Wisconsin Department of Natural Resources

Wetland indicators map

The Wetland indicators map shows the intersect of hydric soils mapped by the USDA Natural Resources Conservation Service and topography indicative of a wetland landscape position based on 10 m USGS topographic data. Mapped hydric soils are typically found within areas designated as wetlands. Intersecting soils information and landscape position can identify potential wetlands. The "tiger-striping/terracing" that occurs in the layer is the result of the DEM creation. Any area between the stripes should be assumed to be a part of the wet area. For more information on the mapped soil types, please use the Identify tool and link to the USDA Natural Resources Conservation Service Web Soil Survey.

Note: The Wetland indicator layer also includes Wisconsin Wetland Inventory Layer outputs to make a preliminary determination of the potential for wetlands on a given property. If the property contains the purple shading the property has soils and a landscape position commonly found in wetlands and can be used as an indication that wetlands may be present on the property. The yellow shading indicates wetlands mapped on the Wisconsin Wetland Inventory. If the map shows yellow or purple shading you should contact a wetland professional to visit the property to conduct an on-site investigation. Only a wetland professional can verify wetlands are present on a property.

Disclaimer: The Wisconsin wetland inventory and wetland indicator map are important tools that can be used to provide a preliminary indication of wetland presence on a property. There are cases where wetlands exist on a property where these maps do not show wetlands or indications of wetlands. This is due to the year and scale of aerial photography used to map soils and wetlands. Small wetlands and areas of wet soil are often not shown on these maps. Therefore, it is critical to also conduct an on-site investigation of the property to verify the presence or absence of wetlands.

There is no attempt, in either the design or products of the Wetland indicators map or the Wisconsin wetland inventory, to define the limits of jurisdiction of any Federal, State, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to potential wetland areas should seek the advice of appropriate Federal, State, or local agencies concerning specific agency regulations. The only method of determining the legal extent of a wetland for state regulations is a field delineation of the wetland boundary by a professional wetland delineator.

Last updated: April 12, 2018