Physical-chemical and microbiological analysis of waters from moscados stream in Maringá-Brazil

Clandestine dumping of untreated sewage and occasional dumping of waste from works on water bodies is still common. These factors alter water quality and can cause eutrophication, which leads to non-compliance of some parameters in relation to the legislation. Due to these facts, the present study aimed to analyze the physicochemical and microbiological quality of the waters of the Moscados Stream in Maringá / Brazil. The monitoring was performed through the parameters conductivity, turbidity, dis-solved oxygen, temperature, pH, total solids, ORP (oxidation-reduction potential), biochemical oxygen demand (BOD), chemical oxygen demand (COD), heterotrophic bacteria, coliforms totals and Escheri-chia coli. To perform this study, four data were taken in the stream during periods of rain and drought, and samples were collected at three different points. For the parameters analyzed in loco, the Horiba multiparameter probe was used. Results were compared with existing Maximum Permissible Values (MAVs) as determined by CONAMA Resolution No. 357/2005. Thus, nonconformity was observed in some parameters. It was possible to witness several construction waste discarded in a stretch of the mar-gin, as well as several silted points.