The United States isn’t the only place where indoor radon levels are concerning. In the EU, regulations have been put in place to make sure that members are taking care of their citizens and lowering the risks of radon-induced diseases. COUNCIL DIRECTIVE 2013/59/EURATOM lays out the information. The EU recognizes that smoking and radon together pose a significant health-risk to their citizens.
In (23) it is stated:
National action plans are needed for addressing longterm risks from radon exposure. It is recognized that the combination of smoking and high radon exposure presents a substantially higher individual lung cancer risk than either factor individually and that smoking amplifies the risk from radon exposure at the population level. It is important that Member States address both of these health hazards.
Article 74 on page 31 explains the responsibilities of the Member States. These regulations must be in place by February 2018.
Indoor exposure to radon
1. Member States shall establish national reference levels for indoor radon concentrations. The reference levels for the annual average activity concentration in air shall not be higher than 300 Bq m–3.
2. Under the national action plan referred to in Article 103, Member States shall promote action to identify dwellings, with
radon concentrations (as an annual average) exceeding the reference level and encourage, where appropriate by technical or other means, radon concentration-reducing measures in these dwellings.
3. Member States shall ensure that local and national information is made available on indoor radon exposure and the associated health risks, on the importance of performing radon measurements and on the technical means available for reducing existing radon concentrations.
Radon-induced diseases are a global problem, and many countries are taking action to keep their citizens healthy. The United States EPA recommends testing your home and installing a radon mitigation system if the average indoor radon level is above 4 pCi/L.