Radon Risk in Devon

Last reviewed: March 2026 · Data: BGS Indicative Atlas v3.

46 postcode districts · 31 classified High or above · Average risk class: 3.6 / 5

Radon is a naturally occurring radioactive gas and the second largest cause of lung cancer in the UK. Risk varies significantly by location — the areas below show how Devon compares. 31 districts in Devon are classified High risk or above — testing is strongly recommended in these areas.

All Districts in Devon

District Risk Level % Homes
EX20 Highest >30%
EX35 Highest >30%
PL16 Highest >30%
PL19 Highest >30%
PL20 Highest >30%
PL21 Highest >30%
TQ10 Highest >30%
TQ13 Highest >30%
TQ8 Highest >30%
EX18 Highest 10–30%
EX19 Highest 10–30%
EX21 Highest 10–30%
EX31 Highest 10–30%
PL8 Highest 10–30%
TQ11 Highest 10–30%
TQ6 Highest 10–30%
TQ7 Highest 10–30%
TQ9 Highest 10–30%
EX16 Very High 5–10%
EX32 Very High 5–10%
EX33 Very High 5–10%
EX34 Very High 5–10%
EX36 Very High 5–10%
EX37 Very High 5–10%
EX38 Very High 5–10%
EX39 Very High 5–10%
TQ12 Very High 5–10%
EX1 High 3–5%
EX13 High 3–5%
EX22 High 3–5%
EX6 High 3–5%
EX10 Moderate 1–3%
EX17 Moderate 1–3%
EX2 Moderate 1–3%
EX7 Moderate 1–3%
TQ14 Moderate 1–3%
EX11 Low <1%
EX12 Low <1%
EX14 Low <1%
EX15 Low <1%
EX24 Low <1%
EX3 Low <1%
EX4 Low <1%
EX5 Low <1%
EX8 Low <1%
EX9 Low <1%

Get a Radon Test for Devon

The only way to know your home's radon level is to test. Radon levels in Devon are classified as Very High — a test takes 3 months and costs around £29.

UKRadon Postal Test Kit
From ~£29 · 3-month detector Airthings Corentium Home (Amazon UK)
~£99 · Digital · Ongoing monitoring

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