{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/57101/","name":"Flood zone for ZIP 57101 — Sioux Falls, SD","description":"Flood zone data for ZIP 57101 (Sioux Falls, South Dakota), 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":"57101","city":"Sioux Falls","state":"SD","stateFull":"South Dakota","county":"Minnehaha County","countySlug":"minnehaha-county","geo":{"latitude":43.546,"longitude":-96.7313}},"stateContext":{"topConcern":"Radon Zone 1, agricultural water, tornadoes","narrative":"South Dakota is uniformly Zone 1 radon. Agricultural runoff drives EPA SDWIS nitrate compliance pressure in small rural systems. Tornado risk peaks April-June."},"radonZone":null,"airQuality":null,"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/flood-zone/57101/","zipDashboardUrl":"https://zipradar.org/zip/57101/","zipDashboardApiUrl":"https://zipradar.org/api/zip/57101/","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/57101/"}}