{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/55811/","name":"Flood zone for ZIP 55811 — Duluth, MN","description":"Flood zone data for ZIP 55811 (Duluth, Minnesota), 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":"55811","city":"Duluth","state":"MN","stateFull":"Minnesota","county":"St. Louis County (MN)","countySlug":"st-louis-county","geo":{"latitude":46.7867,"longitude":-92.1005}},"stateContext":{"topConcern":"Radon Zone 1, lead in older Twin Cities housing","narrative":"Minnesota is uniformly Zone 1 radon. Twin Cities + Duluth carry LCRR lead-service-line obligations. Spring snowmelt flooding affects FEMA AE zones along the Red River + Minnesota River."},"radonZone":null,"airQuality":null,"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/flood-zone/55811/","zipDashboardUrl":"https://zipradar.org/zip/55811/","zipDashboardApiUrl":"https://zipradar.org/api/zip/55811/","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/55811/"}}