Natural Radioactivity in Thermal Waters: A Case Study from Poland

A natural radioactivity in thermal water was investigated based on 19 selected waters from Poland. The analysed results show that the radionuclides’ concentrations study vary over a wide range. temperature of varies above 20 °C to 80 °C. are characterised by different mineralisation, chemical compositions, and belong hydrochemical types. There is good correlation between depths aquifer formations occurrence, suggesting energy originates geogradient. concentration radium well correlated with mineralisation. ratio activity (226Ra/228Ra) groundwater relates not only uranium thorium (238U/232Th) formation, but also depends physical properties. Based radon its transport model, radiation exposures due inhalation 222Rn progeny for employees clients spa were assessed. use as drinking resource may be problematic possibility exceeding recommended annual committed effective dose 0.1 mSv.