Real-Time Radiation and Radon World Maps
Worldwide monitoring stations
Select a marker to view its latest reported radiation or indoor radon reading. Use the time-range controls inside each map to display recent or historical reports.
Open full GMCMap
Select a marker to view its latest reported radiation or indoor radon reading. Use the time-range controls inside each map to display recent or historical reports.
Interactive London and South-East maps
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Radiation colour key (CPM)
0–50 CPM
50–100 CPM
100–200 CPM
Over 200 CPM
Radon colour key (pCi/L)
0.0–2.0 pCi/L
2.0–3.0 pCi/L
3.0–4.0 pCi/L
Over 4.0 pCi/L
CPM means counts per minute: the number of ionising-radiation events registered by a detector. Readings from different detector models are not always directly comparable.
pCi/L means picocuries per litre and is used here for indoor-air radon measurements.
Important: These are third-party readings from participating monitoring stations around the world, not measurements from the Newham weather station. Always consult official authorities for public-safety advice.
Interactive maps and station data supplied by GMCMap.







