Identify flood risk from surface water. 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. Attribution statement: © Environment Agency copyright and/or database right 2025. All rights reserved. Risk of Flooding from Surface Water 2024-10-30T00:00:00 2025-01-28T00:00:00 GIS Team GIS Team Not known GIS Team gisdata@oxfordshire.gov.uk Oxfordshire County Council environment inlandWaters planning risk assessment Open Government Licence. © Crown copyright and database rights 2024 OS AC0000851087 GIS Team GIS Team Not known GIS Data Team Oxfordshire County Council GISData@oxfordshire.gov.uk RoFSW is created using a combination of local flood model information and national flood modelling. These are used to generate the probabilities of flood risk for each 2m grid square of land, with the aim of using the best available flood risk information in any one location.