Radon map UK
UK radon maps show where elevated indoor radon is more likely; they do not measure an individual home. Radon Map Check explains map bands and the next steps for UK householders. The postcode walkthrough is illustrative only. Verify an address with official UKradon services and use a home test to measure indoor radon.
Start with a postcode
Explore the checking process. This demo does not look up radon data or assign a risk band to your address.
No postcode-specific radon result is available here. The example band below is fictional and unrelated to the postcode you entered.
Example: a 3–5% band describes an estimated proportion of homes above the Action Level, not an indoor reading.
Verify on official UKradon ↗A band is a probability.
Not a reading.
the Action Level
Three steps to a more useful answer.
A postcode is a starting point. The result that matters is the radon concentration measured inside your building.
How postcode checks work →- Check the official map
Use UKradon for published radon potential and address-search options.
- Measure your home
Follow official testing guidance. A typical home test uses two detectors over three months.
- Act on a measured result
Read the result with the test provider and seek remediation advice when appropriate.
What does a radon map band tell you?
Radon Map Check distinguishes UK area potential from measured indoor concentration. A percentage on a map and a reading in Bq/m³ answer different questions.
| Information | What it describes | What it cannot tell you |
|---|---|---|
| Map band · % | Estimated likelihood of homes exceeding the Action Level in an area. | The radon concentration in your home. |
| Address report | Official estimated radon potential for a specific address. | A measured indoor result. |
| Home test · Bq/m³ | Radon concentration measured over the test period, interpreted by the provider. | A permanent guarantee for every room or future condition. |
Sources: UKradon: map and address searches; measuring radon.
Clear about what this demo does.
The postcode tool checks formatting only. It does not query an atlas, locate your address or calculate a radon level. Every valid-looking postcode receives the same educational walkthrough.
The 3–5% example is fictional and is never assigned to your postcode. No official map tiles or licensed radon data are reproduced.
About our sources and approach →Map ≠ measurement
Even an area with lower radon potential can contain homes with elevated levels. A map colour is not a safety certificate.
UKradon says basements, cellars and underground sites need particular consideration regardless of location.
Understand the limits of a map →Before you check
Is this the official UKradon map?
No. Radon Map Check is independent. Use the official UKradon map for published mapping and address checks.
Does a lower map band mean my home is safe?
No map band certifies a home as safe. It describes estimated area potential. A suitable indoor test is needed to find your home's radon concentration.
What is radon gas?
Radon is a naturally occurring radioactive gas that can enter buildings from the ground. Read the radon gas guide for its origin, health context and testing.
What is the UK Action Level?
The UK domestic Action Level is 200 Bq/m³ as an annual average. See UKHSA's published guidance and our risk guide for context. A demo postcode result is not a measurement.