PHYSICAL QUALITY OF SUBTERRANEAN WATERS IN URBAN AREAS OF CITIES ON THE NORTHEAST COAST: THE CASE OF APICUM-AÇU - MA

Abstract

The research identified the potability conditions of the subterranean waters utilized by the urban population of Apicum-Açu - MA. To achieve the proposed goals it was analyzed the water levels of physical quality from the analysis of physical parameters: Potential Hydrogen(pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, and Turbidity. The samples were obtained in 49 tubular wells and waterholes inside the urban zone of the municipality and analyzed by a portable Aquaread AP800 multiparameter. To the ascertainment of the physical quality levels from the samples utilized, it was used the determined parameters defined by the Brazilian law in the patterns of water potability to human consumption established by the Normative Resolution in CONAMA 357/2005. The results found had identified that the pH shows itself as slightly acid to basic, the salinity in the majority of the wells presents at a low of 0,5% as well as other indexes of EC, TDS, and Turbidity found themselves inside the water quality levels of human consumption established by the CONAMA 357/2005. As such, it was possible to classify the subterranean water, inside the urban zone of the municipality of Apicum-Açu as potable, indicated to consumption, with caveats and recommendations that can contribute to maintaining and improving the levels of its potability.