{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/03101/","name":"Flood zone for ZIP 03101 — Manchester (NH), NH","description":"Flood zone data for ZIP 03101 (Manchester (NH), New Hampshire), 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":"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.","limitations":"For an official flood-zone determination (required by lenders), consult the FEMA Map Service Center directly. zipradar shows informational classifications only."},"place":{"zip":"03101","city":"Manchester (NH)","state":"NH","stateFull":"New Hampshire","county":"Hillsborough County (NH)","countySlug":"hillsborough-county","geo":{"latitude":42.9956,"longitude":-71.4548}},"stateContext":{"topConcern":"Radon, lead in older housing","narrative":"New Hampshire is uniformly Zone 1 radon. Older Manchester + Nashua + Portsmouth housing stock carries lead-service-line risk. Coastal flood zones limited to small NH coastline."},"radonZone":null,"airQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-07","canonicalUrl":"https://zipradar.org/topic/flood-zone/03101/","zipDashboardUrl":"https://zipradar.org/zip/03101/","zipDashboardApiUrl":"https://zipradar.org/api/zip/03101/","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/03101/"}}