FEMA flood map notices
Flood map changes in Merrimack County, New Hampshire
FEMA has published 3 flood hazard notices covering Merrimack County, New Hampshire since November 2023. The most recent, final flood hazard determinations, was published Aug 6, 2026.
Notices for Merrimack County
- Aug 6, 2026FinalFinal Flood Hazard DeterminationsAlso covers 17 other counties
- Aug 27, 2025FinalFinal Flood Hazard DeterminationsAlso covers 5 other counties
- Dec 13, 2024ProposedProposed Flood Hazard DeterminationsAlso covers 1 other county · Appeal period closed Mar 13, 2025
Also covered by these notices
FEMA often studies whole watersheds, so one notice can span several counties.
- Madison County, AL
- Shelby County, AL
- Capitol Planning Region, CT
- Naugatuck Valley Planning Region, CT
- Northwest Hills Planning Region, CT
- Baker County, GA
- Chatham County, GA
- Grady County, GA
- Mitchell County, GA
- Rabun County, GA
- Cook County, IL
- Kane County, IL
- Labette County, KS
- Neosho County, KS
- Buchanan County, MO
- Kearney County, NE
- Hunterdon County, NJ
- Somerset County, NJ
- Wayne County, NY
- Sevier County, TN
- Hampshire County, WV
- Hardy County, WV
- Pocahontas County, WV
What these notices mean
- Proposed
- FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
- Final
- Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
- Map revision
- A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.
Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean