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Floodplain Study
Published by Montgomery County, MD · Updated 10/30/2026 · Daily
- Last updated
- 10/30/2026
- First published 06/29/2016
- Update frequency
- Daily
- Formats
- 3
- CSV, JSON, XML
- Coverage
- Montgomery County, Maryland
- County in Maryland
About this dataset
The purpose of a floodplain study is to establish the 100-year floodplain limits within or near a development in order to preserve the natural resources within the 100-year floodplain, to protect property and persons, and to apply a unified, comprehensive approach to floodplain management. Update Frequency - Daily
Files and access
Links open the official government source
- CSV downloaddata.montgomerycountymd.govCSV
- JSON (SODA API)data.montgomerycountymd.govJSON
- XMLdata.montgomerycountymd.govXML
API endpoint: https://data.montgomerycountymd.gov/resource/78y7-gx22.json
Links open outside websites we do not control.
Frequently asked questions
- Who publishes Floodplain Study?
- Montgomery County, MD, part of Montgomery County, Maryland, publishes this dataset on dataMontgomery.
- How often is it updated?
- The publisher lists the update frequency as daily. The last update was on 10/30/2026.
- How do I download it?
- It is available as CSV, JSON, XML. Use the links in Files and access, which open the official government source.
Similar data from other publishers
- FloodplainsDistrict of Columbia · Federal Emergency Management AgencyThe National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters of Map Revision (LOMRs) that have been issued against those databases since theiCSVGeoJSONShapefileKML+1Updated 05/06/2025
- FloodplainsCity of Baltimore · Baltimore CityThis dataset represents areas of low lying ground subject to flooding. If you have any questions or need to report an issue for this dataset, please use the following feedback form to submit your response, and the Open Baltimore support team will contact you.CSVGeoJSONShapefileKML+1Updated 07/01/2026
- FloodplainsDistrict of Columbia · Federal Emergency Management AgencyThe National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters of Map Revision (LOMRs) that have been issued against those databases since theiCSVGeoJSONKMLZIP+2Updated 04/11/2025
- FEMA FloodplainCity of CharlotteA one-hundred-year flood is a flood event that has a 1% probability of occurring in any given year. The 100-year flood is also referred to as the 1% flood, since its annual exceedance probability is 1%,[1] or as having a return period of 100-years. The 100-yeaCSVGeoJSONShapefileKML+1Updated 10/16/2026
- Floodplain DataState of Virginia · Prince William CountyThe FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information.ArcGIS RESTUpdated 10/11/2026
Where this catalog comes from
- Data.gov CatalogU.S. General Services Administration
- State and local open data portalsSocrata Discovery API
- State and city CKAN portalsCalifornia, Virginia, Boston, Houston and more
- Government ArcGIS Hub sitesCity and county GIS data
Catalog checked 10/30/2026
We list dataset descriptions only. Downloads and APIs link straight to the official government source, which holds the current version and its terms of use.
Source: dataMontgomery and Data.gov · Last updated 10/30/2026 · Listing only; the data stays with the publisher
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