A grid computing infrastructure can be defined as a cluster of loosely coupled, networked computers acting in concert to perform very large tasks. Grid computing is an important part of the enviroGRIDS project, because it will allow one to perform computationally-intensive simulations of the hydrological balance of the Black Sea Catchment and will permit to analyze large quantity of high resolution data sets. It is therefore important that the ability to use grid computing is maintained throughout the project, but also after the project ends so that implemented tools and web portals can continue to use the grid as a backend. The main grid infrastructure used in the project will be the Enabling Grids for E-science in Europe (EGEE) infrastructure, whose access is facilitated through the enviroGRIDS partner CERN. Other types of grid infrastructures (international and national ones, desktop grids, volunteer grids, etc.) are available to the enviroGRIDS consortium, which should minimize the risk of lacking appropriate access to grid – or more generally distributed – computing. As the EGEE project ended on 30th of April 2010, the European Grid Initiative (EGI) took over. During the current transition from EGEE to EGI, the enviroGRIDS consortium must ensure that a sustainable access to the grid infrastructure is maintained. Several steps are necessary to secure access to the EGEE infrastructure. First, an enviroGRIDS Virtual Organization (VO) must be set up to ensure that all enviroGRIDS participants can access grid resources in the future. This will be made possible through partnerships with existing EGEE sites in Europe. Second, seeking membership in already existing VOs (such as Earth Science Research or Biomedical VOs) is recommended in order to multiply entry points into the EGEE infrastructure. Third, exploration and testing of alternative grid infrastructures, not dependant on the gLite middleware, should be explored. Finally, an important component of the enviroGRIDS project is capacity building, and this should also apply for grid computing related activities. Maintaining appropriate information on the enviroGRIDS website, communicating on grid achievement in the project, and facilitating access to the grid by non-technical users should be pursued by the management board with the help of partners involved in grid computing.