associated with consumption of water, oreochromis niloticus and chrysichthys nigrodigitatus from ero dam, ekiti, nigeria

Introduction: this study aims to evaluate the potential radiological hazard associated with the consumption of water and fish products from ero dam.material and methods: the activity concentrations of 238u, 232th and 40k in the samples were determined using gamma ray spectrometry.results: mean activity concentrations of 238u, 232th and 40k in water were 8.49 1.38, 4.12 0.40 and 150.99 10.80 bq/l respectively. in oreochromis niloticus and chrysichthys nigrodigitatus mean specific activity were 23.17 7.25, 14.25 , 740.86  bq/kg and 77.92 , 16.26 1.63, 842.90  bq/kg respectively. average annual effective dose for water (hw) was 1.58 msv/yr and for fish edible tissue (hf) 0.16 msv/yr. mean concentrations of 232th and 40k in water are 312% and 1400% higher than guidance levels and mean specific activity for 238u and 232th in fish were about three orders of magnitude higher than reference values. mean hw is about 1500% higher than the reference level and the average hf for fish is 540% higher than the recommended hf for natural radionuclides in fish products. mean elcr from consumption of water, oreochromis and chrysichthys are 1900%, 62% and 131% higher than the world’s average value from carcinogens respectively.conclusion: continuous consumption of water and fish products from ero dam is associated with potential radiation risks.