Scale:1 km grid size (approx. 1:1 000 000)
Coverage:Great Britain and Northern Ireland
Format:GIS polygon data (ESRI, MapInfo, others available by request)
Uses:Local-level to regional-level use
The joint UK Health Security Agency (UKHSA)-BGS Indicative Atlas of Radon in the United Kingdom presents an overview of the results of detailed mapping of radon potential (defined as the estimated percentage of homes in an area above the radon action level).
The Radon potential dataset for the United Kingdom provides the current definitive map of radon-affected areas in the United Kingdom. This data presents a simplified version of the radon potential dataset with each 1 km-grid square being classed according to the highest radon potential found within it, so is indicative rather than definitive.
The Indicative Atlas of Radon in the United Kingdom is also available from the UKHSA website as three published documents:
- England and Wales
- Northern Ireland
UKHSA recommends that radon levels should be reduced in homes where the annual average is at or above 200 becquerels per cubic metre (200 Bq/m3) — this is termed the radon action level.