State Agencies
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Lake Management Tools
The Wisconsin Lake Modeling Suite (WiLMS) model is a lake water quality-planning tool. The WiLMS model structure is organized into four principal parts: front-end, phosphorus prediction, internal loading and trophic response. Models WiLMS 3.3.18 (…
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Lakes and Aquatic Invasive Species (AIS) Mapping Tool
In order to keep DNR servers up to date, DNR will be patching the GIS servers to the latest service level on the morning of Sunday, April 27. During this update, users may see unexpected issues with DNR’s web map viewers. We apologize in advance for…
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Nondiscrimination Policy and Procedures
The Wisconsin Department of Natural Resources (DNR) is committed to promoting diversity, fairness, equity and the principles of environmental justice. We also ensure we do not discriminate in our programs, decisions, actions or delivery of services.
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St. Croix SWCDA - Towns of Hudson and Warren
Many drinking water wells in the towns of Warren and Hudson, situated in St. Croix County, are contaminated with trichloroethylene (TCE), a volatile organic compound (VOC). A Special Well Casing Depth Area (St. Croix SWCDA - Towns of Hudson and…
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PFAS Contamination in Dane County
PFAS contamination has been detected throughout Dane County in soil, municipal wells, private wells, surface water and groundwater.Subscribe to updates about PFAS contamination in Wisconsin.Submit a question, comment or concern about PFAS in Dane…
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Consumption Advisories and PFAS
The DNR works closely with the Department of Health Services (DHS) to issue consumption advisories for per- and polyfluoroalkyl substances (PFAS) where and when necessary. Fish consumption advisories are based on guidance from the Great Lakes…
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Aquatic and Wetland Invasives Species Monitoring
The Wisconsin Department of Natural Resources (DNR) Aquatic Invasive Species Monitoring program is a collaboration of citizens, partners and the DNR to find, report, map and survey invasive species. The program is guided by species identified in NR…
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Wisconsin Geographic Names Council
The Wisconsin Geographic Names Council (WGNC) is a state council established to maintain uniform geographic name usage throughout Wisconsin. The WGNC comprises representatives of state agencies most concerned with geographic information. Sharing its…
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About Beach Advisories And Closings
Beach Closings and Advisories MapBeach Advisory ReportsIn order to alert the public about potentially unhealthy water quality conditions at Great Lakes beaches, local health departments sometimes post swimming advisories. Depending on the severity…
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Frequently Asked Questions
Frequently asked questions about beaches are answered on this page.