Questions about the creation on the basis of GIS ArcGIS ArcInfo common information space uniting data , system of estimates, models of objects, which allows to define complex condition of water areas, to investigate dynamics, allows to visually submit data about ecological situation on the card and to analyse tendencies of its progress are described. The pollution modeling based on use of interpolation geostatic methods gives the opportunity with a certain extent of reliability to reveal regularities of distribution of harmful substances to water areas.