The rules are national
This page explains what the countries have in common. It is not a compliance guide. The reference level, the measurement period, the number of detectors and the duties of the employer are set by the law of each country: read the page of yours before you measure.
Requirements by country
Countries with a documented workplace protocol. Figures come from the regulation of each country.
| Country | Regulation | Reference level | Minimum duration | |
|---|---|---|---|---|
| United States | EPA/ANSI-AARST | 148 Bq/m³ | 0.07 months | Read the requirements |
| Austria | RnV Workplace | 300 Bq/m³ | 6 months | Read the requirements |
| Finland | STUK Workplace Protocol | 300 Bq/m³ | 2 months | Read the requirements |
| Germany | StrlSchV §155 | 300 Bq/m³ | 12 months | Read the requirements |
| Ireland | EPA Protocol 2019 | 300 Bq/m³ | 3 months | Read the requirements |
| Italy | D.Lgs. 101/2020 | 300 Bq/m³ | 12 months | Read the requirements |
| Norway | DSA Protocol | 200 Bq/m³ | 2 months | Read the requirements |
| Spain | IS-47 | 300 Bq/m³ | 3 months | Read the requirements |
| Sweden | SSM Workplace Protocol | 200 Bq/m³ | 2 months | Read the requirements |
| Switzerland | StSV Workplace | 300 Bq/m³ | 3 months | Read the requirements |
| United Kingdom | UKHSA/UKradon | 200 Bq/m³ | 3 months | Read the requirements |
Where radon concentrates at work
Radon enters from the ground. National rules focus on the same kinds of premises, with different criteria in each country:
- • Basements and rooms below ground level
- • Ground floors in contact with the soil
- • Underground workplaces: mines, caves, tunnels, galleries
- • Spas and facilities that handle groundwater
- • Premises in areas the national authority classifies as radon-prone
How a workplace measurement is organised
Check whether your premises fall under the rule
Each country defines which workplaces must be measured: by radon area, by type of premises or by floor. The page of your country states the criterion.
Work out the number of detectors
The national protocol sets how many detectors a surface needs and where they go. The calculator applies the protocol of the country you select.
Measure for the required period
Protocols require long-term passive detectors, placed for a minimum number of months and, in several countries, during the heating season.
Have the detectors analysed
The laboratory must hold the accreditation the country requires. Keep the report: it is the evidence of the measurement.
Act on the result
Above the national reference level the employer has duties: reduce the concentration, measure again and, in some countries, notify the authority.
Number of detectors for your premises
Select the country and the regulation, enter the surface of each floor and get the number of detectors the protocol requires.
Open the calculator