Radon Risk in Hampshire

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

61 postcode districts · 20 classified High or above · Average risk class: 1.9 / 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 Hampshire compares. 20 districts in Hampshire are classified High risk or above — testing is strongly recommended in these areas.

All Districts in Hampshire

District Risk Level % Homes
GU34 Highest 10–30%
PO10 Very High 5–10%
PO9 Very High 5–10%
RG22 Very High 5–10%
RG23 Very High 5–10%
SO24 Very High 5–10%
BH25 High 3–5%
PO11 High 3–5%
PO14 High 3–5%
PO17 High 3–5%
RG15 High 3–5%
RG21 High 3–5%
RG24 High 3–5%
RG29 High 3–5%
SO42 High 3–5%
SO5 High 3–5%
SO50 High 3–5%
SO53 High 3–5%
SO97 High 3–5%
SP6 High 3–5%
GU30 Moderate 1–3%
GU35 Moderate 1–3%
PO16 Moderate 1–3%
PO8 Moderate 1–3%
RG25 Moderate 1–3%
RG28 Moderate 1–3%
SO41 Moderate 1–3%
BH24 Low <1%
GU11 Low <1%
GU13 Low <1%
GU14 Low <1%
GU17 Low <1%
GU31 Low <1%
GU32 Low <1%
GU33 Low <1%
GU46 Low <1%
GU51 Low <1%
GU52 Low <1%
PO12 Low <1%
PO13 Low <1%
PO15 Low <1%
PO7 Low <1%
RG26 Low <1%
RG27 Low <1%
SO20 Low <1%
SO21 Low <1%
SO22 Low <1%
SO23 Low <1%
SO25 Low <1%
SO3 Low <1%
SO30 Low <1%
SO31 Low <1%
SO32 Low <1%
SO4 Low <1%
SO40 Low <1%
SO43 Low <1%
SO45 Low <1%
SO51 Low <1%
SO52 Low <1%
SP10 Low <1%
SP11 Low <1%

Get a Radon Test for Hampshire

The only way to know your home's radon level is to test. Radon levels in Hampshire are classified as Moderate — 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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