{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/53703/","name":"Flood zone for ZIP 53703 — Madison, WI","description":"Flood zone data for ZIP 53703 (Madison, Wisconsin), sourced from FEMA NFHL.","topic":{"slug":"flood-zone","label":"Flood zone","source":"FEMA NFHL","sourceUrl":"https://www.fema.gov/flood-maps/national-flood-hazard-layer","refreshCadence":"Quarterly LOMA updates","summary":"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.","limitations":"For an official flood-zone determination (required by lenders), consult the FEMA Map Service Center directly. zipradar shows informational classifications only."},"place":{"zip":"53703","city":"Madison","state":"WI","stateFull":"Wisconsin","county":"Dane County","countySlug":"dane-county","geo":{"latitude":43.0731,"longitude":-89.4012}},"stateContext":{"topConcern":"Lead pipes (Milwaukee), radon Zone 1","narrative":"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."},"radonZone":null,"airQuality":null,"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/flood-zone/53703/","zipDashboardUrl":"https://zipradar.org/zip/53703/","zipDashboardApiUrl":"https://zipradar.org/api/zip/53703/","primarySourceUrl":"https://www.fema.gov/flood-maps/national-flood-hazard-layer","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/flood-zone/53703/"}}