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Flood hazard areas

See whether a site sits in a mapped special flood hazard area before taking it further. Each polygon keeps its flood zone, subtype and base flood elevation where the map publishes one, with the source date of its state's flood map package.

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Data product
Environment
Access
Included in every plan through the API, the MCP server and the plugins.
Time structure
Reference snapshot
History available
Published inventory or reporting period; see coverage for the source dates.
Observation frequency
Varies by underlying publication.
Reporting lag
Reporting lag varies by source.
Inventory checked
2026-09-23. Coverage dates describe this checked inventory.

What's in this dataset

Flood zone and subtype
Published zone designation and subtype for each mapped area.
Special flood hazard area
Whether the area is inside the special flood hazard area.
Base flood elevation
Elevation, unit and vertical datum where the map publishes one.
Source date
Publication date of the state's flood map package.

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Query Flood hazard areas through Korzy

Every plan includes this dataset through the API and MCP server, and in Claude and ChatGPT through our plugins. The field catalog is free, so you can see what each request returns and costs before you spend credits.

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