Ambient gamma radiation dose rates across the UK
Data received from fixed and mobile monitors measuring the ambient (background) gamma radiation dose rate across the UK.
Updates to this page
- From:
- Department for Energy Security and Net Zero
- Published:
- 22 January 2013
- Last updated:
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18 September 2026
Show all updates
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Published the ambient gamma radiation dose rates across the UK from fixed and mobile monitors for August 2026.
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Published the ambient gamma radiation dose rates across the UK from fixed and mobile monitors for July 2026.
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Published the ambient gamma radiation dose rates across the UK from fixed and mobile monitors for June 2026.
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Published ambient gamma radiation dose rates across the UK from mobile and fixed monitors for May 2026.
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Published ambient gamma radiation dose rates across the UK from mobile and fixed monitors for April 2026.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for March 2026.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for February 2026.
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Published the ambient gamma radiation dose rates across the UK from fixed and mobile monitors for January 2026.
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Added November and December files for fixed and mobile monitors.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for October 2025.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for September 2025.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for August 2025. Added note about changes to the latitude and longitude coordinates for many fixed monitors, in order to increase the accuracy of monitor location data.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for July 2025.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for June 2025.
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Published the ambient gamma radiation dose rates across the UK from fixed and mobile monitors for May 2025.
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Published the ambient gamma radiation dose rates across the UK from fixed and mobile monitors for April 2025.
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Published ambient gamma radiation dose rates across the UK from fixed and mobile monitors for March 2025.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for February 2025.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for January 2025.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for December 2024.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for November 2024.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for October 2024.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for September 2024.
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Added 'August 2024: ambient gamma radiation dose rates across the UK from fixed and mobile monitors'.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for July 2024.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for May and June 2024.
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Added ambient gamma radiation dose rates across the UK from fixed and mobile monitors for April 2024.
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Added ambient gamma radiation dose rates across the UK for fixed and mobile monitors, March 2024.
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Added February 2024: ambient gamma radiation dose rates across the UK from fixed and mobile monitors.
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Added January 2024 ambient gamma radiation dose rates across the UK from fixed and mobile monitors.
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Added December 2023: ambient gamma radiation dose rates across the UK from fixed and mobile RREMS monitors.
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Added November 2023: ambient gamma radiation dose rates across the UK from fixed and mobile RREMS monitors.
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Added October 2023: ambient gamma radiation dose rates across the UK from fixed and mobile RREMS monitors.
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Added ambient gamma radiation dose rates for fixed and mobile monitors, July to September 2023.
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Added ambient gamma radiation dose rates for fixed and mobile monitors April to June 2023.
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January, February and March fixed and mobile monitor rates added.
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Added July to December 2022 ambient gamma dose rate readings for mobile and fixed monitors.
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RIMNET has been replaced by the Radiological Response and Emergency Management System (RREMS).
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Added April to June 2022 ambient gamma dose rate readings for mobile and fixed monitors.
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Added: January-March 2022: ambient gamma radiation dose rates across the UK from fixed monitors January-March 2022: ambient gamma radiation dose rates across the UK from mobile monitors
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Added July to September 2021 ambient gamma dose rate readings for mobile and fixed monitors.
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Added April to June 2021 ambient gamma dose rate readings for mobile and fixed monitors.
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Added: January-March 2021: ambient gamma radiation dose rates across the UK from fixed monitors January-March 2021: ambient gamma radiation dose rates across the UK from mobile monitors
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October to December 2020 ambient gamma dose rate readings added for mobile and fixed monitors.
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July-September 2020 ambient gamma dose rate readings added for mobile and fixed monitors.
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April-June 2020 ambient gamma dose rate readings added for mobile and fixed monitors.
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RIMNET mobile data, January to March 2020 added.
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July to September 2019 mobile and fixed RIMNET data added.
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2019 Quarter 2 data for fixed and mobile monitors added.
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2019 Q1 data for fixed and mobile monitors added.
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2018 Quarters 3 and 4, 'Ambient gamma radiation dose rates across the UK' added
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Quarterly data for April to June 2018 (quarter 2 2018) published.
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Quarterly data for January to March 2018 published.
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Data for Q1 and Q2 2017 published.
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Q4 2016 ambient gamma radiation dose rates across the UK.
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First published.
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Documents
August 2025: Changes to latitude / longitude coordinates
https://www.gov.uk/government/publications/ambient-gamma-radiation-dose-rates-across-the-uk#august-2025-changes-to-latitude--longitude-coordinates
2024: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2023: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2022: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2021: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2020: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2019: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2018: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2017: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2016: ambient gamma radiation dose rates across the UK, fixed and mobile monitor readings
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2015: ambient gamma radiation dose rates across the UK
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2014: ambient gamma radiation dose rates across the UK
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2013: ambient gamma radiation dose rates across the UK
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2012: ambient gamma radiation dose rates across the UK
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2011: ambient gamma radiation dose rates across the UK
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2010: ambient gamma radiation dose rates across the UK
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Details
August 2025: Changes to latitude / longitude coordinates
We’ve recently upgraded our fixed monitor network to enhance performance and reliability.
A key improvement is the increased accuracy of monitor location data. As a result, the latitude and longitude coordinates for many monitors listed in the monthly report have been updated in the August 2025 summary.
All other monitoring data remains unchanged.
This data is received from fixed and mobile gamma radiation dose rate monitors and measures the ambient (or background) gamma radiation dose rate across the UK on an hourly basis.
From September 2022 onwards, dose rates are being made available from the Radiological Response and Emergency Management System (RREMS).
Dose rates from 2010 to September 2022 were available from the earlier Radioactive Incident Monitoring Network (RIMNET).
Elevated readings
The elevated readings, identified by red type in the ‘Max’ column of these files, are at a level which requires investigation. Each has been investigated and no specific reason found.
It is not unusual to have a small number of slightly elevated readings, often referred to as anomalies, which could be due to weather or power related factors, though the cause is often unknown. As no fault or reason was found, there is no justification for amending the readings on the RREMS database.