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The aim of this study was to determine the activity of post-Chernobyl  137 Cs in Slovak bilberry ( Vaccinium myrtillus  L.) from selected locations of Slovakia depending upon: the season, location and the soil-plant transfer factor (TF). The  137 Cs activity was determined in samples of forest soil and bilberry bushes (stems, leaves and fruits) growing on the soil in three locations: Arboretum Mlyňany (1), Hodruša-Hámre (2) and Javorníky (3). Altogether we collected 35 samples; namely 15 samples from Arboretum Mlyňany, 10 samples from Hodruša-Hámre and 10 from Javorníky. The samples of soil were examined also for the activity of  40 K. The samples were collected in the spring, summer and autumn in the years 2019 and 2020 and were analysed by a gamma-ray spectrometry method. The highest levels of  137 Cs activity concentrations were determined in Hodruša-Hámre in September where they reached 161 ± 13 Bq.kg −1  in the soil, 3.95 ± 1.07 Bq.kg −1  in the stems and 14.7 ± 4.26 Bq.kg −1  in the leaves. The lowest levels were determined in the Arboretum Mlyňany in October where the  137 Cs activity in the soil reached 13.1 ± 1 15 Bq.kg −1 , while in the stems, leaves and fruits it was lower than the minimum detectable level. In the latter location, we also determined the highest activity of  40 K, the radioactive isotope physiologically and metabolically similar to  137 Cs. The mass activity of  137 Cs in all samples of bilberries were lower than the minimum detectable activity (MDA). The comparison of the results obtained in this study with the limit for total mass activity of radiocaesium ( 134 Cs +  137 Cs) in the food (600 Bq.kg −1 ) allowed us to conclude that the fruits, stems and leaves of Slovak bil-berries present neither health nor environmental risk.

Contamination of Slovak Bilberry (Vaccinium Myrtillus L.) with Radiocaesium 137Cs in Selected Slovak Locations

Contamination of Slovak Bilberry (Vaccinium Myrtillus L.) with Radiocaesium ¹³⁷Cs in Selected Slovak Locations