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Activity concentrations of primordial radionuclides such as 40 K, 226 Ra and 232 Th were determined in edible mushrooms samples in Ekiti State Nigeria. The edible mushrooms collected are Termitomyces striatus, Psathyrella atroumbonata, Termitomyces robustus, Pleurotus tuber-regium and Pleurotus squarrosulus. The activity measurements were carried out by gamma spectrometry. The average concentrations of 40 K varied from 254.17 ± 46.78 to 416.07 ± 68.43 Bq•kg −1 , 226 Ra concentrations varied from 2.68 ± 0.82 to 21.64 ± 7.23 Bq•kg −1 and 232 Th concentrations varied from 8.57 ± 3.25 to 10.98 ± 4.31 Bq•kg −1. The concentrations were converted to effective dose. Effective doses calculated were found to be below maximum permissible levels. Therefore, no health risk is envisaged for those that normally consumed these mushrooms.

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