FEMA flood map notices
Flood map changes in Hillsborough County, New Hampshire
FEMA has published 2 flood hazard notices covering Hillsborough County, New Hampshire since November 2023. The most recent, final flood hazard determinations, was published May 18, 2026.
Notices for Hillsborough County
- May 18, 2026FinalFinal Flood Hazard DeterminationsAlso covers 18 other counties
- Jan 29, 2024ProposedProposed Flood Hazard DeterminationsAlso covers 5 other counties · Appeal period closed Apr 29, 2024
Also covered by these notices
FEMA often studies whole watersheds, so one notice can span several counties.
- Santa Barbara County, CA
- Saguache County, CO
- Capitol Planning Region, CT
- Naugatuck Valley Planning Region, CT
- Northwest Hills Planning Region, CT
- Teton County, ID
- Tazewell County, IL
- Van Buren County, MI
- Olmsted County, MN
- Alamance County, NC
- Caswell County, NC
- Davidson County, NC
- Forsyth County, NC
- Guilford County, NC
- Randolph County, NC
- Rockingham County, NC
- Stokes County, NC
- Richland County, ND
- Boone County, NE
- Tulsa County, OK
- Providence County, RI
- Caldwell County, TX
- Freestone County, TX
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