Monitoramento da qualidade do curso da água em três locais da comunidade América-PI

Abstract

Water is an important asset for life on Earth. This has countless uses for man, but it is not a renewable resource as is often taught. Water quality is extremely important considering its use for purposes such as human supply. The present research aimed to examine the quality of a water course located in the Comunidade América, municipality of Capitão de Campos – PI. Analysis comprehended the presence of coliforms using the Colilert® reagent, verification of the physical-chemical parameters of pH, conductivity, turbidity, dissolved oxygen, alkalinity, hardness, copper, iron, chlorine, comparing the results with the legislation of the CONAMA resolution in Art. 14. Two collections were carried out, one in March and the other in August of the year 2023. Bacteriological analyzes of samples from the three locations showed the presence of total coliforms and Escherichia coli in all collections, which is a concern for bathing and consumption. The pH of the water in March 2023 was below 6.0, outside the limits established for any CONAMA water class. The Barragem point was outside the standard for chlorine (0.08-0.11 ppm), and above the limit for iron (0.43 ppm). The turbidity values were within those established for the samples (up to 40 NTU). The August 2023 samples demonstrated a discrepancy in the Localidade intermediária, with 99.6 NTU (maximum allowed 40 NTU) and a value above that allowed for iron (maximum 0.3 ppm) being 1.62 ppm. Free and total chlorine were high (0.15-0.25 ppm) compared to the permissible limit (0.09 ppm). It was concluded that greater care is needed from the population when coming into contact with water from the course, as it did not present a good quality in accordance with class 1 fresh waters established by the resolution.