Physical-chemistry tracking of the waters of Pampa Stream in Novo Hamburgo (RS)

Abstract

Watercourses that pass through heavily urbanized areas in their waters carry domestic sewage and industrial effluents. Brazilian environmental legislation determines the monitoring and classification of water bodies, with subsequent publication of results. But in most cases it actually does not occur. The Pampa stream with most of its territory in the municipality of Novo Hamburgo (RS, Brazil), passes very neighborhoods inhabited and has all the sewage of these areas drained by its waters. It is also a receiving body of industrial effluents. Despite its mouth is approximately 1.5 km from the point of abstraction of water for the consumption of more than 250,000 people, is typical example of this situation. This work monitored by one year the waters of the Pampa stream, and the waters of the Sinos river upstream from the mouth of the creek, with samples spaced approximately 45 days, seeking classification under CONAMA Resolution 357 and the influence of water the stream at the point of Pampa Rio dos Sinos where is the abstraction of water for the city of Novo Hamburgo. The determination of the parameters at the sampling points of the Pampa stream and the point located in the Sinos river upstream from the mouth of the creek, were performed by the Analytical Center of the University Center FEEVALE. The influence of the waters of the Pampa stream Sinos River at the point of capture of the Municipal Sanitation Company (COMUS) was performed using data from this company and the Foundation for Environmental Protection Henrique Luiz Roessler - RS (FEPAM), groups that monitor this point of withdrawal of water. The waters of the Pampa stream for some parameters showed similar characteristics to domestic wastewater occurring in some samples collected high levels of chromium and nickel. The relevant impact caused by the waters of the Pampa stream Rio dos Sinos is on domestic sewage. But the finding of significant levels of chromium and nickel determine preventive care and the influence of industrial effluents in the waters of the stream. The solution to the current dire state chemical and microbiological water of the stream Pampa necessarily entails the construction and operation of systems for domestic wastewater treatment, and an effective monitoring of industrial effluents.

Key words: water quality, monitoring, Pampa Stream.