Finns receive an average effective radiation dose of 5.9 millisieverts (mSv) annually, calculated on the basis of 2018 data.
By far the highest levels of ionizing radiation that Finns are exposed to comes from radon, with the most significant source being the home. The radiation dose from indoor radon is 4 mSv per year. Approximately 1.1 mSv of the radiation dose originates from natural background radiation other than indoor radon. Background radiation is partly cosmic radiation from space and partly the radiation from radioactive materials in soil and building materials.
On average, the medical use of radiation causes a Finnish person an annual effective dose of 0.76 mSv. The radiation dose fraction of the radiation dose caused by radioactive substances in Finnish nature following nuclear accidents and nuclear weapons testing carried out in the 1960s is extremely low.