Introduction. The high level of environmental pollution in industrial cities, including carcinogens, causes an unacceptable risk to public health. In this regard, a quantitative risk assessment is required to develop preventive measures to reduce it. The aim of the study was to assess the carcinogenic risk to the health of the population of an industrialized city, caused by the probable presence of carcinogens in the ambient air, drinking water of the centralized water supply system, and the soil of the residential area. Material and research methods. The laboratory control of the content of carcinogens in environmental objects of the city of Voronezh for 2017-2020 was used as the reference data. The carcinogenic risk was assessed under the provisions of Guideline R. 2.1.10.1920-04 “Guidelines for assessing the risk to public health when exposed to chemicals that pollute the environment.” Results. Taking into account the regional peculiarities of the composition of pollutant emissions into the atmospheric air, 1,3-butadiene (source - production of synthetic rubber) should be classified as priority carcinogens requiring systematic monitoring and measures to reduce emissions and, accordingly, concentrations in the surface layer of atmospheric air and chromium6+ compounds (the main source is an aircraft plant), which contribute 69.9-75.7% and 21.7-26.9%, respectively, to the total values of the individual carcinogenic risk, which exceeds the maximum permissible level (1 • 10-4). The carcinogenic risk from exposure to drinking water pollutants (halogenated organic substances) and soil (under the scenario of accidental ingestion by preschool children) is below the maximum permissible risk (1 • 10-4). Conclusion. It is necessary to pay attention to increasing the sensitivity of the applied laboratory control methods, expanding the list of controlled carcinogenic pollutants, improving the monitoring system of carcinogens, and implementing measures to reduce the carcinogenic risk associated with atmospheric air pollution.

The aim of the study was to assess the carcinogenic risk to the health of the population of an industrialized city, caused by the probable presence of carcinogens in the ambient air. The results of laboratory control of the content of carcinogens in the atmospheric air of the city of Voronezh for 2017–2020 were used as the initial data. The carcinogenic risk was assessed in accordance with the provisions of Guideline R. 2.1.10.1920–04 «Guidelines for assessing the risk to public health when exposed to chemicals that pollute the environment.» Taking into account the regional peculiarities of the composition of pollutant emissions into the atmospheric air, 1,3-butadiene (source — production of synthetic rubber) should be classified as priority carcinogens requiring systematic monitoring and measures to reduce the volume of emissions and, accordingly, concentrations in the surface layer of atmospheric air and chromium 6+ compounds (the main source is an aircraft plant). These substances, depending on the territory (transport or industrial), contribute 69.9–75.7 % and 21.7–26.9 %, respectively, to the total values of the individual carcinogenic risk (from 4.27 × 10 –3 to 4.90 × 10 –3 for the adult population, from 3.38 × 10 –4 to 3.82 × 10 –4 for children 6 years old). For the rest of the laboratory controlled carcinogens (formaldehyde, lead, soot, styrene), the risks do not exceed the maximum permissible value. It was found that the territorial coverage of the urban area of Voronezh by monitoring the content of carcinogens in the atmospheric air (5 stationary and 5 route observation posts) and the number of laboratory-determined carcinogens (6 out of 18 taken into account in the projects of maximum permissible emissions of enterprises) is insufficient to obtain reliable information on the value carcinogenic risk to public health. To reduce the associated uncertainties in assessing the carcinogenic risk, further studies of the content of 8 carcinogens (1,3-butadiene, formaldehyde, lead, carbon black, chromium 6+, benzene, benz/a/pyrene, styrene) are planned at 13 additional control points of the urban area.

AIM: This study aimed to assess the radiation safety of surface water bodies used for recreational purposes and drinking water used by the population of the Voronezh Region (VR). MATERIALS AND METHODS: The fond materials of the Rospotrebnadzor Administration in VR in 20152019 were used. The following parameters were analyzed: total and activities and specific activity of radioactive substances in the water of open reservoirs (137Сs, 210Po, 226Ra, and 228Ra) and in the sources of drinking water (210Po and 222Rn). The annual effective dose was calculated on the basis of the probable consumption of drinking water from the centralized drinking water supply systems. The content of radionuclides in the water of open reservoirs was analyzed in three control points and in drinking water found in 2,036 water intake artesian wells of the centralized drinking water supply systems. Then, 100% of the sources were surveyed in terms of total and activities. The radiation safety of bottled drinking water from nine manufacturers was assessed on the basis of the data of the Federal State Sanitary and Epidemiological Surveillance. Water in open reservoirs and drinking water, including water packaged in containers, were laboratory controlled on the basis of an accredited testing laboratory center (Center for Hygiene and Epidemiology in the VR) by using MKS-01A Multirad spectrometric installation (Akvilon, Russia). UMF-2000 - and -radiometers were utilized to measure small activities (NPP, Doza, Russia). RESULTS: According to the regional databases of Rospotrebnadzor Administration regarding water from open water bodies for the population (three monitoring points: Tikhaya Sosna, Sukhaya Khvorostan, and Usman rivers) in 20152019, values did not exceed the intervention limit that was registered in terms of the content of the controlled radioactive substances (210Ро, 234U, 222Rn, and 137Сs) and the total and activities. Water from artesian wells used for drinking and domestic purposes fully met the requirements of radiation safety. The average annual effective radiation doses (AAERD) of the population in the VO in 74 settlements within the zones of radioactive contamination due to the Chernobyl disaster ranged from 0.05 mSv/year to 0.12 mSv/year, which was significantly lower than the threshold value (1 mSv/year). The analyzed drinking water samples, water packaged in containers, and the samples produced in the region were in compliance with sanitary and epidemiological requirements, including those for 90Sr and 137Cs radionuclide contents. CONCLUSION: Radiation monitoring in the VR revealed that the content of technogenic radionuclides (137Cs and 90Sr) and other standardized parameters of radiation safety in water of open reservoirs and drinking water did not exceed the threshold values.