Regional application of complex groundwater quality indices and mapping for the territory of Bulgaria with possibilities for their us

The aim of this study is to perform a spatial complex hydrochemical analysis groundwater quality in Bulgaria and compile map. For purpose, data for the chemical composition (Ca2+, Mg2+, Na+, Cl–, SO42–, NO3–, HCO3–, TDS, EC) fresh (having shallow circulation) year 2015 have been summarized. These are waters most vulnerable incoming contaminants infiltrating from surface and, at same time, these importance provision potable water supply. Groundwater Quality Index has used assess domestic usage. An assessment potential groundwater’s corrosive activity also made. Langelier Saturation Potential Promote Galvanic Corrosion were determined as well. galvanic corrosion respect lead (expressed chloride-sulphate mass ratio) not mapped on territory Bulgaria, nor index groundwater. 2015, was classified being acceptable (76 90), good (90 95) condition terms Index. In Corrosion, country can be characterized by low moderate (for corrosion), according LSI it three categories – potentially corrosive, indeterminate, scale forming.