News and Updates

NH Wetlands Mapper
On-line web tool developed as a companion to the
NH Method


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The Method for Inventorying and Evaluating Freshwater Wetlands in New Hampshire (NH Method) provides communities, conservation groups and natural resources consultants a practical method for evaluating wetland functions. Originally published in 1991, the NH Method was revised for the first time in 2011 and updated in 2012 and 2013 to include the NH Wetlands Mapper and several other minor changes.

The updated 2013 version of the NH Method is available electronically via this website. Click on the NH Method Manual tab above to access the document as downloadable Sections and Appendices.

Note that there are no published paper copies of the NH Method. This allows us to update it more regularly. Updates to the NH Method will be posted on this web page.

The NH Method is widely used by New Hampshire communities and environmental consultants. It is the most frequently used wetland evaluation method for town-wide and watershed-based wetland assessments in the state. Since it was published in 1991, the NH Method has been adapted for use in several other states. 

Wetland Resources


The revision of the NH Method was made possible with funding from UNH Cooperative Extension and the Adelard A. and Valeda Lea Roy Foundation