To ensure the protection of health and improve the quality of life of the population, uninterrupted high-quality water supply and sanitation is necessary, organized at the expense of groundwater and surface waters, the resources of which must be assessed both in quality and quantity. However, the problems of pollution, as well as the lack of a unified approach to accounting for water bodies, are still relevant. During the round table, it is planned to discuss issues of assessing the resource base of water supply and sanitation sources, reducing the negative impact on water bodies, methods of assessing and eliminating damage.