The countries of the world and of the European Union are developing hydrogeological models (HM) where, by means of computer modeling, the information necessary for the groundwater management is obtained. In 2010, Riga Technical University has started the project of HM that includes the whole territory of Latvia and border areas of neighbouring countries [1]. The project is co-financed by the European Regional Development Fund. HM accounts for 25 geological layers and its plane approximation step is 500 meters. HM will be applied, as the element of the Latvian shared Environmental Information System. It is supported by the Latvian Environment, Geology and Meteorology Centre. HM will comprise geological and hydrogeological information provided by the centre. To ensure compability with models of other countries, the commercial program Groundwater Vistas is used for running HM. HM must be completed till November, 2012 and, presently, HM is being used in regime of its calibration. The following first results are provided by HM: surfaces of geological layers for the active groundwater zone of Latvia (till the Pernava aquifer); they include also the digital relief map of Latvia with the hydrographical network included; distributions of heads for all aquifers included in HM; distributions of groundwater flows between aquifers (the infiltration flow is also obtained); the full spatial groundwater flow balance is also estimated.