National Wetlands Inventory
Ecological Services

Wetland Classification Codes

The wetland classification codes are a series of letter and number codes that have been developed to adapt the national wetland classification system to map form. These alpha-numeric codes correspond to the classification nomenclature that best describes the habitat. (for example, PFO1A)

The Wetland Code Interpreter is a tool that will instantly provide the detailed habitat descriptions for an area represented by the wetland classification code. Enter a wetland area's code into the interpreter and obtain the classification of that wetland area as defined in Cowardin et al (1979).

Click here to open the Wetland Code Interpreter
(pop-up window)

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Last updated: May 10, 2017