Ecological state of groundwater used as a source of potable water in urban areas of the city of Ivano-Frankivsk and its satellites is dealt with. Groundwater is assessed as a ratio between the content of pollutants and the relevant hygiene standards. Environmental assessment grounded on the materials of chemical analysis (74 samples) compared to maximum allowable concentrations and background values. Calculations of the value of hazard and the intensity of pollutions were the methods of ecological and geochemical evaluation of groundwater contamination. Based on calculation results, geochemical maps were compiled depicting satisfactory, hazardous and critical degrees of hydro-ecological situation. Developed maps can serve for the purposes of further geochemical monitoring of ecological situation.