater Quality Publications

Wisconsin Well Water Quality Viewer

Private well data for Wisconsin includes nitrate and pesticide concentrations.

Nitrate in Wisconsin’s Groundwater, 2021

Pesticides in Wisconsin’s Groundwater

Well Water for Rural Residential Subdivisions

Wisconsin Groundwater Quality: Agricultural Chemicals in Wisconsin Groundwater

Between March and August 2023, 380 private drinking water wells were sampled as part of a statewide survey of agricultural chemicals in Wisconsin groundwater. The survey aimed to obtain an updated assessment of pesticides and pesticide breakdown products in groundwater, and to compare their concentrations with those found in earlier surveys.

Land Use Policies for Groundwater

Potential Land Use Policies for Counties to Improve Nitrate Levels in Drinking Water

Protecting Wisconsin’s Groundwater through Comprehensive Planning