Notes: Radon is mentioned in the regulation because of the European directive (98/83/EB). It only mentions radon in the sense that the annual radiation dose from radioactive substances in water may not exceed 0.10 mSv/year. Lead Agency: Icelandic Food and Veterinary Authority. Website: <<https://www.reglugerd.is/reglugerdir/eftir-raduneytum/umhverfisraduneyti/nr/4496>>