{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/49503/","name":"Flood zone for ZIP 49503 — Grand Rapids, MI","description":"Flood zone data for ZIP 49503 (Grand Rapids, Michigan), 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":"49503","city":"Grand Rapids","state":"MI","stateFull":"Michigan","county":"Kent County (MI)","countySlug":"kent-county","geo":{"latitude":42.9634,"longitude":-85.6681}},"stateContext":{"topConcern":"Lead pipes (post-Flint), Great Lakes erosion","narrative":"Michigan's LCRR obligations are among the heaviest in the US — Detroit, Flint, Benton Harbor, Lansing all carry significant lead-service-line replacement commitments. Great Lakes 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/49503/","zipDashboardUrl":"https://zipradar.org/zip/49503/","zipDashboardApiUrl":"https://zipradar.org/api/zip/49503/","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/49503/"}}