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Flood map changes in Pennsylvania

Since November 2023, FEMA has published flood hazard notices covering 24 of Pennsylvania's 67 counties.

CountyNoticesMost recentAppeal window
Chester County5Sep 10, 2026—
York County3Sep 10, 2026—
Lancaster County4Aug 21, 2026—
Northumberland County1Aug 21, 2026—
Philadelphia County4Aug 21, 2026—
Washington County4Aug 21, 2026—
Dauphin County4Aug 6, 2026—
Franklin County2Aug 6, 2026—
Pike County3Aug 6, 2026Open until Nov 4, 2026
Allegheny County1Jul 9, 2026—
Butler County4Jun 11, 2026—
Clinton County2Jun 11, 2026—
Bucks County1May 18, 2026—
Wayne County2Jan 29, 2026—
Juniata County2Jan 21, 2026—
Montgomery County8Jan 21, 2026—
Montour County2Jun 12, 2025—
Luzerne County3Dec 18, 2024—
Lehigh County2Nov 25, 2024—
Northampton County2Nov 25, 2024—
Monroe County2Jul 5, 2024—
Bradford County1Apr 1, 2024—
Columbia County1Apr 1, 2024—
Blair County3Feb 15, 2024—

All counties in Pennsylvania

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