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The ecological state of surface waters in Lviv region is affected by various factors: soil and air pollution, technogenic load on the territory, inefficient operation of sewage treatment plants in settlements, pollution and littering of rivers with household and other waste. Another important problem leading to surface water pollution in the region is the absence of water protection zones and coastal protective strips. The lack of cartographic materials and the undefined boundaries of water protection zones and coastal protection strips result in violations of land and water legislation. Currently, the state of water bodies in Lviv region is unsatisfactory. The main problems in this area lie in the growing negative impact on the environment and human health. The main purpose of this paper is to create a web map of surface water pollution in Lviv region, in particular, using remote sensing data. To this end, we have collected and systematized geospatial statistical cartographic materials on the ecological state of surface waters. In addition to statistical data, remote sensing (RS) data obtained from various sources have been used to assess the state of surface waters. The necessary software for the development of such a web map has been identified. An algorithm for uploading geospatial data to the created web resource has been developed. Thus, the web maps of surface water pollution in Lviv region have been created in ArcGIS Online, a software environment. [ABSTRACT FROM AUTHOR]