Water can undergo natural physico-chemical changes, but it is
often caused by anthropogenic action due to improper disposal of effluent.
These changes lead to eutrophication, which results in a high index of nutrients
such as phosphorus and nitrogen, leading to vegetation growth. Other
consequences may be fish mortality, dark water color of water, strong odor
and transfer of pathogens, which endangers population health. The present
work had as objective to perform analyzes of total phosphorus in the
Municipal Spa of Quatá-SP. The method used for the analyzes was Phosphorus
with Reactive Orthophosphate, adapted from the Standard Methods for the
Examination of Water and Wastewater and the results were compared with
the trophic state classes and the parameters of the legislation. At the end of
the analyzes, the values obtained from EIT were considered high,
compromising the quality of the water in some points.
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