{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/99503/","name":"Flood zone for ZIP 99503 — Anchorage (Spenard), AK","description":"Flood zone data for ZIP 99503 (Anchorage (Spenard), Alaska), 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":"99503","city":"Anchorage (Spenard)","state":"AK","stateFull":"Alaska","county":"Anchorage Municipality","countySlug":"anchorage-municipality","geo":{"latitude":61.1901,"longitude":-149.8893}},"stateContext":{"topConcern":"Permafrost, wildfire, and remote drinking-water systems","narrative":"Alaska's federated data carries unusual constraints: many parcels sit on permafrost where ground temperatures shape foundation risk; FEMA NFHL coverage is incomplete outside major boroughs; EPA SDWIS systems can be unincorporated or village-operated. Wildfire risk has accelerated 2020-2025 in the boreal interior."},"radonZone":null,"airQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-07","canonicalUrl":"https://zipradar.org/topic/flood-zone/99503/","zipDashboardUrl":"https://zipradar.org/zip/99503/","zipDashboardApiUrl":"https://zipradar.org/api/zip/99503/","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/99503/"}}