Notes: Radon regulations for drinking water are established in Sanitary rules and norms SanPiN 2.6.1.2523-09 "Norms of radiation safety (NRB-99/2009)", Paragraph 5.3.5. Lead Agency: Federal Service for Surveillance on Consumer Rights Protection and Human Well-being (Rospotrebnadzor). Website: <<https://files.stroyinf.ru/Data2/1/4293828/4293828132.pdf>>