Radon Risk in Essex

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

59 postcode districts · 0 classified High or above · Average risk class: 1.0 / 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 Essex compares. Most districts in Essex are at low to moderate risk, though testing is always worthwhile for peace of mind.

All Districts in Essex

District Risk Level % Homes
CM24 Moderate 1–3%
CB10 Low <1%
CB11 Low <1%
CM0 Low <1%
CM1 Low <1%
CM11 Low <1%
CM12 Low <1%
CM13 Low <1%
CM14 Low <1%
CM15 Low <1%
CM16 Low <1%
CM17 Low <1%
CM18 Low <1%
CM19 Low <1%
CM2 Low <1%
CM20 Low <1%
CM22 Low <1%
CM3 Low <1%
CM4 Low <1%
CM5 Low <1%
CM6 Low <1%
CM7 Low <1%
CM77 Low <1%
CM8 Low <1%
CM9 Low <1%
CM92 Low <1%
CM98 Low <1%
CM99 Low <1%
CO1 Low <1%
CO11 Low <1%
CO12 Low <1%
CO13 Low <1%
CO14 Low <1%
CO15 Low <1%
CO16 Low <1%
CO2 Low <1%
CO3 Low <1%
CO4 Low <1%
CO5 Low <1%
CO6 Low <1%
CO7 Low <1%
CO8 Low <1%
CO9 Low <1%
EN9 Low <1%
IG10 Low <1%
IG7 Low <1%
IG9 Low <1%
RM4 Low <1%
SS11 Low <1%
SS12 Low <1%
SS13 Low <1%
SS14 Low <1%
SS15 Low <1%
SS16 Low <1%
SS4 Low <1%
SS5 Low <1%
SS6 Low <1%
SS7 Low <1%
SS8 Low <1%

Get a Radon Test for Essex

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