Objective: to study the sanitary condition of various environmental objects of the Rostov region and the degree of their contamination.Materials and methods: in the period from 2015 to 2019, more than 5600 sanitary and parasitological studies of environmental objects of the Rostov region were performed on the basis of the Rostov Research Institute of Microbiology and Parasitology: waste water and its precipitation, soil, water of open surface reservoirs. The work was carried out in accordance with the accepted normative documents.Results: it was found that 33.4 % of all tested samples were positive, and 1.4% of the samples contained viable eggs of various pathogens of helminthiasis and did not meet the requirements of regulatory documents.Conclusions: the results of the study indicate that the environmental objects of the Rostov region are polluted with parasitic pathogens and their unsatisfactory sanitary and parasitological condition.