Análise da qualidade da água utilizada para consumo do povoado Alegria em Teresina-PI

Abstract

Water in quantity and quality is a right for all, however, it is very common to analyze the contamination of surface and groundwater by contaminants from anthropic sources, which in contact with the water body, degrade and contaminate the water. The objective of this research was to analyze the water quality from the aquifer used for human and animal consumption in the village of Alegria rural area of Teresina-PI, which verified the presence of Escherichia coli bacteria from the irregular disposal of domestic effluents inadequately dumped in deactivated wells and by sinkhole type cesspits. Physical-chemical and microbiological analyzes of aquifer water were carried out, which enabled the classification of the water body in accordance with CONAMA Resolution 396/08, as well as its quality for human supply according to PRC No. 5/2017 of the Ministry of Health. The parameters analyzed were: nitrate, turbidity, total dissolved solids, electrical conductivity, pH and presence of Escherichia coli bacteria. For this, a survey of the existence of wells was carried out in the region, with questionnaires applied to the owners of each dwelling, in order to identify the active wells, deactivated or inadequately used as domestic effluent receptors, and georeferenced them for mapping. All physico-chemical parameters are within the standards required by PRC No. 5/2017, except turbidity values, however all samples from wells were tested for the presence of Escherichia coli bacteria except in the water from the central tubular well that supplies all the town, which is within the standards required for human consumption determined by current legislation