Avaliação de propriedades físico-químicas de águas do município de Barra de Santa Rosa - PB.

Abstract

Water is of fundamental importance for the life of all species. Brazil is a privileged country regarding the availability of water, holds 53% of the fresh water source available in South America. The equatorial climates, tropical and subtropical acting on the territory, offering high rainfall. However, even with great availability of water resources, the country suffers from a shortage of drinking water in some places. Fresh water available in Brazil is unevenly distributed: approximately 72% of the water sources are present in the Amazon region, leaving 27% in the South Central region and only 1% in the Northeast region of the country. In the city of Barra de Santa Rosa-PB (inserted in the Drought Polygon) few studies have been conducted on the characteristics of the water. This study aims to evaluate the physical and chemical properties of water samples located in the municipality of Barra de Santa Rosa - PB. The methodology involved collection of four residential water samples in the urban area and three reservoir samples from perches (it provides water to supply the city). The parameters studied were pH, turbidity, electrical conductivity, total dissolved solids, total alkalinity, total hardness and chloride. Analyses of hardness to the supply network of waters were high; above 350 mg L-1 CaCO3, these waters are classified as very hard. The dam waters are classified as hard as they are with values between 100 and 200 mg.L-1 CaCO3. The alkalinity ranged from 41 to 50 mg.L-1, and electrical conductivity measurements showed a very close values between 3.38 to 3.46 mS.cm-1, while for the total dissolved solids had very high values, above permitted by the Ministry of Health - Ordinance. So for drinking water and dam of perches most analyzed physical and chemical parameters are within the acceptable standard for human consumption.