The article begins with an acquaintance with the modern level of drinking water supply in the world, determining the hydrogeological parameters of the hydrosphere of groundwater in single and double layers, creating algorithms for forecasting and monitoring the dynamics of underground aquifers, and integrating hydrogeological modelling processes. Monitoring issues, statistics and information on research institutions working in this area. The article describes the creation of information and forecast maps of groundwater, comparison of relative level coefficients only on the basis of chronological homogeneous series of observations, monitoring of source consumption for regime characteristics and development of software for determining groundwater levels as average long-term maximum and minimum levels. and its results are presented.