According to the NRC 1 WLM is a 5 to 10 mSv lung dose (0.5 to 1.0 rem), while the Organisation for Economic Co-operation and Development (OECD) consider that 1 WLM is equal to a lung dose of 5.5 mSv, the International Commission on Radiological Protection (ICRP) consider 1 WLM to be a 5 mSv lung dose for professional workers (and 4 mSv lung dose for the general public). Lastly the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) consider that the exposure of the lungs to 1 Bq of 222Rn (in equilibrium with its decay products) for one year will cause a dose of 61 μSv.
According to the NRC, 1 WLM corresponds to a lung dose of 5 to 10 mSv (0.5 to 1 rem), while the OECD considers it as a lung dose of 5.5 mSv, and the ICRP views it as a lung dose of 5 mSv for professional workers (and 4 mSv for the general public). Lastly, the UNSCEAR believes that exposure to 1 Bq of 222Rn in equilibrium with its decay products for one year will result in a dose of 61 μSv.