Flood zone · Wisconsin
Flood zone in Wisconsin
Flood zone (FEMA NFHL) data for ZIP codes in Wisconsin. Pick a ZIP below to dive into the flood zone summary.
Last verified 2026-09-24 · methodology
What lands here
Not on zipradar yet. The plan is the FEMA flood zone code, what it means in plain English, and the base flood elevation where assigned. Until then, look the address up on FEMA's Flood Map Service Center.
Source & refresh
FEMA NFHL. Refreshed quarterly loma updates. Primary source →
Wisconsin top concern
Lead pipes (Milwaukee), radon Zone 1
Wisconsin is uniformly Zone 1 radon. LCRR lead-service-line obligations heaviest in Milwaukee, Madison, Green Bay. Lake Michigan shoreline erosion expands FEMA AE zones in some lakefront counties.
See Wisconsin state page for the full state-level rollup across all 12 dimensions.
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