Indicative atlas of radon in Great Britain

Every building contains radon (Rn) but the levels are usually low. The chances of a higher level depend on the type of ground. UK Health Security Agency (UKHSA) and the BGS have published a map showing where high levels are more likely.

The darker the colour the greater the chance of a higher level of Rn. The chance is less than one home in a hundred in the white areas and greater than one in three in the darkest areas.

Service address

Enter this address into your WMS client: https://map.bgs.ac.uk/arcgis/services/GeoIndex_Onshore/radon/MapServer/WmsServer

The service supports the British National Grid and lat/long WGS84 coordinate systems and the data is visible when zoomed in between 1:100 000 and 1:25 000 scale.

Example WMS requests (versions 1.3.0 and 1.1.1 supported)

Can’t use the WMS?

Try the GeoIndex viewer if you are unable to use a WMS.

The data provided to view in this WMS is also available as a free download.

Terms of use

This data is delivered under the terms of the Open Government Licence, subject to the following acknowledgement accompanying the reproduced BGS materials: ‘Contains British Geological Survey materials © UKRI [year]’. Contact us if you create something new and innovative that could benefit others.

The BGS provides no warranty as to the quality, accuracy or completeness of this free map data or the medium on which it is supplied. This includes any warranty as to the continued provision of material or that the material taken from this site is compatible with your computer system and/or any other data with which the material is to be used.

Please be aware that the BGS may make changes to this service. This will include, but is not limited to, the level of attribution seen for each type of geology and changes to zoom thresholds.