https://www.sciencedirect.com/science/article/abs/pii/S0531513101005283 https://www.sciencedirect.com/science/article/abs/pii/S05315... In the german wikipedia

https://www.sciencedirect.com/science/article/abs/pii/S0531513101005283 https://www.sciencedirect.com/science/article/abs/pii/S05315... In the german wikipedia edition 814 mSv/a is mentioned (based on the linked study) for Ramsar, Iran. To be fair, a comment has been added stating: "Allerdings dürfte bei etwa 33.000 Einwohnern Ramsars die Kohortengröße von weit unter 5 % für die über 100 mSv/a Exponierten wahrscheinlich zu gering sein, um statistisch signifikante Gesundheitsfolgen festzustellen." Translated: The size of the measured cohort of 33.000 inhabitants of Ramsar of less than 5% for >100 mSv/a exposed participants is probably too small to allow to derive statistically significant health-related conclusions.