When determining water quality indicators, the assessment is carried out taking into account the possible measurement error and the probability of conformity. If there are disputes regarding the values of the indicators to be determined, the probability of non-conformity with the quality requirements and the risk factors for such non-conformity should be correctly taken into account. Taking into account the fact that the issues of water relations are related to the economic relations of business entities and, consequently, potential contentious situations, the article shows the approaches to assessing conformity, it is justified that one can only trust the results obtained on the basis of a correct risk-based approach that takes into account both a posteriori and a priori data.

Issues of state policy in the field of improving the availability and safety of drinking water supply are focused most often on water treatment technologies. Tariff policy, being hostage to the political conjuncture, limits the possibilities of sustainable development of water supply, which requires a very balanced approach to the choice of technologies. To justify the choice of water treatment technologies in certain local conditions, an assessment of technological approaches based on the methodology of assessing the risk to public health together with a proper feasibility study should be carried out. Assessment of the population’s satisfaction with water supply services makes it possible to form various trajectories of drinking water supply to the population. Based on the analysis, taking into account modern international experience, it is necessary to consider the factor of formation of behavioural practice of safe water supply. Thus, the justification of solutions for the organization of drinking water supply for the end user requires taking into account the formed behavioural motives.

Automation of analytical control of the composition and properties of drinking and treated wastewater can be considered in two directions: compliance with quality requirements and optimization of the treatment process. Measuring systems with which it is possible to organize automatic control of the composition of drinking and wastewater allow real-time regulation of the technological processes of water treatment and water purification, as well as providing the required hygienic and environmental control in accordance with the requirements of environmental and sanitary legislation. The article presents approaches to standardization of automatic control systems of pollutants in water, shows the possibilities and some limitations of automatic control systems from the standpoint of standardization, identifies indicators that can be interchangeable for automatic control systems of pollutants in water, and presents methodological approaches to determining the corresponding conversion factors.