Resumo

RIOS RODRIGUEZ, Fabricio Antonio et al. Concentration of nitrates, phosphates, surfactants and their relationship with rainfall in the Puyo River. riha [online]. 2021, vol.42, n.3, pp. 3-21.  Epub 21-Jul-2021. ISSN 1680-0338.

This research was carried out in the 2016-2018 period, its objective was to determine the concentrations of nitrates, phosphates and surfactants in the sub-basin of the Puyo River and their correlation with other variables and rainfall. It was monitored in 28 points: 10 in the main course and 18 of its tributaries. The areas were characterized as high, urban and low. The average showed greater concentration in nitrates at the points: Rosario Yacu, bridge of Indulama river and headwaters of the Putuimi river, phosphates in: Fatima dam, Bellavista Baja, Pambay dam, Palmas dam and Bellavista and in surfactants at dam of the Mechanics and bridge of the Indulama river. It is concluded that the average concentrations do not exceed the limits established in the regulations.

Palavras-chave : water quality; phosphates; nitrates; people; surfactants.

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