Abstract
The article describes the approaches to the implementation of hydrogeological zoning of Ukraine according to the structural-hydrogeological principle. In accordance with modern geostructural zoning in the Ukraine, the authors identified 10 hydrogeological regions of the first order. Each of the identified regions is characterized by its own peculiarities of the geological and hydrogeological structure, and as well as regional peculiarities of hydrogeological conditions. These patterns determine the conditions for the formation and distribution of the predicted groundwater resources and their quality indicators. The features of Ukraine’s hydrogeological regions of the first order are briefly characterized.