Radon Potential Map for England and Wales Based on Indoor Measurements

Public Health England and the British Geological Survey jointly developed a definitive map of radon Affected Areas in England and Wales. The dataset estimates the probability that a property exceeds the radon Action Level of 200 Bq m-3, supporting legal property enquiries and building regulations.

Use Cases

• Identify radon Affected Areas with a 1% or greater probability of exceeding the Action Level for property purchase legal enquiries (CON29).
• Estimate the radon potential for individual properties to determine required protective measures under Building Research Establishment guidance (BR 211 2007).
• Analyze the correlation between indoor radon measurements and underlying digital geology information from DigMap50 V3.14.
• Support public health risk assessments by mapping areas where radon concentrations increase lung cancer risk.

Strengths

• Derived from authoritative sources: Public Health England indoor radon measurements and BGS digital geology data.
• Provides the current definitive map for radon Affected Areas in England and Wales.
• Addresses a standard legal enquiry (CON29) for property transactions.

Limitations

• Dataset has been superseded by a newer version covering Great Britain.
• Access to the underlying indoor radon measurement data is restricted, limiting reproducibility.
• Confidentiality practices for measurement locations may obscure precise spatial granularity.

Provenance

Source

British Geological Survey (BGS) and Public Health England (PHE), formerly the Health Protection Agency.

Collection Method

Joint analysis of PHE indoor radon measurements and BGS digital geology information from DigMap50 V3.14.

Time Range

null

Freshness

Superseded; last platform update recorded as 2026-03-11.

Geography

England and Wales.