Library

Browse our library for more information on the National Wetlands Inventory and the work we do. If you need help accessing a document, please email us at: wetlands_team@fws.gov.

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National Wetlands Inventory Program Fact Sheet

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.

Wetlands Data Layer Fact Sheet

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.

Wetlands Status and Trends Reports Fact Sheet

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...

National Wetlands Inventory 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.
This collection includes all available National Status and Trends Reports, State and Regional Status and Trends Reports, Status and Trends Technical Information, and Status and Trends Related Reports.
Classification of Wetlands and Deepwater Habitats of the United States

The Classification of Wetlands and Deepwater Habitats of the United States (Cowardin et al. 1979) was developed to support a detailed inventory and periodic monitoring of the Nation’s wet habitats using remote sensing. It became a National Standard in 1996 (FGDC-STD-004), but has been the de...

National Wetland Inventory Wetlands and Deepwater Map Code Diagram

This document provides the wetlands and deepwater classification hierarchy table. For assistance, please call 703-358-2171.

Browse our full collection of stories highlighting the importance of wetlands and the role the U.S. Fish and Wildlife Service plays in conserving them.