Risk of Flooding from Surface Water

Published by:
Environment Agency
Last updated:
10 March 2025
Topic:
Not added
Licence:
Other Licence
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Summary

Risk of Flooding from Surface Water (RoFSW) map is an assessment of where surface water flooding may occur when rainwater does not drain away through the normal drainage systems or soak into the ground, but lies on or flows over the ground instead. It includes information about flooding extents and depths. It is produced using national scale modelling and enhanced with compatible, locally produced modelling from lead local flood authorities (LLFAs).

RoFSW is a probabilistic product, meaning that it shows the overall risk, rather than the risk associated with a specific event or scenario. In externally published versions of this dataset, risk is displayed as one of three likelihood bandings:

High - greater than or equal to 3.3% chance in any given year (1 in 30)
Medium - less than 3.3% (1 in 30) but greater than or equal to 1% (1 in 100) chance in any given year
Low - less than 1% (1 in 100) chance in any given year

NB. This is a complex dataset, with preview available only on certain zoom levels. The Web Mapping service has been set to 1:50 000 in the attribute. The services are set to be visible from the 1:50 000 scale range. There may be some variation, since end client software may interpret the request differently. Attribution statement: © Environment Agency copyright and/or database right 2025. All rights reserved.

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Data links

Link to the data Format File added Data preview
Download data by area of interest N/A 10 March 2025 Not available
Risk of Flooding from Surface Water - WMS N/A 10 March 2025 Not available
RoFSW_4band.lyr N/A 10 March 2025 Not available
RoFSW Product Description.pdf PDF 10 March 2025 Not available

Additional information

View additional metadata
Added to data.gov.uk
2025-01-28
Access contraints
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Harvest GUID
b5aaa28d-6eb9-460e-8d6f-43caa71fbe0e
Extent
Latitude: 55.816° to °
Longitude: -6.236° to 2.072°
Spatial reference system
http://www.opengis.net/def/crs/EPSG/0/27700
Dataset reference date
2024-10-30 (creation)
2025-01-28 (publication)
2024-10-30 (revision)
Frequency of update
quarterly
Responsible party
Environment Agency (pointOfContact)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

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Licence information

Open Government Licence