Interactive UK Radon Risk Map

UK Radon Gas Map:
Find High-Risk Areas

Discover radon risk levels across the UK. Search by region or postcode to find if your area is affected by elevated radon gas concentrations.

4
High-Risk Regions
10
Total Regions
1M+
Homes Affected
Risk Levels:
Very High (>200 Bq/m³ in 25%+ homes)
High (>200 Bq/m³ in 10-25% homes)
Medium (>200 Bq/m³ in 5-10% homes)

UK Radon-Affected Regions

Cornwall

Very High Risk 30% of homes affected

Cornwall has some of the highest radon levels in the UK, with granite bedrock releasing significant radon gas.

30%
affected

Devon

High Risk 20% of homes affected

Devon, particularly Dartmoor and surrounding areas, has elevated radon levels due to granite geology.

20%
affected

Derbyshire

High Risk 18% of homes affected

The Peak District and limestone areas of Derbyshire show significant radon concentrations.

18%
affected

Somerset

Medium-High Risk 15% of homes affected

Parts of Somerset, especially Mendip Hills, have moderate to high radon levels.

15%
affected

Northamptonshire

Medium Risk 10% of homes affected

Certain areas of Northamptonshire have moderate radon levels requiring monitoring.

10%
affected

Oxfordshire

Medium Risk 8% of homes affected

Some parts of Oxfordshire show moderate radon concentrations.

8%
affected

Yorkshire

Medium Risk 7% of homes affected

Certain areas of Yorkshire, particularly the Dales, have elevated radon levels.

7%
affected

Cumbria

Medium Risk 9% of homes affected

Lake District and surrounding areas show moderate radon concentrations.

9%
affected

Lincolnshire

Medium Risk 6% of homes affected

Parts of Lincolnshire have moderate radon levels.

6%
affected

Scotland (Aberdeen, Grampian)

High Risk 12% of homes affected

Granite geology in Aberdeen and Grampian regions results in elevated radon levels.

12%
affected

In a High-Risk Area?

Get professional radon testing and mitigation from certified UK specialists.

Understanding the UK Radon Map

How to interpret radon risk levels and take action

Why Some Areas Have Higher Radon Levels

Radon gas originates from the natural decay of uranium in rocks and soil. Areas with granite, limestone, and other uranium-bearing rocks tend to have higher radon levels. The UK's geology varies significantly, creating distinct high-risk zones.

Public Health England estimates that approximately 5% of UK homes exceed the action level of 200 Bq/m³, but in high-risk areas like Cornwall, this can rise to over 30% of properties.

What the Percentages Mean

The percentage shown for each region indicates the proportion of homes where radon levels exceed the UK action level of 200 Bq/m³. This doesn't mean other homes have zero radon—all properties have some radon—but levels below 200 Bq/m³ are considered lower risk.

  • Very High (25%+): More than 1 in 4 homes exceed action level
  • High (10-25%): Between 1 in 10 and 1 in 4 homes exceed action level
  • Medium (5-10%): Between 1 in 20 and 1 in 10 homes exceed action level

Important: Individual Property Testing Required

Even if you live in a low-risk area, your specific property could still have elevated radon levels. The only way to know your home's radon level is through professional testing.

Neighbouring homes can have vastly different radon levels due to variations in construction, ventilation, and ground conditions. We strongly recommend testing regardless of your area's risk classification.

Concerned About Radon in Your Area?

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