Radon Risk in West Sussex
Last reviewed: March 2026 · Data: BGS Indicative Atlas v3.
35 postcode districts · 17 classified High or above · Average risk class: 2.6 / 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 West Sussex compares. 17 districts in West Sussex are classified High risk or above — testing is strongly recommended in these areas.
All Districts in West Sussex
| District | Risk Level | % Homes |
|---|---|---|
| BN13 | Highest | 10–30% |
| BN14 | Highest | 10–30% |
| BN18 | Highest | 10–30% |
| BN45 | Highest | 10–30% |
| BN15 | Very High | 5–10% |
| BN4 | Very High | 5–10% |
| BN42 | Very High | 5–10% |
| BN43 | Very High | 5–10% |
| BN44 | Very High | 5–10% |
| BN99 | Very High | 5–10% |
| RH20 | Very High | 5–10% |
| BN12 | High | 3–5% |
| BN95 | High | 3–5% |
| PO19 | High | 3–5% |
| PO20 | High | 3–5% |
| PO21 | High | 3–5% |
| PO22 | High | 3–5% |
| BN11 | Moderate | 1–3% |
| BN16 | Moderate | 1–3% |
| BN17 | Moderate | 1–3% |
| GU28 | Moderate | 1–3% |
| GU29 | Moderate | 1–3% |
| PO18 | Moderate | 1–3% |
| BN5 | Low | <1% |
| BN6 | Low | <1% |
| RH10 | Low | <1% |
| RH11 | Low | <1% |
| RH12 | Low | <1% |
| RH13 | Low | <1% |
| RH14 | Low | <1% |
| RH15 | Low | <1% |
| RH16 | Low | <1% |
| RH17 | Low | <1% |
| RH19 | Low | <1% |
| RH77 | Low | <1% |
Get a Radon Test for West Sussex
The only way to know your home's radon level is to test. Radon levels in West Sussex are classified as 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
From ~£29 · 3-month detector Airthings Corentium Home (Amazon UK)
~£99 · Digital · Ongoing monitoring
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