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All you need to know about radon in workplaces


Radon measurements at workplaces are regulated in UK. These regulations oblige the owners or managers of these places to carry out radon measurements depending on the location. The UK radon map ranks the territory according to the risk linked to radon.

All the answers to your questions on the correct way to perform your radon screening at your workplace are below.

Do not hesitate to contact us in case you would like more details and be accompanied in your approach.

How to measure radon in a workplace

Are you obliged to measure radon or just want to do a voluntary radon measurement at your workplace, and you wonder how it works? Radonova makes it easy for you to perform a radon measurement.

Start by determining the number of detectors you need and then go to our online store to place your order.

Once received, place the detectors according to the instructions provided while noting the details related to the measurement. At the end of the measurement period, return the detectors to the laboratory. You will receive an analysis report within two week.

More information
Six steps to a radon-free environment in the workplace

When will radon be seen as hazard at a workplace?

Employers must comply with the UK Ionising Radiation Regulations 2017. This legislation requires employers as far as reasonably practicable to ensure the health and safety of employees and other people who have access to their work environment, for instance, members of the public in shops and schools.
Radon should be identified as a hazard if you have a workplace with one or more of the following circumstances:
Your building is in a radon Affected Area
Your building has a basement area that is occupied for more than 50 hours each year
You operate a mine, cave, or are responsible for any underground environments
Your business involves a suspected radon source such as ground water (e.g. water treatment works) or stored geological samples.

However, Radonova recommends to measure the radon systematically because no map makes will ever guarantee completely the presence or the absence of radon in the indoor air.

More information
Six steps to a radon-free environment in the workplace. A guide to check the radon content. Order radon measurement.

How many detectors do we need ?

To define how many detectors are needed to measure a workplace can be a real challenge.
For radon measurement in the workplace, Radonova recommends following International Radon Measurement Association (IRMA) guidelines. This means you will also comply with the United Kingdom’s method description. The advantage of IRMA’s guidelines is that their recommended measurement procedure helps to save time. It’s important not to have to return to conduct additional measurements due to having deployed too few detectors. You can work out the number of detectors you need using IRMA’s guidelines.

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When is the period to measure radon ?

You can measure at any time of the year and your result will be seasonally adjusted according to PHE seasonal correction factors

As a reminder, these measurements must be performed with an alpha trace detector over a period of two months minimum.

Usefullness of measuring radon during working hours

Measuring radon during working hours is normally done when a long term measurement resultated in radon value above the reference level. As the long term measurement is an average of radon concentration during day and night it really does not reveal the radon levels at working hours.

It is common to see different levels of radon between the hours of work or occapation of a building and the hours, typically at night, when the building is empty. From a health point view it the radon concentration during work hours which represent a danger.

Before doing a costly remedial measures, it is therefore important to measure radon during working hours.

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