National Wetlands Inventory

National Spatial Data Infrastructure (NSDI) Wetlands Layer:


Visit the Wetlands Layer index page for more information.

Contact Information:


You can also email the FWS Customer Service Center, or call 1.800.344.WILD (1.800.344.9453).

Latest News and Reports
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Status and Trends of Wetlands In the Coastal Watersheds of the Conterminous US 2004 to 2009 – Coming Soon!
Coastal Watershed photo iconWorking in conjunction with principal Federal agencies the USFWS and NOAA have produced updated data on more recent trends of wetlands in the coastal watersheds to help prioritize conservation planning efforts and contribute additional information on coastal wetland trends. This report updates and expands previous information on coastal wetland loss by incorporating new data for the coastal watersheds of the Atlantic, Gulf of Mexico and Great Lakes and in addition, providing information for the Pacific coast along the States of Washington, Oregon and California.  Click here to view/download the Fact Sheet (PDF). 
SWI map iconSurface Waters and Wetlands Inventory – Coming Soon!
Often referred to as Version 2.0 of the National Wetlands Inventory, the Surface Waters and Wetlands Inventory provides more inclusive geospatial data of all wetlands and surface water features. This national geospatial data product will contribute substantially to improved modeling of flow and water movement in surface water basins, channels, and wetlands.  For more information visit the SWI Product Summary web page.
Plant List website iconPublication of the Final National Wetland Plant List
The US Army Corps of Engineers, as part of an interagency effort with the US Environmental Protection Agency, the US Fish and Wildlife Service and the US Department of Agriculture Natural Resources Conservation Service, is announcing the availability of the final 2012 National Wetland Plant List (NWPL). The NWPL is used to determine whether the hydrophytic vegetation parameter is met when conducting wetland determinations under the Clean Water Act and the Wetland Conservation Provisions of the Food Security Act.  The list will become effective on 6/1/12.  Click here to download the list, or click here to for the Federal Register notice.
Coastal Condition Report iconNational Coastal Condition Report IV
The latest version of the National Coastal Condition Report has been released by EPA. The reports describe the ecological and environmental conditions in U.S. coastal waters. They summarize the condition of ecological resources in the coastal waters of the US and highlight several exemplary federal, state, tribal, and local programs that assess coastal ecological and water quality conditions. Click here to download the report.
Status and Trends Report iconStatus and Trends of Wetlands in the Conterminous United States 2004 to 2009: Report to Congress on the status and trends of our Nation's wetlands resources
This report is the latest in a continuous series spanning 50 years of wetlands data. It represents the most comprehensive and contemporary effort to track wetlands resources at a national scale.
Click here to download the report and related documents.
Flood Map iconCharacterization of Lands Inundated by the Flood Event of 2011 
In April and May of 2011, flooding inundated lands along the Ohio and Lower Mississippi Rivers. Flood levels along portions of the Mississippi River peaked at the highest levels since 1937. An analysis of the extent of flooding was determined by the comparison of MODIS imagery between pre-flood and flood crest conditions. Click here to download summary (PDF).
sample report iconFree Publications
We have a limited amount of hard copy publications available for free: 2000 and 2006 Status and Trends Reports, and the Classification of Wetlands and Deepwater Habitats. Send your request (name and address) to Wetlands_Team@fws.gov.
Data Collection document iconData Collection Requirements and Procedures for Mapping Wetland, Deepwater and Related Habitats
With the adoption of new Federal Wetlands Mapping Standards, the USFWS has developed an important companion document (1MB PDF) that describes the technical procedures and requirements for wetlands map data. The document is intended to aid to organizations or individuals mapping wetlands and applying the Cowardin et al. classification system. This document explains the appropriate application of wetland classification and mapping process, and how to achieve the data quality requirements now required in the new FGDC Standards.
Riparian Document iconA System for Mapping Riparian Areas In The United States
The new standard (1.3MB PDF) is designed to guide current and future riparian digital mapping projects. These technical procedures serve as a reference for conducting the image analysis work normally associated with mapping riparian and associated habitats. A riparian classification decoder and a riparian classification system chart are also available.
FGDC Wetlands Mapping Standard iconFGDC Wetlands Mapping Standard
 Secretary of the Interior Ken Salazar has announced the adoption of a Wetlands Mapping Standard (PDF) that provides minimum requirements and guidelines for wetlands mapping efforts. The new standard is designed to guide current and future wetlands digital mapping projects and enhance the overall quality and consistency of wetlands data. Quality data on wetlands are considered critical for planning effective conservation strategies to benefit USFWS resources now and in the future. (News Release) (Questions and Answers)
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