The National Wetlands Inventory Version 2.0 is now available.  Here is the announcement from Mitch Bergeson, Project Lead from the FWS:

Dear Wetland Colleague,

The U.S. Fish and Wildlife Service’s National Wetland Inventory has been the source of the Nation’s most comprehensive wetland dataset since the 1970s. The Wetlands Mapper alone is visited by over 1,000 users every day. Although the National Wetlands Inventory dataset has changed over time, May 2016 marks a significant evolution in its detail and predictive power. The NWI 2.0 dataset is a more comprehensive characterization of all surface water features on the landscape, including a wide range of wetlands and other aquatic ecosystems, like streams. Although there have been distinct wetland and stream datasets in the past, this information has never been presented together as a single polygonal dataset of over 32 million features using a consistent ecologic classification system. And it’s now available to our partners and the public.

NWI 2.0 was created by keeping the wetland and deepwater polygons from the original digital wetlands spatial data layer, and adding smaller wetland or surface water features that were originally omitted from the digital dataset. Additionally, the NWI data are supplemented with hydrography data as a secondary source for any single-line stream features not mapped by the NWI. Bringing-together these sources of information greatly enhances the ability of users to trace the potential movement of water, and all that it carries, as it moves between wetlands and other aquatic ecosystems.

NWI 2.0 includes wetlands data for all fifty states plus U.S. Territories including, Puerto Rico, the Virgin Islands, Guam, Tinian, Saipan, Rota, American Samoa and the Palmyra Atoll. The NWI 2.0 mapper was developed using java script so people can access it on their mobile devices, allowing users to navigate, identify, print, and download data and do so in the field.

This comprehensive dataset allows the accurate, consistent calculation of area and ecological classification to best support geospatial summaries and modeling for management. Opportunities to apply NWI 2.0 include tracing contaminant pathways through aquatic systems, identifying and prioritizing habitat restoration opportunities, examining continuity or dissection of habitat corridors, quantifying aquatic and wetland resource types, and facilitating ecological modeling. For more information on the NWI 2.0 dataset visit:

View the NWI 2.0 dataset and our new Wetlands Mapper at:

Mitch Bergeson

These data are also available on the CPA: