Groundwater quality georeferencing indexes of Itabapoana and Paraíba do Sul river mouth (Brazil)

Abstract

In the city of São Francisco de Itabapoana - RJ - Brazil, as well as in other regions of the country, lack of water supply in urban and rural areas have been solved much by drilling wells that the adoption of management measures to reduce losses and improve existing systems. The mapping of groundwater quality consumed in the villages of Itabapoana and Paraiba do Sul river mouth was accomplished through the use of Geographic Information Systems tool - GIS, where there was compliance with the potability standards for drinking water. For this, we studied twenty-one locations and analyzed physicochemical parameters (hydrogen potential (pH), turbidity, total chlorine, salinity) and microbiological parameters (total coliforms and fecal coliforms). The results revealed a potential contamination by total and fecal coliforms across much of the county and some physico-chemical parameters are out of standard quality of drinking water in many localities. The results indicate a precarious urban and rural sanitation in the municipality.