National Wetlands Inventory

The National Wetlands Status and Trends reports, issued every ten years, provide robust scientific estimates of the extent of seventeen wetland and deepwater habitats, as well as change in their area over time. This fact sheet provides a summary and introduction to the 2009-2019 report.

Under the Emergency Wetlands Resources Act of 1986, we are required to submit decadal reports to Congress on wetland status and trends (area and change). These National Wetlands Inventory (NWI) Program reports provide the data necessary to effectively manage wetlands and determine if the goal of...

The National Wetlands Inventory (NWI) provides users with scientifically-based information on wetlands and deepwater habitats to promote the understanding and conservation of the Nation’s wetland resources through research, education, resource management and policy development.

The NWI Wetlands Data Layer provides users with scientifically-based information on wetlands and deepwater habitats to promote the understanding and conservation of the Nation’s wetland resources.

Recognizing the importance of America’s wetlands, Congress enacted the Emergency Wetlands Resources Act (Public Law 99-645) of 1986. It requires the U.S. Fish and Wildlife Service (Service) to map wetlands in the United States, as well as conduct national status and trends studies and report to...