Interactive Radon Map
Official radon classification by place. Coverage today: Spain, Ireland and Great Britain.
Radon Risk Level
A place without a point has no official classification. The Spanish list only names medium (Zone I) and high (Zone II) municipalities.
Click on a municipality to view details
Official Data
Every point comes from an official classification. The map shows no estimates.
Coverage
Spain: 4,042 municipalities of the Technical Building Code (CTE DB-HS6, Appendix B). Ireland: 349 towns placed on the EPA Radon Risk Map. Great Britain: 4,355 towns placed on the BGS/UKHSA Indicative Atlas. Northern Ireland is outside that atlas.
Action Zones
Spain: Zone II municipalities. Ireland: High Radon Areas, where employers must test. Great Britain: radon Affected Areas, with 1% of homes or more at or above 200 Bq/m³.
Data Sources
- Radon potential map of the Spanish Technical Building Code (CTE), DB-HS6 Appendix B. Ministerio de Transportes, Movilidad y Agenda Urbana.
- Radon Risk Map of Ireland (2022) © Environmental Protection Agency, licensed under CC BY 4.0. Each town takes the class of the map area its centre sits in.
- Indicative Atlas of Radon in Great Britain v3. Contains British Geological Survey materials © UKRI. Contains UKHSA data. Licensed under the Open Government Licence v3.0. Each town takes the class of its 1 km grid square, which shows the highest radon potential found in that square.