Radon in Cornwall: Risk, Testing & What to Do
Cornwall has an average radon risk classification of Very High, based on BGS indicative atlas data covering 12 postcode districts. 10 of these districts are classified as High risk or above. Radon testing is recommended for all homes in areas with a High or above classification.
Why is Radon a Risk in Cornwall?
Cornwall sits on the Cornubian granite batholith, a vast granite intrusion rich in uranium and thorium. As these minerals decay, they release radon gas into the soil and air. Cornwall consistently records some of the highest radon levels in the UK.
District Data
Individual district data for Cornwall will be available in a future update. Use the postcode search below to check your specific area.
Get a Radon Test for Cornwall
The only way to know your home's radon level is to test. Radon levels in Cornwall are classified as Very High — a test takes 3 months and costs around £29.
From ~£29 · 3-month detector Airthings Corentium Home
~£99 · Digital · Ongoing monitoring
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Check Your Postcode
Enter your postcode to see the exact radon risk for your specific area within Cornwall.