{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/50266/","name":"Flood zone for ZIP 50266 — West Des Moines (IA), IA","description":"Flood zone data for ZIP 50266 (West Des Moines (IA), Iowa), 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":"50266","city":"West Des Moines (IA)","state":"IA","stateFull":"Iowa","county":"Polk County (IA)","countySlug":"polk-county","geo":{"latitude":41.5772,"longitude":-93.7115}},"stateContext":{"topConcern":"Radon Zone 1, agricultural water nitrates","narrative":"Iowa is one of the highest-radon states in the US — uniformly Zone 1. Agricultural runoff drives EPA SDWIS nitrate violations in small rural systems and even Des Moines Water Works. Tornadoes peak April-June."},"radonZone":null,"airQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-07","canonicalUrl":"https://zipradar.org/topic/flood-zone/50266/","zipDashboardUrl":"https://zipradar.org/zip/50266/","zipDashboardApiUrl":"https://zipradar.org/api/zip/50266/","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/50266/"}}