NH Office of Energy and Planning
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Office of Energy and Planning - an official New Hampshire Government website
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Information about floodplain maps, flood studies and data

In support of the NFIP, FEMA has issued Flood Insurance Rate Maps (FIRM) for most NFIP participating communities in New Hampshire. FIRMs identify areas with a one percent annual chance flood hazard in a community. These areas are called Special Flood Hazard Areas (SFHA). The one percent annual chance flood is also referred to as the base flood or 100-year flood. The flood hazards areas shown on FIRMs are based on the best information available at the time the maps were prepared.

  • Floodplain Maps - Includes information and links on where to view the FEMA floodplain maps for NH communities.
  • Floodplain Map Changes - Includes information about the application processes that are required to change FEMA's floodplain maps.
  • Flood Studies and Data - Includes information about the FEMA Flood Insurance Studies, which accompany the floodplain maps, and other flood studies and data developed by other federal and state agencies.
  • Map Modernization/Risk MAP Programs - Includes information about FEMA's recent two programs to update the nation's floodplain maps.
  • Vertical Datum pdf file- Includes information about the vertical datum that is currently used on the floodplain maps in all counties in New Hampshire.

Portable Document Format Symbol Portable Document Format (.pdf). Visit nh.gov for a list of free .pdf readers for a variety of operating systems.


NH Office of Energy and Planning
Governor Hugh J. Gallen State Office Park
Johnson Hall, 3rd Floor  |  107 Pleasant Street  |  Concord, NH 03301
(603) 271-2155  |  fax: (603) 271-2615