Wetlands NWI

The National Wetlands Inventory (NWI) layer shows wetland areas as classified by the U.S. Fish and Wildlife Service. This dataset is known to be outdated in many areas, with some data not updated since the 1970s. It uses standard federal symbology including blue for marine/estuarine wetlands and green for palustrine (freshwater) wetlands. While historically significant, this layer should be used as a baseline reference and cross-checked with more current wetland data.