Harmonization of hygienic standardization of chemicals in water by a general sanitary harmful index

Abstract

Introduction. The Russian hygienic standardization system of chemical compounds in water, providing the criteria for harmful effects not only on humans, but also on the sanitary state of water bodies, assumes the value of the general sanitary harmful index which differs local and international approaches to the hygienic standardization of chemical compounds in water. Aim of research. Justification of the differentiated hygienic standards in water system for various types of water management and the delivery of the algorithm for hygienic standards updating of chemical substances in water with general sanitary index of harmfulness on the basis of contemporary data on their hazard. Materials and methods. The research material included regulatory documents on the assessment of water quality and safety, methodological documents, and materials on hygienic standards of chemical substances in water for different types of water supply. Comparative analysis and expert assessment methods were used to propose the adjustment algorithm for hygienic standards. Results. The necessity of updating the existing hygienic standardization system of chemical in water with the establishment of differentiated maximum permissible concentrations (MPC) of chemical substances in various types of water management was justified. It was proposed to actualize maximum MPC, limiting harm index, hazard class for the substances standardized in water according to the algorithm of MPC correction (approximate permissible level) taking into account the current data on their hazard. Limitations. The research limitation is the lack of chemical hazard results considering current methods and approaches. Conclusion. The system of two different types of standards will promote more objective hygienic assessment of various types of water use: 1) for drinking water and water from sources of household and drinking water supply; 2) for water from water bodies of cultural and residential water supply.