Open Flood Risk by Postcode combines the Environment Agency's Risk of Flooding from Rivers and Sea with English postcodes from Open Postcode Geo. Each postcode is supplemented with the information from the flood risk area in which it is located. Postcodes are treated as a single point in space, allowing for the postcode to be looked up and the flood risk determined for that point. Note the value of SUITABILITY for a given area for how suitable the risk level is for a given purpose.
Important: We have taken a single point within the postcode and identified the flood risk area which that point falls within. There maybe other points within the postcode which fall into a different area, and hence have a different risk level.
Free to use for any purpose - attribution required.
Extracts from the 2017 version are available for the below regions:
If you would like a regional extract from the 2020 version, please email us.
|postcode||[outcode][space][incode]||Standard UK postcode.|
|The Environment Agency's ID for this area.|
|Likelihood of flooding. See descriptions below.|
|SUITABILITY||National to County
County to Town
Town to Street
Street to Parcels of land
Property (inc. internal)
|Scale at which it is suitable to use the likelihood information. See descriptions below.|
|Date (financial quarter) of publication|
|RISK_FOR_INSURANCE_SOP||NULL||This field is no longer supplied by the Environment Agency. The value for all postcodes will therefore be NULL. The most recent release with RISK_FOR_INSURANCE_SOP was February 2017.|
|easting||int||Along with northing defines the point within the postcode used to match a flood risk area.|
|northing||int||Along with easting defines the point within the postcode used to match a flood risk area.|
|latitude||decimal||Along with longitude defines the point within the postcode used to match a flood risk area.|
|longitude||decimal||Along with latitude defines the point within the postcode used to match a flood risk area.|
|Each year, there is a chance of flooding of greater than 1 in 30 (3.3%).|
|Each year, there is a chance of flooding of between 1 in 30 (3.3%) and 1 in 100 (1%).|
|Each year, there is a chance of flooding of between 1 in 100 (1%) and 1 in 1000 (0.1%).|
|Each year, there is a chance of flooding of less than 1 in 1000 (0.1%).|
|This value is added by GetTheData to indicate a postcode which is not in a flood risk area.|
|National to County||Suitable for identifying which parts of countries or counties are at risk, or which countries or counties have the most risk.|
|County to Town||Suitable for identifying which parts of counties or towns are at risk, or which counties or towns have the most risk.|
|Town to Street||Suitable for identifying which parts of towns or streets are at risk, or which towns or streets have the most risk.|
|Street to Parcels of land||Suitable for identifying which parts of streets or parcels of land are at risk, or which streets or parcels of land have the most risk.|
|Property (inc. internal)||Suitable for identifying which parts of a property are at risk (including internal / external distinction), or which properties have the most risk.|
We have built a reference application which allows you to search or drilldown to flood maps by postcode and plots postcode data on the map:
The Environment Agency's documentation for this product: Risk of Flooding from Rivers and Sea - Product Description.