FEMA flood hazard zones around Dover, Delaware
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Flood hazard zone shapes with their FEMA zone code, zone subtype, and Special Flood Hazard Area flag, from FEMA's National Flood Hazard Layer, for the City of Dover and about 1.5 km around it.

Published by: Federal Emergency Management Agency (FEMA)
Source: https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer/28
License: Public domain (U.S. government work)
Credit line: FEMA National Flood Hazard Layer. Not an official flood zone determination.
Updated: Monthly
Covers: Effective flood maps on the fetch date (fetched_date on each row).
Area: Dover, Delaware area: longitude -75.6026 to -75.4257, latitude 39.0873 to 39.2254.

Flood maps are a U.S. federal government work, and FEMA says its material may be copied and distributed without permission. The NFHL service was reachable on 2026-11-07 and has empty license fields.

Files
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- flood_zones.csv and flood_zones.json: batch_id, zone_key, zone, subtype, sfha, geometry_json, min_lon, min_lat, max_lon, max_lat, source_url, fetched_date, license_id, license_url, attribution, redistributable

Each file is built from OpenDover's database when you download it. In the CSV files, text that a spreadsheet would
treat as a formula (starting with =, +, @ or -) begins with an apostrophe so it opens as plain text. The JSON files
hold the values exactly.

This copy: 2026-11-08

More: https://opendover.org/data/fema-nfhl-flood-zones-dover/
API: https://api.opendover.org/v1/datasets/fema-nfhl-flood-zones-dover