Introduction: There are currently no generally accepted criteria for ranking territories according to a set of indicators characterizing the quality of drinking water supply, which requires the development and verification of criteria for classifying regions. Objective: To develop approaches to ranking territories of the Russian Federation based on indicators characterizing the state of drinking water supply and identifying health risk areas. Materials and methods: We have analyzed tap water quality indicators and characteristics of water supply systems in 15 regions of the Russian Federation included in the Arctic zone and the Northwestern Federal District based on data retrieved from the Federal Statistical Observation Form 18 “Information on the sanitary condition in the region” for 2021. A discriminant and correlation analysis were performed to verify the correctness of area classification. Results: We ranked the study regions based on 31 tap water quality indicators. The results of the discriminant analysis showed that six regions (Novgorod Region, Republic of Karelia, Arkhangelsk Region, Nenets Autonomous Area, Republic of Sakha (Yakutia), Chukotka Autonomous Area) were risk areas, 93.3 % of the original grouped observations were classified correctly. Poor chemical indicators of tap water quality in rural areas made a significant contribution to the classification of the regions as risk territories. Discussion: The selected quality indicators of drinking water supply are appropriate and sufficient for the regional level thanks to their universality for all territories. This fact is also confirmed by a strong statistical inverse correlation between the proportion of the population provided with quality tap water from centralized water supply systems and the calculated total score characterizing the state of drinking water supply. Conclusions: The study proved correctness of the choice of indicators characterizing the quality of drinking water supply for the classification of regions. Ranking of territories will allow developing management solutions to improve the quality of drinking water and identify regions that need priority measures aimed at preserving health of the population.

Introduction: Special attention is traditionally paid to monitoring nutrition in educational establishments as the forms and methods of work keep changing while the circle of participants expands. Parental control may serve as an important reserve for increasing the efficiency of control under the current conditions. Parental involvement in surveillance helps increase personal interest in principles of healthy eating and improve the overall hygienic literacy of inspectors and of those inspected. Objective: To analyze forms of implementing control over school meals. Materials and methods: Analytical and sociological methods were used to study the issues of providing hot meals for elementary school children, including satisfaction with the quality, quantity, and variety of meals and sufficiency of time to consume them within the survey conducted in the 2020/21 academic year in the city of Murmansk. The survey involved 21,755 schoolchildren, 17,977 parents, and 1,470 teachers. Together with parents, we rejected finished products, discussed the quality of school feeding, held Open Days and Degustation Days, summarizing the results of joint activities on a quarterly basis. Parental control measures were taken in accordance with MR 2.4.0180-20, Parental Control over Catering in General Education Institutions, approved by the Chief State Sanitary Doctor of the Russian Federation Anna Yu. Popova on May 18, 2020. Results: Since 2014, by agreement with school administration, parents and/or legal representatives of schoolchildren have been participating in parental quality control of school meals. Those having a personal health book are allowed to sample from the “common cauldron” and to control organizational activities in the dining room, including the compliance with the requirements of sanitary legislation for school catering. The findings of the sociological survey demonstrated that in 2020, children, parents and teachers were more satisfied with school feeding than in 2019. Conclusion: The experience of cooperation with parents in controlling school nutrition has proven its effectiveness and timeliness in taking corrective action to regulate logistics issues.