Flood zone · Pennsylvania
Flood zone in Pennsylvania
Flood zone (FEMA NFHL) data for ZIP codes in Pennsylvania. Pick a ZIP below to dive into the flood zone summary.
Last verified 2026-05-13 · methodology
What lands here
Pages show the flood zone code, what it means in plain English (1% annual chance zone, 0.2% annual chance zone, or outside mapped hazard), and the base flood elevation where assigned.
Source & refresh
FEMA NFHL. Refreshed quarterly loma updates. Primary source →
Pennsylvania top concern
Radon, lead pipes (older cities)
Pennsylvania has Zone 1 radon across most of the state. LCRR lead-service-line obligations in Philadelphia, Pittsburgh, Reading, Allentown, Erie. EPA SDWIS small-system compliance varies.
See Pennsylvania state page for the full state-level rollup across all 12 dimensions.
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10 Pennsylvania ZIPs
ZIP 19103
Philadelphia, PA
Flood zone →
ZIP 15222
Pittsburgh, PA
Flood zone →
ZIP 17101
Harrisburg, PA
Flood zone →
ZIP 16801
State College, PA
Flood zone →
ZIP 15217
Pittsburgh (Squirrel Hill), PA
Flood zone →
ZIP 17013
Carlisle, PA
Flood zone →
ZIP 19610
Wyomissing, PA
Flood zone →
ZIP 15601
Greensburg (PA), PA
Flood zone →
ZIP 17110
Harrisburg (PA), PA
Flood zone →
ZIP 18103
Allentown (PA), PA
Flood zone →