Assessment of Water quality For Balneability of Francisquinha Stream - Porto Nacional – TO

Abstract

The search for areas for recreation, directs people to subject themselves to bathing places with probable contamination, caused by sewage residues, concentrations of garbage among countless others that cause, the appearance of bacteria such as total coliforms and Escherichia coli (E. coli ). Microbiological analyzes were performed using indicators of total coliforms and Escherichia coli (E. coli), according to the method described by APHA (2005). The study sought to assess the water conditions of the Francisquinha stream hydrographic basin in the municipality of Porto Nacional - TO, for bathing purposes, according to CONAMA Resolution 274/2000. Using the parameters to detect and identify the presence of total coliforms and Escherichia coli, the Colilert technique was used. The results presented Escherichia coli were low, adapting in the classification of own bathing, according to CONAMA Resolution 274/2000. With the data presented in the study, during the analyzed period of six weeks, the results were satisfactory for recreation of primary use of the Francisquinha stream watershed.