Dane County's abundant surface water resources are monitored and assessed primarily by the Wisconsin Department of Natural Resources (WDNR). Major streams and lakes are classified into categories based on the aquatic organisms present. These classifications provide an indication of water quality and fishery conditions.

Agricultural and urban land uses contribute to nutrient rich runoff reaching surface waters. Impervious surfaces and removal of wetlands also increases the flow of stormwater to local waterways. Explore issues facing our surface water and see maps of degraded water resources.

Effective water quality planning depends on long-term assessment and monitoring. The Capital Area Regional Planning Commission uses long-term datasets to evaluate regional trends.

Learn about practices meant to protect the region's streams, shorelands, and lakes.

Dane County
Land and Water Resources Viewer: An interactive county map showing watershed boundaries, thermally sensitive areas, cold water communities and more.