Indicative atlas of radon in Great Britain

BGS Technologies — Web map services

Every building contains radon (Rn) but the levels are usually low. The chances of a higher level depend on the type of ground. Public Health England 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:

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)


Indicative atlas radon 1km WMS 1.3.0 requests in British National Grid (BNG)


Indicative atlas radon 1km WMS 


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.

Get in touch

For more information about our datasets, technologies and map viewers please contact us

You may also be interested in



Applications, software and online services created by the BGS and our collaborators.

Show more
BGS Web map services

Web map services (WMS)

A standard method of providing map images that can be viewed in GIS software, virtual globes and portal-style websites using a map-based interface.

Show more

Was this page helpful?

  • How can we make this section better?*

  • Please select a reason*

  • How can we make this section better?*