Abstract
The city of Sete Lagoas is set in a karst system and has the presence of lagoons, which, in some cases, are interconnected to the regime of free aquifers. The objective of this work was to evaluate the water quality of the lagoons of Boa Vista, Brejao, Catarina, Cercadinho, Jose Felix, Mucuri and Paulino, situated in the city, over a period of 12 months, through physical and chemical analyzes. Conductivity, pH, turbidity, chloride, calcium, magnesium, sodium and potassium parameters were determined. The results showed that the Paulino and Mucuri lagoons presented higher sodium and conductivity index and, since they are located in the central area of Sete Lagoas, may have been influenced by anthropic actions. In addition to these, the Brejao lagoon presented high values of potassium, which may be related to the agricultural activity developed in its environment. In this sense, the study of the water quality is of fundamental importance so that the county can develop specific measures to improve the quality of the waters of each pond and improve evaluating the basic sanitation of the city.
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