National Wetlands Inventory

"The U.S. Fish and Wildlife Service is the principal federal agency tasked with providing information to the public on the extent and status of the nation’s wetland and deepwater habitats, as well as changes to these habitats over time.

What We Do

Our Services

We produce and distribute maps and other geospatial data on American wetland and deepwater habitats, as well as monitor changes in these habitats through time. This information is available to the public through two primary datasets: the wetlands geospatial dataset and wetlands status and trends reports. These provide complementary information on wetland and deepwater habitat type, location, and trends to support research, land management planning and analyses, policy development, and modeling activities.

Wetlands Mapper

The Wetlands Mapper is the primary public interface to the wetlands geospatial dataset and it delivers easy-to-use, map-like views of the nation’s wetland and deepwater resources. It spatially integrates National Wetland Inventory data with additional natural resource information and political boundaries to produce a robust decision support tool.

Status and Trends

Our Status and Trends reports provide estimates of U.S. wetland extent, type, and change specific to different time periods, ranging from the 1700s to 2009. Produced on a decadal basis, these reports inform policy-makers and the public on the status of the nation's wetlands and potential causes of wetland change..."
Wetlands