ABSTRACT The project "Complex protection of the groundwater source Ostrava-Nová Ves" is aimed at the preparation of a feasibility study for protection of water withdrawal area. To enable realization of such project the information support system was prepared. The main tasks are integrated data management, standardization of data gained from various sources and integration of heterogeneous software, which cannot utilize the joint data base. The core of the proposed system is a database created in MS Access environment. The geographical information system of the area of interest was developed. A set of automated export procedures provides data transformed and exported from central database to GIS, GMS (groundwater modelling system), MS Excel, Rockware to assure central data management and processing of updated data. The system significantly facilitates data processing, data transfer between heterogeneous programmes, enabling the multi-user access and reducing the error level.