In the bachelor thesis we deal with environmental risks of mercury in Malachov area. We divided the work into the following sections. The first three parts are focused on the analysis of the issue, setting the objectives of the work and the characteristics of the area solved. In the fourth part we took samples of assimilating organs of European beech (Fagus sylvatica), raspberry (Rubus cp.), flowers of the coltsfoot (Tussilago farfara), soil, water, onion (Allium cepa), potato (Solanum tuberosum), chives (Allium schoenoprasum), rhubarb (Rheum rhabarbarum), fruits of the walnut (Juglans regia), currant (Ribes rubrum) and dried mushrooms (Fungi) from two sampling sites (Bloody Well and Malachov) to May 2019. The results were analyzed on the atomic absorption spectrophotometer AMA 254 and in the last part processed into tables and graphs. In the samples of assimilating organs of beech forest juvenil we measured the average concentration of mercury 0.0308 ± 0.0013 mg.kg-1, in beech forest - adult 0,0321 ± 0,0027 mg.kg-1, in raspberry blackberry 0,5025 ± 0,0408 mg.kg-1 and 0.0805 ± 0.0156 mg.kg-1 in medicinal subcutaneous flowers. The soil contained a mercury concentration ranging from 1.2990 ± 0.3410 mg.kg-1 - 6.5010 ± 1.7690 mg.kg-1 and water 0.0007 ± 0.0003 mg.l-1. In nuts, the concentration was 0.0016 ± 0.0001 mg.kg-1 and in the currant 0.0010 ± 0.0001 mg.kg-1. Onion, 0.0016 ± 0.0002 mg.kg-1, in rhubarb 0.0018 ± 0.0001 mg.kg-1, in chives 0.0117 ± 0.0015 mg.kg-1, in potato 0.0043 ± 0.0007 mg.kg-1 and in dried mushrooms 11.8516 ± 1.38065 mg.kg-1. The resulting values were compared with the limits from which some of the components, in particular, the soil and fungi are seriously contaminated with mercury. However, mercury in the soil has no significant impact on crops in this area