摘要：Physical, Chemical and Biological control of water quality is a key factor for human survival and health. Without water, there is no life on planet Earth which, in turn, is also known as Planet Water. In this article, it is investigated from chemical parameters, such as total alkalinity, chlorides, bicarbonate, phosphates, nitrates, hydroxides, nitrites, among others, water quality in five periods, comprised between 2014 and 2017 of an agro-industrial system of tannery, located in the city of Maringa (Brazil). The results found and analyzed under the auspices of the current environmental legislation demonstrate that the incoming water quality found in the system is in accordance with current environmental regulations, indicating an effective control of the implemented agro-industrial system and a water quality that does not make it harmful to the environment.
关键词：Monitoring;Parameters;Water quality;Monitoramento;parâmetros;qualidade da água
