Status and Trends of Wetlands in the Conterminous US
2004 to 2009

50 Years of Monitoring Wetlands of the Nation

Since the preparation and publication of Circular 39 in 1954, the Service has been the principal Federal Agency monitoring changes to our Nation's wetlands. The most recent report represents a comprehensive and scientifically sound effort to track wetlands resources on a national scale. The Service has played a leading role in defining the biological extent of wetlands, implementing a national classification system, developing standards for mapping and monitoring wetland habitats and partnering with Federal and state agencies, Tribes and private organizations to track wetland changes over time.

Stemming directly from the findings in the series of Wetland Status and Trends reports, the Service has influenced Federal and state policies relating to wetlands conservation, protection, restoration and creation. The report findings have also promoted public awareness and education efforts regarding wetland types, distribution and ecological importance, and ultimately saved wetland habitat used by migratory waterfowl, endangered species, and other aquatic organisms.


1950's to 1970's Report1950's to 1970's Report
1780's to 1980's Report1780's to 1980's Report
1970's to 1980's Report1970's to 1980's Report

1986 to 1997 Report1986 to 1997 Report
1998 to 2004 Report1998 to 2004 Report
2004 to 2009 Report2004 to 2009 Report

- Last updated: May 4, 2020 -