{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/flood-zone/66603/","name":"Flood zone for ZIP 66603 — Topeka, KS","description":"Flood zone data for ZIP 66603 (Topeka, Kansas), 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":"66603","city":"Topeka","state":"KS","stateFull":"Kansas","county":"Shawnee County","countySlug":"shawnee-county","geo":{"latitude":39.0473,"longitude":-95.689}},"stateContext":{"topConcern":"Radon, tornadoes, Ogallala aquifer","narrative":"Kansas has Zone 1 radon coverage statewide and sits in central Tornado Alley. Western KS water systems draw from the depleting Ogallala aquifer; EPA SDWIS shows arsenic + nitrate compliance pressure in some rural systems."},"radonZone":null,"airQuality":null,"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/flood-zone/66603/","zipDashboardUrl":"https://zipradar.org/zip/66603/","zipDashboardApiUrl":"https://zipradar.org/api/zip/66603/","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/66603/"}}