Raw hydrobiological (abundance, biomass, and numbers of phytoplankton, zooplankton, zoobenthos, periphyton, and bacterioplankton species) and physicochemical indices of ecosystems are integrated into information system Ecology of Freshwater in Russia and Neighboring Countries. This system is dedicated to environmental control by biotic indices in former USSR countries. The information system is realized as an Ecograde application based on Microsoft Access software as well as a web site.